Service manual

Overheated
engine
-
Engine
runs but
Poor
RPM’s
__
,
- Inadequate fuel used .................. Use specified fuel
- Defective plug (overheated) ............ Replace
Air ventilation hampered because
(Inlet of cooling air, fan cover,
fan, cylinder fin)
chamber
............................ Overhaul, clean
- of cylinder clogged with dust ............ Clean
- Carbon adhering to combustion
- Fuel is too lean ...................... Overhaul, clean
- Too much load to cutter blade ........... Lessen load
Defective
function adjust
Damaged or fouled spark plug
or inadequate spark gap
............... Replace, clean,
-ignition
Irregular adjustment of low-speed
fuel adjusting screws
................. Adjust
Clean
Overflow
........................... Refer to indication
in previous page.
Fouled air cleaner
.................... Clean
Damaged diaphragm membrane Replace
- Defective
Carburetor
.........
Ineffective compression ................ Overhaul, check
(Insufficient tightening of spark plug)
...... Retighten
Exhaust port clogged with carbon
........ Clean
Throffle valve not fully opened
........... Open fully
(mis-contact and wear of piston ring)
(gas leakage from cylinder and crankcase)
and replace
r Clogged tank filter Replace
-Other causes
....................
Polished cutter blade .............
Blade does not
cut well
-
Polish correctly
I Slippage of cutter blade ................ Tighten correctly
Worn or damage rod shaft hole
.......... Replace
c Worn blade-fixing screw Replace
-Blade fluctuates
____-
...............
Excessive load on cutter blade .......... Lessen load
Worn clutch shoe ..................... Overhaul, replace
Excessive tightened blade fixing screw
.... Mount correctly
Damaged small gear
or crankgear Replace
-Blade stops
___ F
t .......
Damage centrifugal clutch .............. Replace
Damage drum
....................... Replace
Damage small gear on crankgear
........ Replace
Replace
i Damaged blade rod shaft
- Blade cannot
be actuated
..............
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