Spark Arrester Brochure

Spark Arrester

All internal combustion engines emit potentially dangerous sparks under normal operating condi­tions. These sparks, or carbon particles are formed as a product of combustion in the engine cylinder head and are constantly expelled through the exhaust system during engine opera­tion. Spark temperatures range up to 3,000 F. Dry grasses will ignite at about 400 F., making off highway vehicles a potential fire hazard! Add oxygen and a combustible material to hot exhausted sparks and the stage is set for a fire. This is why State (PRC 4442) and Federal law (CFR 261.52(j) require that off­ highway vehicles must have a Forest Service approved spark arrester, properly installed and maintained.

A spark arrester acts like an air filter, removing all solid particles from the exhaust stream. There are basically 3 types of spark arresters in use on today’s OHVs. These are the centrifugal, “Supertrapp” and “Krizman”­type.

All federal and state approved spark arresters have been rigidly tested, qualified and rated by the Forest Service Equipment Development Center, and any spark arresters installed on off­ highway vehicle equipment must meet their requirements.

Maintenance instructions included with the spark arrester should be followed closely. All spark arresters require regular servicing, prefer­ably as part of the routine maintenance of the equipment.

If the arrester is allowed to become too full of carbon particles, the unit will become ineffec­tive; increasing the chance of your being liable for negligence should a fire occur. Inspect the arrester frequently, checking the body for holes, rust, corrosion or other damage, making sure the internal components are not burned out or dam­aged. Remember, it is your responsibility to equip your vehicle with an approved spark arrester and see that it is properly maintained! All arrester parts must be unmodified to be legal.


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                Issued: 7/10