TEST OR INSPECTION
If filter is contaminated, remove lid and fuel hose from container,
hang in any available container to drain contaminated fuel. Retain
fuel filter after draining.
fuel is not contaminated, proceed to step 8.
Check for fouled spark plug.
spark plug is fouled, clean and re-gap to 0.030 inch (.75mm).
plug is not fouled, proceed to step 9.
Check for clogged fuel tank air vent.
Air must enter the tank between the tank lid and fuel line holder.
Clean any accumulation of foreign matter, ice, or snow, from around
fuel line holder and tank lid. Be sure fuel line
within the lid.
If fuel tank air vent is not clogged, proceed to
Check for blockage of engine cylinder fins
holder spins freely
and head fins.
If engine cylinder fins and head fins are clogged with leaves, grass-
es, etc., the engine will overheat. Clean all foreign matter from
around engine cooling fins.
If engine is clean and still runs roughly or stops, notify organiza-
ENGINE POWER OR SPEED.
Check for correct throttle position.
If throttle is closed, open throttle.
If throttle is open, proceed to step 2.
If choke is
If choke is
for closed choke.
closed, open choke.
open, proceed to step 3.
for contaminated fuel.
Refer to MALFUNCTION 2, Step 7.
If fuel is not contaminated, notify organizational maintenance.