1 . 4 . Power Drop; Excessive Fuel Consumption; Engine Hunting; Other Complaints - Robin EC05-2 Service Manual

114 POWER DROP
1) If the cylinder, piston or piston rings are worn, replace them or re-finish the cylinder by boring and fit oversize piston
and piston rings. Replace or clean sticking piston rings.
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NOTE: No oversize for EC052, 07-2.
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2)
If the carburetor is out of order, re-adjust or clean it.
3) If the spark plug is faulty (contamination, gas leakage or faulty insulation), clean it or replace it.
4) If combustion gas leaks through the cylinder, and cylinder head. joint, re-tighten the clamping screws.
If the gasket is faulty, replace it.
5 ) If the magneto or the contact breaker is faulty, replace them or re-adjust them.,
6 ) If the aircleaner is clogged, clean it.
7) If the fuel system is clogged,' clean it.
8)
If the oil seals at the crankshaft are worn and let the compressed gas through, replace them.
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11-5 EXCESSIVE FUEL CONSUMPTION
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1) If too rich air-fuel mixture, clean jets and small holes in carburetor.
2) If the throttle shaft of carburetoris worn, replace throttle shaft. (carburetor).
3) If fuel leakage, re-tighten screws or replace.
4) If beside these causes, also caused by power drop, perform remedies for power drop, according t o 1 1 4 . POWER DROP.
11-6 ENGINE HUNTING
1) If the governor lever, governor shaft, governor spring or other members are incorrectly adjusted, re-adjust o r correct
them.
2) If the fuel-air mixture is too lean. Clean the carburetor.
3) If the pilot screw in the carburetor is incorrectly adjusted, re-adjust it.
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4) If the governor spring
is
deformed permanently, replace it.
5) If the governor sleeve is not functioning correctly, correct it.
6) If the
flyweight or the governor sleeve is worn, replace the worn one.
7) If the governor shaft is not functioning properly, correct it.
11-7 OTHER COMPLAINTS
1) Fuel overflow from carburetor
If the fuel flows towards the aircleaner or much fuel flows into the crankcase while the engine is standing still (over-
flowing), the needle vahe or the float is faulty. Correct or replace them.
2) If the engine suddenly stops with abnormal noise, the piston or the crankshaft and connecting rod assembly is seized.
Correct them or replace them.
3) If t h e engine produces abnormal noise during operation, be sure to stop the engine and d o not start it again before the
cause is found.
If
the cause for the trouble
is
not found,- contact our distributor and entrust the engine in the hand of our service
engineer.
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