Troubleshooting - OHASHI ES72G Operation Manual

TROUBLESHOOTING

Stop the engine before inspecting.
Problems
Engine will not start
Low engine power
Clogging
Abnormal vibration of the
machine
Probable causes
(1) Empty fuel tank
(2) Fuel is not suctioned into
the combustion chamber.
(3) Wrong engine starting
procedures.
(4) Water in the fuel
(5) Deteriorated fuel retained
after long term storage
(6) Spark plug not in working
condition
(1) Dirty air cleaner
(2) Clogged engine air
inlet section.
(3) Low engine oil level
(4) Low engine speed
(5) Poor compression of
engine
Engine stops due to clogging of
woods in the feed roller
(1) Engine vibration due to
improper mounting
(2) Chipper knife comes off or
bolts are loose.
(3) The rotor housing vibrates.Re-tighten the bolts fixing the rotor housing.
(4) The rotor shaft bearing is
damaged.
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Remedial actions
Add fuel
Check suction carburetor and fuel strainer.
Refer to "Starting the Engine".
If water is trapped in the fuel filter, remove the
carburetor and fuel strainer to drain the water.
After draining, clean the carburetor and the fuel
strainer.
Drain the old fuel in the fuel tank, fuel filter, and
carburetor. Fill new fuel. In particular, check for
clogged main jet of the carburetor and clean it
thoroughly.
Remove the spark plug. If the plug is wet, dry it
over a flame or wipe it with dry cloth.
Dry the spark plug thoroughly. Adjust the air
gap to 0.6 to 0.7mm. If the engine will not
start even after the air gap adjustment,
replace the spark plug.
CAUTION
Replace the re-adjusted or new plug, and insert
the plug cap securely.
Clean the air cleaner and element with white
kerosene.
Thoroughly clean the air inlet.
Refill the engine oil. If the engine oil is deteriorated,
drain it and fill new oil.
Reduce the play in the throttle lever.
Adjust and correct the creeping of the throttle wire.
Tighten the spark plug and cylinder head bolts.
Otherwise contact your dealer to check for wear on
the piston rings.
Refer to "Feed Roller Clogging Release".
Check and re-tighten the engine mounting bolts
fully and securely.
Fit the chipper knife.
Re-tighten the bolts.
Replace with new one.