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Operating Manual – Snowthrower
Troubleshooting
!
Risk of injury from starting the
machine by mistake
Before doing any work on this
machine
– Turn off the engine.
– Remove the ignition key and the
spark-plug connector.
– Wait until the engine has cooled
down.
Fault
Engine does not start.
Engine runs unevenly
(stutters).
Machine does not clear snow.
Caution
Faults encountered when operating
the machine sometimes have simple
causes which you can remedy
yourself. If you are in any doubt, or if
expressly instructed to do so, seek
the help of a specialist workshop.
Possible cause
Fuel tank empty.
Fuel has gone stale.
Engine is cold.
Choke lever is not set to "
Throttle lever is not set to "
(STH 5.56, STH 8.66, STH 10.66 C).
Spark-plug connector not connected.
Air filter dirty.
Spark plug dirty or defective.
Carburettor flooded.
Choke lever set to "
"/"ON".
Spark-plug connector loosely connected.
Stale fuel.
Water or dirt in the fuel system.
Vent hole in fuel filler cap blocked.
Air filter dirty.
Carburettor altered.
Shear bolts broken off.
Worm or throw-out chute blocked.
Coupling cable for worm drive not correctly
adjusted.
V-belt slack or torn (STH 953).
V-belt slack or torn (STH 5.56, STH 8.66,
STH 10.66 C).
Action to take
Fill fuel tank.
Drain out stale fuel into a suitable container in
the open air
fuel.
Set choke lever to "
"/"ON".
"
Set throttle lever to "
Put spark-plug connector on the spark plug.
Clean air filter
Clean spark plug
Have defective spark plug replaced
Set choke lever to "OFF" and start engine.
Set choke lever to "OFF".
Connect spark-plug connector firmly.
Drain off stale fuel into a suitable container in
the open air
Fill up tank with clean, fresh fuel.
Clean fuel filler cap and vent hole.
Clean air filter
Have carburettor reset
Put in new shear bolts (see "Replacing a shear
bolt").
Stop engine, disconnect spark-plug connector.
Eliminate blockage.
Adjust coupling cable (see "Adjust coupling
for the worm drive").
Tighten slack V-belt (see "Tightening the V-
belt"). Have torn V-belt replaced
Have slack V-belt tightened
Have torn V-belt replaced
Have repair work carried out only by
a specialist workshop which will use
original replacement parts.
1
). Fill up tank with clean, fresh
"/"ON".
".
1
).
1
).
1
).
1
).
2
).
2
).
2
).
English
2
).
2
).
25
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