When Engine Won't Work Properly - OREC Snow Bull Manuel D'utilisation

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