13, Troubleshooting
If the engine is defective, perform diagnosis by referring to the following table and then taking the
appropriate action.
Put the safety switch to the [start up]
position.
When cooling the engine, put the choke
bar in the position.
Inspect fuel tank, remove impure
deposits or water.
Remove the fuel valve strainer and clean
out any sediment deposited inside the
cap together with any other attached dirt.
Remove foreign objects, inspect
fastening bands, replace damaged parts
with new ones.
In cold weather, oil becomes thick, and
Use the correct oil depending on the
the engine rotation is sluggish.
outside temperature.
Ignition coil or unit is defective.
Replace the ignition coil or unit.
Inspect the gap between spark plug
electrodes and adjust.
Replace with new spark plug.
Fuel shortage.
Refuel the machine.
Clogged air filter.
Clean the element.
Poor quality fuel.
Replace with good quality fuel.
Return the choke bar completely. Put it
in the position.
Cooling system is clogged.
Clean around the recoil starter.
Fuel shortage.
Refuel the machine.
Fuel valve is closed.
Open the fuel valve.
Poor quality fuel.
Replace with good quality fuel.
Overfilled with engine oil.
Adjust to correct fuel level
Air filter element is clogged.
Clean the element.
Return the choke bar completely. Put it
in the position.
Overfilled with engine oil.
Adjust to correct fuel level
Cylinder or piston ring is worn out
Replace the ring.
Return the choke bar completely. Put it
in the position
Poor quality fuel.
Replace with good quality fuel.
Defective ignition coil.
Replace the ignition coil.
Fuel filter is clogged.
Clean the fuel filter.
＊P
lease consult with your local retailer. Charges may apply.
If you do not understand any of these points, please consult with the retailer where you purchased
this machine.
Effect
You have trouble
starting the
machine, or the
machine will not
start at all.
Fuel is not flowing properly.
Choke has not been fully opened.
Choke has not been fully opened.
Defective spark plug.
There is air or water mixed in the fuel
delivery system.
Choke has not been fully opened.
Treatment
Choke lever has not been pulled out.
Safety switch is not in the [start up] positio
Cause
Exhaust gas is
abnormally black
Exhaust has an
irritating smell.
Momentary stall.
Muffler emits gray
smoke.
Engine revolution is
not stable (does not
increase).
Muffler emits black
smoke and power
output falls.
The machine stops
suddenly.
Output shortage
Replace with good quality fuel.
Poor quality fuel.
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