17TS 410, TS 420
4.6 Engine
Always check and, if necessary,
repair the following parts before
looking for faults on the engine:
- Air filter
- Fuel supply
- Carburetor
- Ignition system
Problem Cause Remedy
Engine does not start easily, stalls
at idle speed but operates normally
at full throttle
Oil seals in crankgear damaged Replace oil seals
Crankcase leaking or damaged
(cracks)
Seal /replace crankcase
Engine does not deliver full power
or runs erratically
Piston rings worn or broken Replace piston rings
Muffler / spark arresting screen
carbonized
Clean muffler (inlet and outlet
openings), replace spark arresting
screen, replace muffler if necessary
Air filter dirty Replace air filter
Fuel/impulse hose severely bent,
kinked or damaged
Fit new lines and ensure they are
installed without kinking
Tank vent faulty Check tank vent and replace if
necessary
Air valve does not open Check air valve, adjust or replace if
necessary
Decompression valve does not
close
Replace decompression valve
Engine overheating Insufficient cylinder cooling.
Air inlet openings in fan cover
clogged or cooling fins on cylinder
severely fouled.
Thoroughly clean all cooling air
openings and the cylinder fins.
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