Karcher STH 5.56, STH 8.66 Troubleshooting, Risk of injury from starting the machine by mistake

Operating Manual – Snowthrower English

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.

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.

Have repair work carried out only by a specialist workshop which will use original replacement parts.

Fault	Possible cause		Action to take
Engine does not start.	Fuel tank empty.		Fill fuel tank.
	Fuel has gone stale.		Drain out stale fuel into a suitable container in
			the open air 1). Fill up tank with clean, fresh
			fuel.
	Engine is cold.		Set choke lever to “	”/“ON”.
	Choke lever is not set to “ ”/“ON”.
	Throttle lever is not set to “	”	Set throttle lever to “	”.
	(STH 5.56, STH 8.66, STH 10.66 C).
	Spark-plug connector not connected.		Put spark-plug connector on the spark plug.
	Air filter dirty.		Clean air filter 1).
	Spark plug dirty or defective.		Clean spark plug 1).
			Have defective spark plug replaced 2).
	Carburettor flooded.		Set choke lever to “OFF” and start engine.
Engine runs unevenly	Choke lever set to “ ”/“ON”.		Set choke lever to “OFF”.
(stutters).
	Spark-plug connector loosely connected.		Connect spark-plug connector firmly.
	Stale fuel.		Drain off stale fuel into a suitable container in
	Water or dirt in the fuel system.		the open air 1).
			Fill up tank with clean, fresh fuel.
	Vent hole in fuel filler cap blocked.		Clean fuel filler cap and vent hole.
	Air filter dirty.		Clean air filter 1).
	Carburettor altered.		Have carburettor reset 2).
Machine does not clear snow.	Shear bolts broken off.		Put in new shear bolts (see “Replacing a shear
			bolt”).
	Worm or throw-out chute blocked.		Stop engine, disconnect spark-plug connector.
			Eliminate blockage.
	Coupling cable for worm drive not correctly		Adjust coupling cable (see “Adjust coupling
	adjusted.		for the worm drive”).
	V-belt slack or torn (STH 953).		Tighten slack V-belt (see “Tightening the V-
			belt”). Have torn V-belt replaced 2).
	V-belt slack or torn (STH 5.56, STH 8.66,		Have slack V-belt tightened 2).
	STH 10.66 C).		Have torn V-belt replaced 2).

25