USFS Rangers use the following procedures to inspect your spark arrester...
"Standard 5100-1c requires that each arrester shall be permanently marked with the model number and the manufacturer’s name or trademark. The model number must match exactly. The identification must be stamped in the metal body or on an attached metal plate. The words "Qualified" or "Approved" are not required, and do not indicate that the unit is in fact a qualified arrester."
- If manufacturer’s name and model number is found, refer to the "Qualified and Rated" list.
- If not on the "Qualified and Rated" list, check any SAG update information you have received since the time of the printing of your present SAG. The absence of an arrester from these lists indicates that the arrester has not been qualified.
- After the arrester has been identified, turn to the Drawing Section and check the spark arrester illustration for an exact match on the configuration, dimensions, and cleanout devices. The drawing must match the spark arrester you are inspecting.
- Suggested tools for inspections:
- a. Handtools to open cleanout, screwdriver, and pliers.
- b. Flashlight.
- c. 1/8-inch wire rod to probe inside arrester to ensure stationary vanes are in place.
- d. Tape measure.
- e. 0.024-inch wire gauge to determine screen size.
- Inspect to ensure that:
- a. The spark arrester is correct for the position of application.
- b.The exhaust system between the engine and the spark arrester is in good order.
- c. The arrester is properly maintained and cleaned out when necessary. xi
- d. There are no modifications to the exhaust system.
- Follow your agency's policies when an unqualified spark arrester system is encountered.