Spark Advancer; Flywheel Generator Troubleshooting - Honda C50 Shop Manual

72
5.
ELECTRICAL SYSTEM
4.
TROUBLE DIAGNOSI G THE FL YW EE GENERATOR
Sympton
I
Hard
Starti ng
Low intensity
of lamps
Lamp not
lit
Battery
discharges
Inspection Procedure
( ll
Hard starting
Loca;·or
A Spa· :::: ..;g
B. Brea' e·
c.
1>;-' ~g
::>.Coil
E.
Rotor
F. Lamp
G.
Wiring
H .
Lamp coil
I.
Rotor
J.
Battery
K. Lamp
L. Wiring
M . Charging coi l
N . Selenium
rectifier
0.
Wiring
P. Rotor
I
Probable cause Corrective action
::>i:-
or foul ed plug
Clean or replace
-
oo wide a gap
Adjust or r eplace
Dirty o r burnt points
Repa ir or replace
Punctured cond enser Rep lace
Too far advanced Ad just
Primary winding opened Replace
Secondary winding opened, shorted between Replace
layers, defective insulation
Pin-hole in high tension cord
Replace
Loss of magnetism Replace
Too large a rati ng Replace
Poor contact Repair
Poor connection Repair
Poor contact in lighting switch Replace
Shorted across the layers
Replace
Loss of magnetism
Replace
Discharged
Recharge or
replace
Poor terminal contact
Repai r
Burnt filament
Replace
Broken wire
Repair
Poor contact in lighting switch
Replace
- - - -- -
Open coil wi nding
Replace
Punctured condenser
Replace
Broken wire, poor connection
Repair
Loss of magnetism
Replace
Open coi l winding
Replace
First conduct the spark performance test in section 4 (1
I
and check to see that the condition of the spark
plug is satisfactory; perform the starting operation and if a good spark is produced at the plug gap, it indicates
that the ignition coil, magnet and breaker are all in satisfactory condition. The fault can be assumed to be in
the timing. When no spark is produced, check the breaker, ignition coil and flywheel
A.C.
generator.
(21 W henever there is any malfunction of the lamps or the battery system, first check for poor wiring connection
or grounding. Next, start the engine and measure the voltage at the output terminals. If the output vo ltage
are normal, check the battery and the lighting system for troub le.
5.4
Spark advancer
S65
065
Figure 5- 13. Spar~ advancer
SPARK ADVANCER
The C50M, C65M use the battery as a source of
power and produces the high voltage spark across the
plug gap w ith the ignition coil and ' contact breaker.
However, a good strong spark is of little value unless
the sparking is timed to the engine's requirement.
For this purpose, a spark advancer is incorporated to
automatica lly regulate the ignition timing. The spark
advance characteri stic is shown in Fig 5. 14.
(Fig. 5-13, 5-14)
Perf ormance and Specification
Spark Advancer
(])
(21
Direction of rotation :
Mechanically allowable maximum
Left hand
RPM:
15,000 RPM