Makita EB7660TH Original Instruction Manual page 16

Fault location
Fault
Engine not starting or with difficulty
Warm start problems
Engine starts but dies
Insufficient performance
Interval of inspection and maintenance
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Engine oil Inspect / refill
Replace
Tightening parts Inspect
(bolt, nut)
Cooling air inlet Clean / inspect
Fuel tank Clean / inspect
Drain fuel
Throttle trigger / Check function
throttle lever
Stopping the Check function
engine
Adjustment of Inspect / adjust
idling speed
Air cleaner Clean
Inspect / replace
if necessary
Control cable Inspect / adjust
Inspect / replace
if necessary
Spark plug Inspect / adjust
gap if necessary
Clean / replace if
necessary
Plug cord Inspect / replace
if necessary
Fuel pipe Inspect
Replace
Fuel filter Clean / replace if
necessary
Oil tube Inspect
Valve clearance Inspect / adjust
(intake valve
and exhaust
valve)
Muffler Inspect / clean
Combustion Inspect / clean
chamber / valve
/ port
Engine Overhaul
System
Ignition system
Fuel supply
Compression
Mechanical fault
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Fuel supply
Several systems may simultaneously
be affected
Before After fuelling
operation
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Observation
Ignition sparks.
No ignition sparks.
Fuel tank filled.
No compression when pulled over.
Starter not engaging.
Tank filled. Ignition sparks.
Tank filled.
Engine idling poor.
Daily (10h) 50h
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(Note1)
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16 ENGLISH
Cause
Fault in fuel supply or compression
system, mechanical defect.
STOP-switch operated, wiring fault or
short circuit, spark plug or connector
defective, ignition module faulty.
Incorrect choke position, carburetor
defective, fuel supply line bent or
blocked, fuel dirty.
Cylinder bottom gasket defective,
crankshaft seals damaged, cylinder or
piston rings defective or improper seal-
ing of spark plug.
Broken starter spring, broken parts
inside of the engine.
Carburetor contaminated, have it
cleaned.
Incorrect idling adjustment, carburetor
contaminated.
Fuel tank vent defective, fuel supply
line interrupted, cable or STOP-switch
faulty.
Air filter contaminated, carburetor con-
taminated, muffler clogged, exhaust
duct in the cylinder clogged.
200h 600h or 2 years Before storage
whichever
earlier
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