Honda C65 - Spark Advancer; Flywheel Generator Troubleshooting

72
5. ELECTRICAL SYSTEM
4. TROUBLE DIAGNOS I G THE FL YW EE GENERATOR
Sympton
I
Hard
Starting
Low int ensity
of lamps
Lamp
not
lit
Battery
discharges
Inspection Procedure
( ll Hard s tarting
Loca;·or
A Spa·
:::: ..;g
B. Brea ' e·
c.
1>;-' ~g
::>.Coil
E. Rotor
F. Lamp
G. Wiring
H.
L
am p coil
I. Rotor
J. Battery
K. Lamp
L.
Wiring
M . C harging coi l
N .
Se lenium
rectifier
0. Wiring
P.
Rotor
I
Probable cause Corrective action
::>i:-
or foul ed plug
Clean or replace
-
oo wid e a gap
Adjust or r eplace
Dirty o r burnt points
Repa ir or replace
Punct ured con denser
Rep lace
Too far advanced
Ad ju st
Primary winding opened
Replace
Secondary winding opened, shorted
between Replace
la yers, defective insulation
P in-hole in high tension cord
Replace
Lo
ss of magnetism Replace
Too large a rati ng Repl ace
Poor contact
Repair
Poor connection Repair
Poor contact in lighting switch
Replace
Shorted across the
layers
Replace
Loss of magnetism
Rep l ace
Discharged
Recharge
or
replace
Poor terminal con ta ct
Repair
Burnt
filament
Replace
Bro ken wire
Repair
P oor c ont act in lighting
switch
Replace
---- --
Open coil wi nding
Replace
Punctur ed condenser
Replace
Broken
wire, poor connect ion
Repair
Lo
ss of magnet ism
Replace
Open coi l winding
Replace
First
conduct the s park performance test in section 4 (1 I and check to see that the condition of the spark
plug is satisfactory; perform the starting operat ion 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, ignit i on coil and flywheel A.C. generator.
(21 W h enever there is any malfu nction of the lamps or the battery system, first check for poor wiring connection
or grounding. Next, start the engine and measure the vo ltage at the output terminals. If the output vo l tage
are normal, check the battery and the lighting system for troub le.
5.4
Spark advancer
S65
065
Figure 5- 13. Sp ar~ advancer
SPARK ADVANCER
The C50M, C65M u se the battery as a source of
power and produces the high voltage spark across the
plug
gap with the ignit i on coil and ' contact breaker.
However, a good strong spark is of little value unle ss
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 charac teri st ic 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 RP M