Electrical Troubleshooting - Honda P-50 Shop Manual

Tro uble
Engine will not s tart
· No spark at the plug
·Weak spark
Engine will not increase
in speed
Excessive engine speed
Fire emitted from
muffler
Br~e~k~r
point s
ree~uily
burns
Horn inoperative
Stop lamp defective
Head light bulb
filament burned
Head light defec tive
( also same for tail
light)
Light beam cen t er dark
Lens and reflector
clouded
Electrical Trouble Shooting
Probable cause
1. Spark plug improperly installed
2.
Plug electrode dirty or eroded
3.
Plug gap too wide
4. Dirty breaker point
5.
Improper ignit ion t iming
6.
Defective condenser
7.
Decrease of magnetic force in the flywheel
magneto
8.
Defective primary coil
9.
Leaky high tension cord
10. Defective ignition coil
1 1. Insulation failure in ignition coi l
1.
Improper ignition timing
2.
Defective plug ( wet )
3 . Defective governor
Defective governor
1. Too rich a fuel mixture
2.
Excessive carbon deposi t
1. Poin ts covered with oil
2.
Improper point gap
3. Improper ignition t iming
4 . Condenser internally shorted
5.
Improper capacity condenser
1. Open connection
2. Defective horn switch contact
3. Defective light switch contact
4. Defective horn
l.
Broken bulb filament, connector unplugged
2.
Defective stop switch contact
3.
De fec tive lighting swi tch contact
1. Open tail light circuit causing excessive
voltage
1. Bulb f ilamen t broken, connector unplugged
2. Poor socket contact. burned contacts
3. De fect ive light ing switch contact
4.
Loss of magnetism in A. C. generator
5. A. C. generator lamp coil defective
Improper bulb installation
1. Fogged
2. Ous t
83
Corre ctive action
1. Reinstall
2.
Clean or replace
3.
Repair or replace
4. Repair or replace
5.
Adjust
6.
Replace
7. Replace
8.
Replace
9.
Replace
10. Replace
1 1. Repair
1. Adjust
2 .
Clean or r eplace
3 . Repair or replace
Repair or replace
1. Adjust
carbure t or
and clean plug or
rep lace.
Refer to section 6
tor spark plug check
1.
Cfee~u
2.
Ad just
3.
Adjust
4.
Replace
5.
Replace
2. Repair or rep lace
3. Repair or replace
4. Repair or replace
1. Repair or replace
2 . Repair
3. Repair or rep lace
1. Repair by r aising the
ccn tact
2.
Replace
3. Repair or replace
4 . Remagnetize or
re:>lece
5. Replace
Adjust focus
Clean t he lens and reflec-
1
tor surface ( after remov
ing socket)