Stiga MP 84/98 - Page 20

WORKSHOP MANUAL
Map of functional units
MP 84/98 - MP 84/98 Hy
1. Engine and Tank
Problem Probable cause Solution
Starter motor does not
run
Low battery Recharge [7.9]
No starter relay contact Check [7.6]
Faulty connector and/or starter
motor failure
Check and/or replace [*]
The starter motor runs
but the engine does not
start
Blown spark plug electrode Replace the spark plugs [*]
Uncertain connections Check the connectors –
Coil failure Check and/or replace [*]
The carburettor solenoid valve
does not open
Check [*]
No fuel is pumped to the
carburettor
Check the lter, fuel pump (if applicable)
and the carburettor
[*]
The engine runs irregu-
larly and/or lacks power
Dense and/or blue ex-
haust fumes
Faulty ignition
Check the spark plugs and ignition
system
[*]
Low fuel level in the tank Top up –
Dirty or old fuel Empty the fuel tank and add fresh fuel –
Clogged carburettor lter Check and clean [*]
Black exhaust fumes Excessively oily carburetion Check the starter and command cable [*]
Engine overheating
Spark plugs with inadequate
heat rating
Check [*]
Carburetion problems Check the carburettor [*]
Insucient oil level Check and top up [*]
Clogged suction system
Check and clean the air lter and the
suction pipe
[*]
Dirty cooling aps Clean [*]
Broken cooling fan Replace [*]
Engine idling speed is
too high or too low.
Incorrect cable adjustment Adjust [6.8]
Abnormal noise and
vibrations
Loose bolts and screws
Check and tighten to the prescribed
values
[5.5]
[*] Check the engine Manufacturer’s Manual
General informations
This chapter helps achieve a rapid identication
and solution to the most recurrent problems, clas
sied according to the operating unit in question.
Related topics
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CHAPTER REVISION FROM ... PAGE
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TROUBLESHOOTING AND REMEDIES