-31-
7.2
When engine won't work properly
If the engine malfunctions, perform diagnosis by referring to the following table and then taking the
appropriate action.
Effect
Possible cause
Treatment
Trouble starting
the engine
(Engine won't
start)
Fuel shortage.
Refuel the machine.
Choke has not been fully opened.
When cooling the engine, put the choke bar
[CLOSE ]
Poor quality fuel.
Replace with good quality fuel.
Clogged air filter.
Clean the element.
Choke lever has not been pulled
out.
When cooling the engine, put the choke bar
[CLOSE] position.
Pulled recoil starter many time to
start the engine with choke lever
[close] position.
Wait for a while to re-start. Also clean up spark
plug
Throttle lever is not at [start]
position
Put throttle lever to [start] position.
Fuel is not flowing properly.
Inspect fuel tank, remove impure deposits or
water. Remove the fuel valve strainer and clean
out any sediment deposited inside the cap
along with any other attached dirt.
There is air or water mixed in the
fuel delivery system.
Remove foreign object, inspect fastening
bands, and replace damaged parts with new
ones.
In cold weather, oil becomes
thick, and so the rotation of the
engine heavy.
Use the correct oil depending on the outside
temperature.
Ignition coil or unit is defective.
Replace the ignition coil or unit.
Defective spark plug.
Inspect the gap between spark plug electrodes
and adjust. Replace with new spark plug.
Output
shortage
Clogged air filter.
Clean the element.
Choke has not been fully opened.
Return the choke bar to [ OPEN ] completely
Cooling system is clogged.
Clean around the recoil starter.
The machine
stops suddenly.
Fuel shortage.
Refuel the machine.
Fuel valve is closed.
Open the fuel valve.
Exhaust gas is
abnormally
black
Poor quality fuel.
Replace with good quality fuel.
Overfilled with engine oil.
See that oil level is straight.
Muffler emits
black smoke
and power
output falls.
Air filter element is clogged.
Clean the element.
Choke has not been fully opened.
Return the choke bar to [ OPEN ] completely
Muffler emits
gray smoke.
Overfilled with engine oil.
Check that oil level is straight.
Cylinder or piston ring is worn
out
Replace the ring.
Engine power
is not stable
(does not
increase).
Choke has not been fully opened.
Return the choke bar to [ OPEN ] completely
Poor quality fuel.
Replace with good quality fuel.
Momentary
stall.
Defective ignition coil.
Replace the ignition coil.
Fuel filter is clogged.
Clean the fuel filter.
Exhaust has an
abnormal odor.
Poor quality fuel.
Replace with good quality fuel.
Summary of Contents for Snow Bull SGW803
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