Table of Contents
Advertisement
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Do not arc spark plug wire to
ground. Connect to a known good
spark plug and ground plug to a
clean metal surface (muffler, cylinder, etc.). Perma-
nent damage may be caused to the coil or igniter if
the plug is not grounded properly.
If the engine will not run, but the starter will turn the
engine, proceed as follows:
1.
Check for loose terminals, wires and connections.
2.
Check for an electrical discharge through the spark
plug wire as follows:
a. Use a spark plug that is known good, and with a
spark plug installed in the cylinder, place the
spark plug on a clean grounded engine surface,
(muffler, cylinder, etc.).
b. Turn the engine over with the starter.
c. Look for a blue electrical arc at the spark plug
electrode.
4.
If there is either a weak arc or no arc, try a new spark
plug, then check the condition and the tightness of
the spark plug wire. Check plug wires by substituting
them with good ones.
5.
Replace the plug if necessary. Gap the spark plug
.028" - .030" (.71 - .76 mm) using a wire type spark
plug gauge.
Testing the Magneto
Set the meter to the ohms scale and measure the resis-
tance as shown in the following illustrations:
•
A normal reading with the negative lead on A and the
positive lead on B would be 2 - 18 K.
•
A normal reading with the negative lead on A and the
positive lead on C would be 2 - 18 K.
•
A normal reading with the negative lead on B and the
positive lead on A would be
•
A normal reading with the negative lead on B and
the positive lead on A would be
•
A normal reading with the negative lead on C and the
positive lead on A would be 2 - 18 K.
•
A normal reading with the negative lead on C and the
positive lead on B would be 10 - 30 K.
If readings obtained are out of the above ranges, replace
the magneto.
653045
.
.
Repair and Service Manual
B
- TEST LEAD
Fig. 2 Resistance Between A - B and A - C
B
- TEST LEAD
+ TEST LEAD
Fig. 3 Resistance Between B - A and B - C
ELECTRICAL
+ TEST LEAD
C
A
C
A
B
135
Advertisement
Table of Contents
