25
MAN-88 – UK
Below are some common faults, their probable causes and suggested remedy.
FAULTS
PROBABLE CAUSE
REMEDY
When pulling the handle don’t start
the engine
Not turned on the “ON” position
the switch
Turned on the “ON” position the
switch
Bad connections cables
Check and restore
Cable wrongly in contact with
engine / chassis body
Check and restore
Bad H.T. coil connection or coil
failure
Check/Replace
Wet spark plug
Replace
Malfunction on fuel feed system
Check status and connections on
fuel pipe (including tank pescante)
Replace gaskets and membranes on
carburetor
The fuel don’t arrive to carburettor Check
the
carburettor
pipe
connections and replace the pipe if
necessary
Bad
carburettor
adjustment
(H screw)
Check carburettor adjustment (see
Sect. 5)
Breaking of starter rope
Replace rope
Rough idle
Bad carburettor adjustment
(L screw)
Check carburettor adjustment (see
Sect. 5)
Drop in engine performance
Bad compression
Check piston
Bad carburettor adjustment
Check carburettor adjustment (see
Sect. 5)
Insufficient fuel flow
Check fuel flow lines.
Dirty inlet silencer
Check and clean
Burning smell, clutch smoke
Overheating of clutch
Check clutch (Sect. 10-11)
Lubrificant accindentaly entered
into the clutch
Check clutch (Sect. 10-11)
Cluth engages at too high RPMs
Excessive wear of the clutch
Check clutch (Sect. 10-11)
Lubrificant accindentaly entered
into the clutch
Check clutch (Sect. 10-11)
Cluth engages at Too Low RPMs or
Clutch always engaged
Clutch body is deformed of failure
Check and replace (Sect. 10-11)
Clutch body disassembled, or
assembly no correct.
Check and replace if necessary
(Sect. 10-11)
Pullstart malfunction
Pawls / Springs failure
Check and replace
Rope failure
Check and replace
Damage Pulley
Check and replace
Recoil spring failure
Check and replace
Exhaust too noisy
Screws lost or bad tighten
Check and replace if necessary
Damaged exhaust muffler
17-
ENGINE PRESERVATION
