Karcher STH 8-66 - Manual (Page 18)

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The engine manufacturer assumes liability
for all engine-related problems as regards
output, output measurement, technical data,
warranty and servicing. For further details,
please refer the separate holder/ operator
manual of the engine manufacturer.
Troubleshooting
Fault Possible cause Remedy of whom
Engine does not
start Fuel tank empty. Refill the fuel tank. Operator
Fuel idling for a long time. Remove the old fuel in a suitable container in the
open (See "Engine Instruction Booklet"). Fill up
the tank with clean, fresh fuel. Operator
Engine in cold state; choke not set to "ON/
CHOKE". Set the choke to "ON/CHOKE". Operator
Gas lever no set to "fast". Set the gas lever to "fast". Operator
Ignition plug not inserted. Insert the ignition plug into the spark plug. Operator
Spark plug is dirty. Clean the spark plug (see "Engine Instruction
Booklet"). Operator
Spark plug is defective. Replace the spark plug. Customer
Service
Carburetor is overflowing. Set the choke to "RUN/OFF" and start. Operator
Cold start help (Tupfer) not activated. Use the cold start help (Tupfer). Operator
Engine is running
erratically Choke set to "ON/CHOKE". Choke set to "RUN/OFF". Operator
Ignition plug is loosely inserted. Fix the spark-plug connector properly. Operator
Fuel idling for a long time. Water or dirt in the fuel
system. Remove the old fuel in a suitable container in the
open (See "Engine Instruction Booklet"). Fill up
the tank with clean, fresh fuel. Operator
Ventilation hole in tank lid blocked. Clean tank lid and ventilation hole. Operator
Machine does not
clear snow Shearing bolts torn off. Replace shearing bolts (see "Replacing shearing
bolts"). Operator
Snail or discharge shaft is blocked. Stop the engine, pull out the ignition plug. Re-
move the blockage. Operator
Clutch tension for snail drive is not set properly. Set clutch tension (see "Setting clutch for snail
drive").
Operator
V-belt loose. Tighten V-Belt. Customer
Service
V-belt torn. Replace V-belt. Customer
Service
Machine does not
move Clutch tension for travel drive is not set properly. Adjust clutch tension (see "Setting the clutch for
travel drive").
Operator
V-Belt is loose or torn. Tighten the loose V-Belt. Replace torn V-Belt. Customer
Service
Friction wheel rubber is torn. Replace friction wheel rubber. Customer
Service
Excessive vibration Loose parts or damaged snail. Stop the engine immediately, pull out the ignition
plug. Tighten loose screws and nuts. Repair
damaged snail. Customer
Service
Gears can be
switched with great
difficulty Clutch tension for travel drive is not set properly. Adjust clutch tension (see "Setting the clutch for
travel drive").
Operator
Switching lever not adjusted properly. Check switching lever (see "Setting the switching
lever"). Operator
Information about engine
18 EN