Air Filter; Fuel Filter; Spark Plug - Maruyama B420L Manual Del Propietario U Operador

Air Filter

Maintenance Interval
• The air filter should be cleaned daily, or more
of ten when work i ng i n ext remely dust y
conditions.
• Replace after every 100 hours of operation.
Air Filter Cleaning
1. Loosen the knob and remove the air filter cover.
2. Remove the foam element.
3. Clean the foam element with warm, soapy water.
Let the element dry completely.
4. Apply a light coat of SAE 30 motor oil to the
foam element and squeeze out all excess oil.
5. Reassemble the foam element and the air filter
cover.
Air Filter Cover
Knob
Foam Element
— US-21 —

Fuel Filter

Maintenance Interval
• The fuel filter should be replaced after every 100
hours of operation.
• Fuel filters needing more frequent replacement
may indicate debris in fuel tank.
Fuel Filter Replacement
The fuel filter is attached to the end of the fuel pick-up
hose inside the fuel tank.
Fuel Filter
To replace the fuel filter:
1. Make sure the fuel tank is empty.
2. Remove the fuel cap.
3. Using a wire hook, gently pull the fuel filter out
through the fuel filler opening.
Use caution not to "fishhook" the fuel hose.
Replace immediately if punctured!
4. Grasp the fuel hose next to the fuel filter fitting
and remove the filter, but do not release the hose.
5. While still holding on to the fuel hose, attach the
new fuel filter.
6. Drop the new fuel filter back into the fuel tank.
7. Make sure that the fuel filter is not stuck in a cor-
ner of the tank, and that the fuel hose is not dou-
bled over (kinked) before refueling.

Spark Plug

Maintenance Interval
• The spark plug should be removed from the
engine and checked after each 25 hours of
operation.
• Replace the spark plug after every 100 hours of
operation.
Fuel Pick-up Hose
Wire