29
Trouble shooting
Malfunction System
Observation Cause
Chain does not run
Chain brake
Engine runs
Chain brake actuated.
Engine does not start or
Ignition system
Ignition spark
Malfunction in fuel supply system, com-
only with difficulty
pression system, mechanical malfunction.
No ignition spark
Switch on STOP, fault or short-circuit in the
wiring, plug cap or spark plug defective.
Fuel supply
Fuel tank is filled
Combination switch in Choke position,
carburetor defective, suction head dirty, fuel
line bent or interrupted.
Compression
Inside
Cylinder base packing ring defective, radial
system
shaft packings defective, cylinder or piston
rings defective
Outside
Spark plug does not seal.
Mechanical
Starter does not engage Spring in starter broken, broken parts
malfunction
inside the engine.
Warm start difficulties
Carburetor
Fuel tank is filled
Wrong carburetor adjustment.
Ignition spark
Engine starts, but
Fuel supply
Fuel tank is filled
Wrong idling adjustment, suction head or
dies immediately
carburetor dirty.
Tank venting defective, fuel line interrupted,
cable defective, Combination switch defective
Insufficient power
Several systems
Engine is idling
Air filter dirty, wrong carburetor adjustment,
may be involved
muffler clogged, exhaust channel in cylinder
simultaneously
clogged, spark arrester screen clogged.
No chain lubrication
Oil tank/pump
No oil on the chain
Oil tank empty.
Oil guide groove dirty.
Oil-pump adjusting screw incorrectly adjusted.