Hayter Harrier 56 340S Owner's Handbook Manual page 39

1.37
FAULT FINDING
PROBLEM
Engine will not start
Engine runs rough
Engine vibrates excessively
FAULT FINDING
Continued.
POSSIBLE FAULT
Engine under load
Fuel starvation
Engine cold
Incorrect/contaminated fuel
Spark plug lead disconnected Connect spark plug lead
Throttle setting incorrect
Engine brake not released
Faulty spark plug
Battery discharged
(electric start models)
Wiring fault
(electric start models)
Spark plug lead becoming
disconnected in use
Faulty spark plug
Air cleaner blocked
Incorrect/contaminated fuel
Mounting bolts loose
Cutterbar bolt loose
Cutterbar out of balance
Bent crankshaft
REMEDY
Raise height of cut
Fill fuel tank
Set throttle to 'choke' position
Drain fuel tank and fill with
correct fuel
Set throttle to 'fast' position
Operate engine brake lever
Clean and adjust gap or replace
Charge battery
Check wiring
Connect spark plug lead
Clean and adjust gap or replace
Service air cleaner
Drain fuel tank and fill with
correct fuel
Tighten bolts
Tighten bolt
Balance cutterbar
Consult your dealer
340222MT270999A
1.37