-5-
Dirty or faulty spark plug
Cleaning/replacement
Defective air gap
Adjustment
Worn piston ring
Replacement
Expired oil seal service life
Replacement
Defective decompression valve
Cleaning/replacement
Revolutions too low for idling
Adjustment
Poorly adjusted carburetor ass’y
Adjustment
Revolutions too low for idling
Adjustment
Poorly adjusted carburetor ass’y
Adjustment
Defective sealing of the packing
Replacement
Revolutions too high for idling
Adjustment
Worn or faulty clutch
Inspection/replacement
Poorly adjusted carburetor ass’y
Adjustment
Clogged fuel filter
Cleaning/replacement
Inadequate warm-up, especially in cold
weather
Warm-up
Poorly adjusted carburetor ass’y
Adjustment
Clogged cylinder vent passage, exhaust port
or carbon-clogged muffler
Cleaning
Clogged air cleaner
Cleaning
Chain brake set on
Release
Poorly adjusted carburetor ass’y
Adjustment
Faulty carburetor ass’y pump diaphragm
Replacement
Dirt-clogged carburetor ass’y
Cleaning
Dirt-clogged high-speed fuel line of the
carburetor ass’y
Cleaning
Air intake from the packing section
Inspection
Faulty carburetor ass’y pump diaphragm
Replacement
Poorly adjusted carburetor ass’y
Adjustment
Revolutions too low for idling
Adjustment
Poorly adjusted carburetor ass’y
Adjustment
Clogged air cleaner
Cleaning
Poorly adjusted carburetor ass’y
Adjustment
Insufficient chain oil in the oil tank
Supply oil.
Clogged chain oil discharge port
Cleaning
Clogged guide bar oil feed port
Cleaning
Clogged oil filter
Cleaning
Poorly adjusted chain oil discharge amount
Adjustment
Defective oil pump
Replacement
When the speed rapidly
decelerates from high speed…
Revolutions fluctuate
The engine stalls
OK
OK
The engine stalls
The engine starts, but when
the throttle lever is pulled…
OK
High speed unavailable
Pulling the throttle lever
increases the speed.
When the revolutions
increase…
When the product is tilted
during idling…
The engine stalls
OK
The saw chain starts
rotating during idling.
Starts rotating
The engine stalls
OK
Starts up, and when idling
mode is set…
Is fuel consumption excessive?
Excessive
OK
Is chain oil discharged?
OK
No discharge
OK
