TM 55-4920-384-13&P
Engine hard to start or fails to start.
Probable Cause
Possible Remedy
Pull choke control further out.
Carburetor not choked sufficiently
Push in choke control and crank until engine fires.
Carburetor flooded
Water or dirt in fuel strainer
Clean the fuel strainer, evaluate.
Battery cables loose or terminals corroded
Tighten battery cable connections
or remove and clean cables as required.
Clean or replace.
Spark plugs wet or dirty
Engine misses or runs erratically.
Water, dirt, or gum in the fuel
Clean the fuel strainer, if contaminated drain fuel
tank and fill with clean fuel.
Air cleaner clogged
Service air cleaner
Report to AVIM.
Carburetor out of adjustment
Engine stops suddenly.
Clean the fuel strainer, evaluate and drain fuel
Water or dirt in fuel strainer
tank and fill with clean fuel if necessary.
Service air cleaner.
Air cleaner clogged
Hydraulic fluid temperature above 160 F
Fill tank.
Fuel tank empty
Engine Overheats.
Stop engine and add oil to proper level.
Tighten air shroud. Report damaged shroud to
Air shroud loose or damaged
AVIM.
Report malfunction to AVIM.
Cylinder cooling fins clogged with dirt
Engine knocks or develops excessive
Noise.
Stop engine and add oil to proper level. Refer to
lubrication chart.
Engine Oil Pressure Low.
Stop engine and add oil to proper level. Refer to
lubrication chart.
Report malfunction to AVIM.
Oil pressure gage defective
Drain off excess oil to correct level.
Push in choke control.
Carburetor choked excessively
3-5