Stiga MP 84/98 - Page 66

WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
CHAPTER REVISION FROM ... PAGE
7.1 0 2018 2 of 3
TROUBLESHOOTING OF THE ELECTRICAL
SYSTEM
PROBLEM CAUSE REMEDY
3. The pilot lamp comes on but, with the
key in the «START» position, the starter
motor does not turn or lacks power
(poor starting)
The battery is not supplying sucient current Recharge the battery
Badly earthed battery, or the starter relay or engine not
earthed
Check and put right
Starter relay is faulty Check that the starter relay is activated
4. The pilot lamp is ashing with the key
in the «START» position and the starter
motor does not turn
Starting not permitted
After checking that the conditions are met, check all the micros-
witches and the
relative wiring
5. The starter turns but the engine does
not start
No fuel owa
Check the leads for the carburettor solenoid valve opening con-
trol (if provided) or check the fuel stopcock and lter
Impaired starter system
Check that the spark plug cap is positioned correctly
Check that the spark plug electrodes are clean and have the
correct gap
6. The starter continues to turn after
engine has started, and does not stop
when the key is removed
Mechanical diculties with the contact breakers of the
starter relay
Replace the starter relay
Starter works erratically for mechanical or electrical
reasons taking excessive current and causing binding
of relay contacts
Check the starter
7. The starter operates as soon as the
key is in the «ON» position, and can be
turned o only by removing the key
Fault in the card Replace the card
Starter block operating faults Replace the block
8. The pilot lamp becomes weak after sev-
eral hours’ work and the engine goes o
Insucient charge
Check that the charging cable has not detached
Check that there are no current leakages caused by cables with
damaged insulation
Check the recharge circuit
Charger fuse blown Replace fuse (25 A) and check the recharge circuit
IMPORTANT Faulty electronic cards must always be replaced without trying to repair them or re place single components.