United States
Department of
Agriculture

Forest Services

Technology &
Development
Program

5100—Fire Management
December 2002
0251 1204— SDTDC

USDA shield logo

EPA and CARB
Emission Standards
To Control Nonroad
Exhaust Emissions
of Fire Pumps and
Chain Saws

EPA and CARB Emission Standards
To Control Nonroad Exhaust Emissions of Fire Pumps and Chain Saws

Lois P. Sicking, Mechanical Engineer
Mark Zavala, Civil Engineering Technician



Introduction
New air emission regulations for all internal combustion engines impact fire pumps and chain saws used in wildland fire suppression. San Dimas Technology and Development Center (SDTDC) staff assessed the impact of these regulations and determined what equipment meets these standards. According to the Environmental Protection Agency (EPA), small internal combustion engines contribute 5 percent of the total manmade hydrocarbons in ground-level ozone formation, resulting in increased pollution-related urban health problems.

In 1995 the EPA established a regulatory process to set emission standards for several categories of nonroad engines at or below 25 hp. Allowable emission levels depend on engine size and use. Phase I and II standards for emission control of nonroad engines will continue to be phased in until the year 2007. Lower emission levels will be required in later years. Under the new regulations, engines are certified for a specific application/engine. For example, a chain saw manufacturer is responsible for certifying an engine/chain saw combination. A pump manufacturer who can show a low volume in sales, however, is responsible only for using an emission-certified engine for an engine/pump head combination.

The Canadian government and manufacturers, having entered into a memorandum of understanding regarding emissions standards, also agree to comply with the emissions standards and test procedures cited in EPA regulations.

When EPA Phase I went into effect in 1997, certain size classes of fire pumps and chain saws were discontinued. Pump manufacturers halted production of several 2-cycle lightweight water pumps, such as the Shindaiwa GP25, GP45, and STIHL® minilightweight portable pumps.

This SDTDC study found that chain saw manufacturers offer a full range of chain saw/engine combinations currently certified to EPA and California Air Resources Board (CARB) standards. The pump industry has also developed commercially available pumps that use EPA- and CARB-compliant engines. In the next step of the regulatory process, as required by EPA and CARB, all commercially available pumps will include an EPA-compliant engine.

When using an EPA-compliant engine, pump manufacturers who produce fewer than 10,000 units are not required to certify pump/engine combinations, unlike chain saw manufacturers, providing there is no available EPA- and CARB-compliant pump/engine combination, as is the current situation. If a manufacturer can prove a low-volume production status, the EPA Phase I certification overrides the mandated year 2001 deadline until model year 2009. Phase II would be required in the year 2010.

EPA penalties for noncompliance include a $25,000 fine to the manufacturer for each engine sold in the United States that is not EPA compliant. Federal law requires annual product certification with the EPA by manufacturers even if the products remain unchanged from the previous year’s certification. However, after a new product has been certified, a manufacturer can carry over the certification by paying the EPA an additional $1,400 per year per engine family, providing the product still meets the standards for the new year.

Background
The Clean Air Act of 1990 directed the EPA to study, and regulate if warranted, the contribution of nonroad internal combustion engines to urban air pollution. Because a 1991 EPA study documented higher-than-expected emission levels across a broad spectrum of engines and equipment, the EPA is seeking emission reductions for the following engine types:

The EPA developed a comprehensive strategy for reducing these emissions, including creating public awareness and implementing a regulatory process. The EPA has developed public information programs to teach consumers how to prevent pollution from nonroad engines by reducing gasoline spillage and choosing clean equipment.

These programs also inform consumers that electric equipment is cleaner than equipment powered by gasoline engines. Electrically powered lawn and garden tools, for example, produce essentially no pollution from exhaust emissions or from fuel evaporation. Even electric equipment is not pollution-free, however; power plants that generate the electricity do pollute.

Nonroad Engine Emission Control
Most nonroad or off-highway equipment and vehicles are powered by engines that burn gasoline or diesel fuel. Pollution from these engines is from byproducts of the combustion process/exhaust and from evaporation of the fuel itself.

Until now, because of the nonroad engines’ relatively low overall contribution to air pollution, emission control for these engines has not been a major design consideration. Consequently, these engines are not as clean as highway vehicles, which have been subject to regulatory controls for more than 20 years. Emissions from nonroad engines contribute as much as 15 to 20 percent of pollution in cities across the United States. Those emissions, described below, include hydrocarbons, particulate matter, nitrogen oxides, carbon monoxide, and carbon dioxide.

Hydrocarbons (HC) are unburned or partially burned fuel molecules that react in the atmosphere to form ground-level ozone, a major component of smog. Some hydrocarbons are toxic and may cause cancer or other health problems. Hydrocarbon pollution from nonroad engines also occurs as fuel evaporation when gasoline vapors are forced out of the fuel tank (for instance, during refueling) or when gasoline spills and evaporates.

Particulate matter is an exhaust product primarily from diesel-fueled vehicles. These microscopic airborne particles damage the respiratory system and contribute to the smoke and odor associated with diesel exhaust.

Nitrogen oxides (NOx) result from subjecting nitrogen and oxygen in the air to the high temperature and high pressure conditions in an internal combustion engine. Nitrogen oxides react with hydrocarbons in the atmosphere to form ground-level ozone. They also contribute to acid rain.

Carbon monoxide (CO) is a colorless, odorless, poisonous gas that results from incomplete fuel combustion.

Carbon dioxide (CO2) is the ultimate product from burning carbon-based fuel including gasoline. Carbon dioxide does not directly impair human health, but it is a “greenhouse gas” that contributes to the potential for global warming. As engine fuel economy declines, carbon dioxide emissions increase.

CARB Regulations
In addition to the EPA regulations, the CARB has developed regulations in accordance to the California Clean Air Plan. CARB Tier II regulations are currently more stringent than EPA regulations for both handheld engines under 65 cc and nonhandheld engines and will continue to be more stringent until 2003.

Starting in 2003, the EPA handheld standards will be more stringent than the CARB standards, depending on engine displacement. Proposed Tier III CARB regulations however are more stringent than the EPA regulations after 2005. These drafted regulations are scheduled for CARB action in December 2002.

Pumps with engine displacement of 40 cc or greater are exempt from CARB emission requirements. Chain saws over 45 cc are limited to Federal EPA control. CARB has authority over all handheld engines, except those established as farm and construction engines. CARB regulations and a preemption list appear on the CARB Web site http://www.carb.ca.gov. Click on Off-Road Mobile Source Emission Reduction Program, Small Off-Road Engines and Equipment Less Than 25 Horsepower, and formal regulatory documents page.

EPA Regulations
EPA Phase I emission standards, referenced in 40 CFR Parts 9 and 90 of July 3, 1995, have been in effect since production model year 1997. (The most recent version of the EPA emissions regulations is found in 40CFR90 of July 7, 2000.) The EPA estimates that Phase I regulations will reduce hydrocarbon pollution from engines by an average 33 percent, compared to hydrocarbons released by unregulated engines.

EPA Phase II emission standards, which are more stringent than Phase I standards, are expected to further reduce the hydrocarbons and reduce oxides of nitrogen by an additional 59 percent beyond the reduction resulting from the current Phase I standards. EPA Phase II also changes engine classes and adds a required useful life period determination. The Phase II standards are scheduled for phasing in between 2001 and 2007. The first year of Phase II is similar to Phase I except for additional durability testing. In the second year and in subsequent years for particular models up to 6 years, the emission standards become increasingly stringent. See table 1 for emission by engine displacement and classification.

EPA Phase I nonhandheld engine classes:
Class I—engines less than 225 cc in displacement; or

Class II—engines greater than or equal to 225 cc in displacement.

Engines powering equipment defined as handheld:
Class III—engines less than 20 cc in displacement; or

Class IV—engines equal to or greater than 20 cc and less than 50 cc in displacement; or

Class V—engines equal to or greater than 50 cc in displacement.

Table 1–EPA and CARB emission regulations.
Class ↓ /MY →
2000
2001
2002
2003
2004
2005
2006
2007
CARB - California Air Resources Board – Tier 2 No handheld / nonhandheld definitions
0 to 65 cc Classes III, IV, and V
72 g/k W-h CO=536→
65 to < 225 cc Class I
Special agreement engines
Special agreement engines
All horizontal 16.1g/kW-hr CO=467→
all vertical
≥ 225 cc Class II
B&S and Tecumseh TE engines
Same as 2000
All engines 12.0g/kW-hr CO=467→
EPA – Environmental Protection Agency – Phase 2 Nonhandheld classes 1, 1A, 1B, & 2 Handheld classes 3, 4, & 5
< 20 cc Handheld Class III
Phase I
Phase I
238 g/kW-hr CO=805→
175 g/kW-hr (2003)
113 g/kW-hr
50 g/kW-hr
50 g/kW-hr
50 g/kW-hr
20 to < 50 cc HH Class IV
196 g/kW-hr CO=805→
148 g/kW-hr (2003)
99 g/kW-hr
50 g/kW-hr
50 g/kW-hr
50 g/kW-hr
≥ 50 cc HH Class IV
Phase I
Phase I
143 g/kW-hr CO=603→
119 g/kW-hr
96 g/kW-hr
72 g/kW-hr
0 < 66 cc Class IA
Phase I
50 g/kW-hr CO=610→
66 < 100 cc Class IB
Phase I
40 g/kW-hr CO=610→
100 < 225 cc Class I
Phase I
August new designs 16.1g/kW-hr CO=610→
← new
← new
← new
August all engines 16.1g/kW-hr
≥ 225 cc Class II
Phase I
18 g/kW-hr CO=610→fi
16.6 g/kW-hr
15.0 g/kW-hr
13.6 g/kW-hr
12.1 g/kW-hr
Standard shown is HC + NOx or CO in grams/kilowatt-hour. California regulation is written in grams/horsepower-hour; those values have been translated to kilowatt for easy comparison with the EPA regulation.
The EPA definition of handheld remains similar in Phase II to the original in Phase I, but Classes I-A and I-B have been added for non-handheld engines of smaller displacement. Meanwhile California has dropped the handheld/nonhandheld distinction and uses a simpler displacement split between classes.

EPA Phase II describes two new engine classes: classes I-A and I-B, in addition to classes I and II defined in Phase I. Engine classes are specified by engine displacement and by the type of equipment the engine powers—either handheld or nonhandheld. Each of the seven Phase II engine classes has a unique set of emission standards.

The EPA anticipates that implementation of Phase II standards will generate significant reductions in emissions from the seven classes of engines with small increases in cost. It estimates the average price increase for handheld equipment to be $20 for Class III, $23 for Class IV, and $56 for Class V engines. (See the March 2000 EPA fact sheet, “Final Phase 2 Standards for Small Spark-Ignition Handheld Engines,” EPA420-F-00-007.) Engine manufacturers, however, have stated that the actual cost will be significantly higher than the EPA estimates.

Certification is accomplished by full emissions testing at 0 hours and again at the hours required for the chosen category for the useful life period: for example, 300 hours. To be certified the engine must be in compliance during both tests because emissions change in relation to an engine’s wear life, sometimes significantly. It is not unusual for a 2-cycle engine to meet the standards at 0 hours and then fail at 20 hours of use.

EPA Phase II nonhandheld engine classes are as follows:
Class I-A—engines less than 66 cc in engine displacement; or

Class I-B—engines greater than or equal to 66 cc but less than 100 cc displacement; or

Class I—engines greater than or equal to 100 cc but less than 225 cc displacement; or

Class II—engines greater than or equal to 225 cc in displacement.

EPA Phase II handheld engine classes are as follows:
Class III—engines less than 20 cc in displacement; or

Class IV—engines equal to or greater than 20 cc and less than 50 cc in displacement; or

Class V—engines equal to or greater than 50 cc in displacement.

EPA Phase II Useful Life Periods
EPA Phase II requires manufacturers to declare the applicable useful life category for each engine family at the time of certification as described in 40CFR90.105. Such shall be the category, which most closely approximates the expected useful lives of the equipment into which the engines are anticipated to be installed as determined by the engine manufacturer.

EPA and CARB Emission-Compliant Pumps
A full range of engines is commercially available for all classes of pumps meeting the EPA and CARB regulations. An engine that currently meets the lower requirements of later years provides an air quality advantage, and perhaps a sales advantage to the equipment manufacturer. For instance, all Honda general purpose engines sold in North America have been certified to the lowest emission level required in EPA Phase II regulations, or if different, at the emission level in the final phase-in year. Honda Class II GX340 and GX390 engines, designated as EPA Class II engines with an engine displacement greater than 225 cc, meet the CO 12.1 g requirement of 2005, beginning with the 2001 engine model year. Pump manufacturers have developed new lines of pump configurations to meet the emission standards, using low emission engines.

The next step, and as currently required by EPA and CARB regulations, is for pump manufacturers to provide only EPA- and CARB-compliant engines for pumps. To this end, manufacturers are phasing out several pump lines in the next 2 years, as indicated in appendix A.

The EPA has allowed small pumps as a category that by careful definition certify to the standard of the less-stringent handheld regulation. In 2002 that standard is 196 g of HC + NOx or CO. By contrast, the Honda engines in this category are certified below 50 g, which is the handheld requirement for 2005.

Briggs & Stratton (B&S) confirms that all engines sold by B&S in the United States are EPA and CARB compliant through model year 2002. In addition, the Vanguard Model 3504 engine used in the BB4 class pumps is EPA Phase II compliant for Class II engines for 2005 and later model years, which is the lowest standard in the Phase II regulation for Class II engines. The Vanguard Model 3504 engine meets the CARB regulations for Tier II standards applicable to 2006 and later model years.

The SDTDC has studied engines typically procured for fire suppression regarding compliance with EPA and CARB standards. Appendix A provides detailed information regarding these new pumps and current pumps. All pump performance information was provided by the manufacturer and does not imply testing or endorsement of pump performance by SDTDC laboratories. (See the EPA Website for other pumps not listed here. The EPA Website for the downloadable certification files is located at www.epa.gov/otaq/certdata.htm.)

The SDTDC collected information from manufacturers regarding when an engine meets a future-year emission requirement. This information is provided in tables 2 to 4 for pumps and table 5 for chain saws.

See table 2 and appendix A for minilightweight pump comparison, table 3 and appendix A for lightweight pump class comparison, and table 4 and appendix A for the large class pump comparison.

Table 2–Minilightweight centrifugal portable pump comparison (less than 30 lb)
Pump Model
Engine Model
Engine EPA- Certified through year
Dry Weight (lb)
Suction (in)
Discharge (in)
Number (cycles)
Power (hp)
Displacement (cc)
Oil/fuel (mix)
Shindaiwa GP450 Shindaiwa No 17.2
1-1/2
1-1/2
2
2.3
44
50:1
Wildfire Mini-Mark Robin ECO4ER No 14.3
1-1/2 NPSH
1-1/2 NPSH
2
2
40.2
25:1
Wildfire LAP Honda 2005 13.5
1-1/2 NPSH
1-1/2 NPSH
4
1.5
31
NA
Wildfire Mini-Striker Honda GXH50 2005 20
1-1/2 NPSH
1-1/2 NPSH
4
2.5
49
NA
Mercedes Textiles Wick 70-4H Honda GX31 2005 16.8
1-1/2 NPSH
1-1/2 NPSH
4
1.5
31
NA
Mercedes Textiles Wick 100 Solo 2001 16.8
1-1/2 NPSH
1-1/2 NPSH
2
2.3
40
24:1
Mercedes Textiles Wick 100-4H Honda GXH50 2005 20.2
1-1/2 NPSH
1-1/2 NPSH
4
2.5
49
NA

 

Table 3–Lightweight centrifugal pump (31 to 60 lb)
Pump Model
Engine Model
Engine EPA- Certified through year
No. of cycles
Power (hp)
cc (in)
Dry Weight (lb)
Suction (in)
Discharge (in) Displacement (cc)
Wildfire Mark-3
Rotax
No
2
8.5
185
55
1-1/2 9NH
1-1/2 9NH
Mercedes Textiles Wick 250
Motorpower
No
2
8
134
31
1-1/2 9NH
1-1/2 9NH
Mercedes Textiles Wick 375
Solo
No
2
10
210
53.5
1-1/2 9NH
1-1/2 9NH

 

Table 4–BB4 Class pump comparison (greater than 60 lb) Note: The Mallory, Wildfire, and Mercedes BB4 are not on the lightweight pump Qualified Products List at this time.
Pump Model
Engine Model
Engine EPA- Certified through year
Dry Weight (lb)
Suction (in)
Discharge (in)
Number (cycles)
Power (hp)
Displacement (cc)
Mercedes Wick F200-13H Honda GX-390
2005
117
2 NPSH
1-1/2 NPSH
4
13
389
Mercedes BN4200-13H Honda GX-390
2005
123
2 NPSH
1-1/2 NPSH
4
13
389
Wildfire Striker II Honda GX340K1
2005
119
2 NPSH
1-1/2 NPSH
4
11
337
Mallory MM4 B&S Twin V Vanguard
2005
143
2 NPSH
1-1/2 NPSH
4
18
690
Mallory M88 Kohler
No
130
1-1/2 9NH
1-1/2 9 NH
2
8
305
Mallory M88 Honda
2005
130
1-1/2 9NH
1-1/2 9 NH
4
9
270
Wildfire Ultra-striker Honda GX390K1
2005
126
2 NPSH
1-1/2 NPSH
4
14/13
389
Wildfire BB4 B&S Twin V Vanguard
2005
143
2 NPSH
1-1/2 NPSH
4
18
694
Wildfire BB4(in development) Honda
2005
*
2 NPSH
1-1/2 NPSH
4
20
*
Mercedes Textiles Wick BN4200 B&S Twin V Vanguard
2005
137
2 NPSH
1-1/2 NPSH
4
18
694
Mercedes Textiles Wick BN4200-18H Honda
2005
140
2 NPSH
1-1/2 NPSH
4
18
614

* In development

EPA- and CARB-Compliant Chain Saws
Chain saws used in wildland firefighting are classified as handheld equipment. Class III saws that are less than 20 cc typically are not used in wildland firefighting. Most chain saws are classified into class IV, with 20 to 49 cc. Some of the larger saws are in class V, with more than 50 cc engine displacement.

The EPA divides engines into classes based on whether they are handheld or nonhandheld and on engine displacement. Classes I, I-A, I-B, and II are for nonhandheld equipment, while classes III, IV, and V are for handheld equipment.

EPA Phase II standards become effective in model year 2002 for engines in classes III and IV and model year 2004 for engines in class V. The new rules will make it difficult for chain saw compliance because of the unique operating characteristics of the saws.

The EPA requires that engine manufacturers label all engines that are EPA compliant; or if the engine label is not readily visible, the manufacturer should indicate compliance on the piece of equipment itself. Because California requires that all emission-compliant engines have an emission conformity label on the engine for engines sold in the State, some engine labels cite compliance with both the EPA and CARB. (For a list of EPA and CARB-certified engines used in chain saws for 2001, see table 5.)

Table 5–EPA/CARB-certified engines used in chain saws in wildland firefighting. All engines are air cooled.
Brand
Model
Displacement (cc)
Engine family
EPA-Certified through year
Power(kW)
Rated speed
Husqvarna
136
36
1PWES.0404CS
2002
1.3 kW
8,000
141
40
Jonsered
2036
36
2040
40
Poulan 
2250
36
1PWES.0424CS
2002
1.42 kW
8,000
2450
36
2150
36
2050
36
2075
36
1950
36
2175
36
2025
36
Craftsman
358.350370
36
358.350440
36
358.350460
36
Poulan
2550
42
2375
42
2350
42
Craftsman

 

358.350380
42
358.350480
42
Poulan Pro Poulan Craftsman
220
42
1PWES.0464CS
2003
1.68 kW
9,000
260
42
2900
46
2750
46
2775
46
358.35020
46
Poulan Pro
295
46
Poulan
3450
54
1PWES.0605CA
2003
2.4 kW
9,000
Poulan Pro
330
54
Poulan
3750
60
Poulan Pro
380
60
Poulan
Patriot 1900LE
42
1PWES.0424CB  
2003  
1.3 kW  
9,000  
1950LE
42
2050LE
42
2075LE
42
2150LE
42
2175LE
42
2375LE
42
Craftsman
358.35054
42
358.35056
42
358.35057
42
358.35059
42
Poulan
2550LE
42
1PWES.0424CB
2003
1.34 kW
9,000
Poulan Pro
260LE
42
Craftsman
358.35058
42
Husqvarna
136 Low Emission
36
1PWES.036CB
2003
1.34 kW
9,000
ANDREAS STIHL
1A8XS.0354RD
35
1A8XS.0354RD
2001
2.199 bhp
9,000
ANDREAS STIHL
1A8XS.0354RD
1A8XS.0354RD
2001
2.199 bhp
9,000
ANDREAS STIHL
1A8XS.0474RA
46.5
1A8XS.0474RA
2001
1.904bhp
7,500
ANDREAS STIHL
1A8XS.0474RA
1A8XS.0474RA
2001
1.904 bhp
7,500
ANDREAS STIHL
1A8XS.0494RA
48.7
1A8XS.0494RA
2001
2.29 kW
9,000
ANDREAS STIHL
1A8XS.0494RA
1A8XS.0494RA
2001
2.29 kW
9,000
ANDREAS STIHL
1A8XS.0494RA
1A8XS.0494RA
2001
2.29kW
9,000
Echo/Kiortiz Inc.
1EHXS.0494RB
49.3
1EHXS.0494RB
2001
2.24 kW
8,500
Echo/Kiortiz Inc.
1EHXS.0494RB
1EHXS.0494RB
2001
2.24 kW
8,500
John Deere
1H2XS.0384RA
38
1H2XS.0384RA
2001
2.1 bhp
9,000
John Deere
1H2XS.0454RA
45
1H2XS.0454RA
2001
2.64 bhp
9,000
McCulloch Corp.
1MHXS.0384AA
37.7
YMHXS.0384AA
2001
1.12 kW
8,000
McCulloch Corp.
1MHXS.0384AA
YMHXS.0384AA
2001
1.12 kW
8,000
Shindaiwa
1SWXS.029403
28.5
YSWXS.029403
2001
1.6 hp
9,000
Shindaiwa
1SWXS.036404
35.5
YSWXS.036404
2001
1.7 bhp
7,500
Shindaiwa
1SWXS.036404
YSWXS.036404
2001
1.7 bhp
7,500
Shindaiwa
1SWXS.038405
37.7
YSWXS.038405
2001
2.2 hp
9,000
Shindaiwa
1SWXS.038405
YSWXS.038405
2001
2.2 hp
9,000
Shindaiwa
1SWXS.048413
47.9
YSWXS.048413
2001
2.2 hp
9,500
Shindaiwa
1SWXS.048413
WSWXS.048413
2001
2.2 kW
9,500
Shin-Daiwa Kogyo
1SWXS.074515
73.5
XSWXS.074515
2003
4.8 hp
9,000

Future EPA and CARB Certification Information
The published list of EPA emission-certified engines by model year appears on the Web at http://www.epa.gov/oms/equip-ld.htm The downloadable certification files are at http://www.epa.gov/otaq/certdata.htm and can be accessed by using Excel or FileMaker Pro software. The database is updated quarterly.

For further information regarding EPA compliance of engines, contact Joe Hresko or John Guy at the EPA Certification Department by e-mail at hresko.joe@epamail.epa.gov; or by phone at 202–564–9275 or guy.john@epamail.epa.gov, or by phone at 202–564–9276.

Replacement Parts and Repair
Manufacturers typically will continue to provide replacement parts for 7 to 10 years in support of engines out of production and are using some of the same parts for new product lines. For example, in 1997, Shindaiwa ceased production of the GP45 but continues to use many of the same parts in the new Shindaiwa GP450 (see appendix B). This information is useful to service GP45 pumps already in the national cache system. New or rebuilt parts can be used as long as they are the same configuration material and heat treatment as the original part. Replacement parts used in pumps and chain saws may not be manufactured by that specific industry. For example, a local automotive supply store may be able to supply bearings, point’s condenser, etc, identical to the original equipment manufacturer. Matching parts lists are available for some of the wildland pumps. (See the publication “Manitoba’s Alternate Parts Program for Medium Pumps,” published by the Canadian Interagency Forest Fire Center.)

Older equipment that was produced before emission regulations took effect is not required to be retrofitted with emissions equipment when brought in for servicing.

Tampering with an Emission-Certified Engine
Tampering with an emission-certified engine may reduce the life span and performance of the engine. Tampering, which is against the law and subject to a civil penalty/fine, includes the following:

Some manufacturers have equipped engines with special caps or plugs that limit or prevent adjusting the fuel mixture or engine timing. Removal of these special plugs and adjustments beyond the manufacturers’ specified limits is considered tampering.

In servicing an engine that has been tampered with, the EPA encourages repair technicians to restore the engine to the original certified configuration. This is required only if the repair is specific to the tampered with component/system.

Impact of Emission Regulations
EPA and CARB air emission regulations have pushed engine manufacturers to optimize current engine design to develop new product lines, and to support procurement of fire equipment for wildland fire suppression activities. Engines are available in each class of pump and chain saw to meet EPA and CARB 2001 emission requirements. Not all pumps, however, are driven by EPA and CARB emission-compliant engines, as indicated in tables 2, 3, and 4. All chain saw/engine combinations listed in table 5 have been certified to the indicated year of compliance. Within the next 2 years, the pump industry may be limited to only emission-compliant engines on pumps in the commercial marketplace.

To meet more stringent emission requirements, more engine manufacturers have developed or are in the process of certifying new engines for the years 2002 and beyond. The EPA estimates an increase in cost of at least $20 to $52 for each engine to implement these new regulations. Manufacturers estimate an increase in cost up to two to four times the EPA estimate, or $80 to $200 per engine.

Because chain saw engine manufacturers continue to invest resources in developing emission technology that incorporates current and scheduled future emission requirements into the core product line, limited resources are available to invest in new engine technology, such as a commercially available 4-cycle chain saw. The technology of the 4-cycle engine is important to emission reduction. Two-cycle engines are lightweight, basic in design, inexpensive to produce, powerful, and can reach high engine speeds but they have much higher emissions and smoky exhaust, as compared to 4-cycle engines. Such pollutants occur when some of the air/fuel intake mixture of the 2-cycle engine is expelled during the exhaust cycle and combustion of oil, since oil is mixed with fuel to lubricate the crankshaft, cylinder walls, and connecting rod assembly. Consequently, designing a 2-cycle engine to meet the more stringent emission requirements is a great challenge. New engine technology has focused more on lightweight, miniaturized 4-cycle engines, or “mini” 4-cycle engines, for smaller displacement chain saws and pumps.

Some chain saw manufacturers allocate resources only to class engines with the highest sales volume and plan to cease production on other engines. A prominent chain saw manufacturer expects to cease production of its Class III engines in 2003 and of its Class V engines in 2004. The company will maintain production of Class IV engines of 20 to 49 cc. Consequently, fewer product lines will be available for the consumer to choose from and sales competition will decrease.

The EPA essentially restricts manufacturers to production in the model year indicated, but allows for distribution of current inventory, regardless of the year manufactured. Provisions within the regulations prevent manufacturers from “stockpiling” inventory before ceasing production of a product line. Consequently, the consumer will be able to buy new chain saws or pumps certified to a prior year, but in limited quantity.

EPA and CARB have an “average banking and trading” emissions program in which a manufacturer is given “credits” for producing cleaner-than-required engines. Manufacturers can trade these credits for permission to produce engines that do not meet the current regulations. In this way, the EPA continues to realize an overall improvement in air quality while providing incentive to the manufacturer. The current ratio for converting credits is approximately eight clean engines to one out-of-compliance engine. Each year the ratio of clean engines will increase, with fewer out-of-compliance engines sold under the credit program. The banking and trading program, which the EPA and CARB closely monitor, allows the consumer to buy a limited number of out-of-compliance pumps or saws.

For further information, please contact the SDTDC fire program by e-mail at mailroom:wo_sdtdc@fs.fed.us or by phone at 909–599–1267.

Appendix A
Manufacturer Provided Information on Pumps Listed in Tables 4, 5.

All pump performance information was provided by the manufacturer and does not imply testing or endorsement of pump performance by SDTDC laboratories. (See the EPA Web site for other pumps not listed here.) The EPA Web site for the downloadable certification files is located at www.epa.gov/otaq/certdata.htm

Wildfire Lightning Attack Pump (LAP) pump

Optional Equipment

  • Thread protector
  • Helicopter package on special order
  • Repair tool kits. See figures A1 and A2.
  • Tyco-Ansul Inc. DBA Wildfire Tyco-Wildfire
    www.wildfire-equipment.com ,
    Phone: 800–426–5207, Fax: 819–849–0320

    LAP pump configuration
    Figure A1—LAP pump configuration.

    LAP Pump (Lighting Attack Pump)
    LAP pump performance curve
    Figure A2—LAP pump performance curve.

    Mercedes Textiles Wick-70-4H

    Wick-70-4H pump configuration
    Figure A3–Wick-70-4H pump configuration.

    Mercedes Textiles
    16633 Hymus Blvd., Kirkland, Quebec, Canada H9H 4R9
    http://www.mercedestextiles.com, Phone: 514–697–0817, Fax: 514–697–5297

    Wildfire Mini-Mark II
    According to Wildfire, the Mini-Mark II will be phased out by December 2002. Wildfire suggests that if pressure and flow are key, replace the Mini-Mark II with the Mini-Striker. Wildfire suggests using the LAP pump when backpacking or when having an external fuel tank is critical.

    Optional equipment

    Mini-Mark II pump configuration
    Figure A4–Mini-Mark II pump configuration.

    Mini-Mark II
    Mini-Mark II pump performance curve
    Figure A5–Mini-Mark II pump performance curve.


    Mercedes Textiles Wickman-100

    Standard features

    Optional equipment

    Wickman-100 pump configuration

    Figure A6–Wickman-100 pump configuration.


    Wickman-100

    Wickman-100 performance curve

    Figure A7–Wickman-100 performance curve.

    Shindaiwa GP450
    Shindaiwa discontinued the GP25 in 1996 and GP45 in 1997 in response to the EPA Phase I emission regulations that went into effect in September 1997.

    Shindaiwa has a replacement pump and engine, the GP450, with 2.3 hp. This pump is comparable to the GP45. In fact, many of the GP450 parts are interchangeable with the GP45 and GP25. Shindaiwa will market the GP450 internationally only where EPA regulations are not in effect. The manufacturer states that the GP450 engine is essentially the same as that of the GP45. However, the pump assembly is different. See appendix B for replacement parts for the GP45.

    Shindaiwa GP450

    Shindaiwa Inc.
    11975 SW Herman Road
    Tualatin, OR 97062
    www.shindaiwa.com
    Phone: 503–692–3070 Fax: 503– 692–6696

    Mercedes Textiles Wick-100-4H

    Wick-100-4H pump configuration

    Figure A8–Wick-100-4H pump configuration.


    Wick-100-4H

    Wick-100-4H pump performance curve

    Figure A9–Wick-100-4H pump performance curve.

    Wildfire Mini-Striker

    Standard features- Foam and retardant solutions pumping capability.

    Optional equipment

    Mini-Striker pump configuration

    Figure A10–Mini-Striker pump configuration.


    Mini-Striker

    Mini-Striker pump performance curve

    Figure A11–Mini-Striker pump performance curve.

    Wildfire Mark 26 - Out of production since 1997. Wildfire is investigating EPA/CARB-compliant replacement engine.

    Mercedes Textiles Wick-250

    Optional equipment

    Wick-250 pump configuration

    Figure A12–Wick-250 pump configuration.


    Wick-250

    Wick-250 pump performance curve

    Figure A13–Wick-250 pump performance curve.

    Mercedes Textiles Wick-375
    This portable pump is not listed on the 5100-274c lightweight pump Qualified Products List at this time.

    Standard features

    Optional equipment

     

    Mini-Striker pump configuration

    Figure A14–Mini-Striker pump configuration.


    Wick-375

    Mini-Striker pump performance curve

    Figure A15–Mini-Striker pump performance curve.

    Wildfire Mark 3
    This pump is listed on the 5100-274c lightweight pump Qualified Products List.

    Standard features

    Optional equipment

    Mark 3 pump configuration

    Figure A16–Mark 3 pump configuration.

    Wildfire Striker II

    Optional equipment

    Striker II pump configuration

    Figure A17–Striker II pump configuration.


    Wildfire Striker II

    Striker II pump performance curve

    Figure A18–Striker II pump performance curve.

    Mercedes Textiles- Wick-N4200-13H

    Wick BN4200-13H pump configuration

    Figure A19–Wick BN4200-13H pump configuration.


    Wick BN4200-13H

    Wick BN4200-13H performance curve

    Figure A20–Wick BN4200-13H performance curve.

    Mercedes Textiles Wick F200-13H

    Wick F200-13H

    Figure A21–Wick F200-13H.


    Wick F200-13H

    Wick F200-13H pump performance curve

    Figure A22–Wick F200-13H pump performance curve.

    Wildfire Ultra-Striker

    Optional equipment

    Ultra-Striker pump configuration

    Figure A23–Ultra-Striker pump configuration.


    Wildfire Ultra Striker

    Ultra-Striker pump performance curve

    Figure A24–Ultra-Striker pump performance curve

    Mercedes Textiles Wick-BN4200

    Wick BN4200 pump configuration

    Figure A25–Wick BN4200 pump configuration.


    Wick BN4200

    Wick BN4200 performance curve

    Figure A26–Wick BN4200 performance curve.

    Wildfire BB4

    Optional equipment

    BB4 pump configuration

    Figure A27–BB4 pump configuration.


    Wildfire BB4

    BB4 pump performance curve

    Figure A28–BB4 pump performance curve.

    Mercedes Textiles Wick- B4200-18H

    Mallory M88 with Kohler Engine

    Mallory Company
    1040 Industrial Way
    PO Box 2068
    Longview, WA 98632
    www.malloryco.com
    Phone: 800–625–5679 Fax: 360–577–4244

    Mallory M88 with Honda Engine

    Mallory MM11 with Honda Engine

    Mallory MM4 with B&S Engine

    Mallory MM4 with Honda Engine

    Mallory M90 with B&S Engine

    Mallory M90 with Kohler Engine

    Mallory M90 with Honda Engine

    Appendix B
    Shindaiwa GP45 and GP450 Mini-Lightweight Pump Part Interchangeability

    The following Shindaiwa GP450 parts are interchangeable between the GP450 and GP45.
    Cylinder
    Crank Case Assembly:
    70000-15140 arrester gasket
    11206-04080 screw PM SPW
    20000-21140 crank case dowel pin

    Piston:

    Rotor:
    20021-41341 thrust washer 01600-10251 rotor spring washer

    Recoil Starter Sub Assembly:

    20000-75130 recoil starter ratchet
    20000-75160 friction spring
    20020-75180 rope
    20000-75220 return spring
    20000-76210 starter pulley nut
    20020-76110 starter gasket

    20000-75150 friction plate
    20000-75170 friction plate screw
    20010-75190 starter knob
    70000-75230 starter pulley
    11022-04160 bolt SPW

    Carburetor Assembly:

    20000-81910 stay
    20000-81710 cleaner body
    20000-81740 filter
    20000-81760 air cleaner seal
    20000-81790 cleaner cover screw

    20000-81310 slow stop screw
    20010-81550 drain gasket
    20000-81730 air cleaner screw
    20010-81760 net B
    20000-81770 cleaner cover

    Fuel tank:

    20010-85201 fuel cap assembly
    20003-86130 cushion

    20010-85301 fuel cock assembly

    Special Tool:

    22900-91180 plug wrench

     
    Puller Assembly:
    22100-96121 lever center bolt
    20000-96140 lever bolt
    20021-96420 stopper
    20021-96621 boss bolt
    20000-96130 lever bolt
    20000-96411 rotor spanner
    20021-96611 puller
    20021-96630 puller guide pin

    The following GP450 parts are not interchangeable with the GP45:
    Cylinder: Crank Case Assembly:
    72905-15100 muffler comp

    70062-21000 crank case assembly
    20124-31110 fan cover
    Piston: Rotor:
    20021-41112 piston
    20021-41311 piston pin
    22152-41231 snap ring
     02403-03100 key
    22011-11411 switch
    20124-72520 bracket
    20124-58110 pump shaft
    Carburetor Assembly:
    Fuel tank
    20124-81000 carburetor assembly
    20124-81020 carburetor sub assembly
    20124-81180 throttle valve
    20124-81210 jet needle
    20124-81230 needle jet
    19404-00008 label choke
    20043-85410 fuel pipe
    20124-86110 tank bracket
    Casing:
    403-001 casing
    401-002 packing
    501-014 bolt
    403-004 casing cover
    501-005 bolt
    501-006 seal packing
    501-007 spring washer
    501-008 washer
    405-009 impeller
    401-010 mechanical seal
    405-011 inner casing
    403-012 packing
    401-013 valve case
    403-014 tapping bolt
    401-015 check valve
    401-016 house joint
    401-017 packing
    401-018 house coupling
    403-019 bend
    403-020 packing
    501-012 plug
    501-022 packing
    501-021 plug
    401-032 house band
    405-033 strainer
    405-036 base
    401-038 cushion
    405-030 handle
    401-037 tapping screw
    1001-024 spring nut
    501-024 flange nut
    405-034 bolt
    Puller Assembly: Special Tool:
    20000-96104 puller assembly
    20000-96114 lever
    20022-96210 air gap gauge
    20021-96601 puller assembly
    20000-96631 guide pin
    20035-96630 guide pin
    70110-91100 tool set
    19639-01100 poly bag

     

    Approximate English/Metric Conversion Factors for Units Used in this Document

    To Change
    To
    Multiply by
    feet
    gallons
    gallons/minute
    grams
    horsepower
    inches
    pounds
    quarts
    meters
    liters
    liters/second
    ounces
    watts millimeters
    kilograms
    liters
    0.
    3.
    0.
    0.
    745.
    25.
    0.
    0.
    305
    785
    063
    035
    7
    4
    454
    946

     

     


    TD logo
    For Additional Information Contact:
    Project Leader, Fire Management
    San Dimas Technology & Development Center
    444 East Bonita Avenue, San Dimas CA 91773-3198
    Phone 909-599-1267; TDD: 909-599-2357; FAX: 909-592-2309
    E-mail: mailroom_wo_sdtdc@fs.fed.us

    Information contained in this document has been developed for the guidance of employees of the Forest Service, United States Department of Agriculture (USDA), its contractors, and cooperating Federal and State agencies. The USDA assumes no responsibility for the interpretation or use of this information by other than its own employees. The use of trade, firm, or corporation names is for the information and convenience of the reader. Such use does not constitute an official evaluation, conclusion, recommendation, endorsement, or approval of any product or service to the exclusion of others that may be suitable.

    The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD).

    To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410 or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity provider and employer.

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