Ignition
System
The engine
is
equipped with an automotive type bat-
tery ignition system. Both spark plugs fire simultane-
ously, thus the need for a distributor is eliminated.
The major components of the ignition system are: the
spark plugs, coil, breaker points and condenser. The
MCCK ignition system is shielded to prevent radio
interference.
IGNITION
COIL
To test primary and secondary windings within the
ignition coil proceed as follows:
1. Use a Simpson 260
VOM
or equivalent.
2.
Place black lead on ground (-)terminal of coil and
red lead to positive
(+)
terminal. Primary resist-
ance should read:
RCCK 3.87-4.73 ohms
MCCK
1
.OO--1.10 ohms.
3.
Change resistance setting on ohmmeter. Place
ohmmeter leads inside of spark plug cable holes
(Figure 14). Secondary resistance should read:
RCCK 12,600-15,400 ohms
MCCK 10,800-13,200 ohms.
c
OHMMETER
FIGURE 14. TESTING IGNITION COIL
4. If any of the above conditions are not met, replace
coil. Refer to
PARTS CATALOG
for correct part
number.
BREAKER
POINTS
The timing is adjusted during initial engine assembly
and is fixed bythe point gap adjustment.
To
maintain
maximum engine efficiency, change the breaker
points every
200
hours of operation.
1.
Remove two screws and cover on breaker box.
2.
Remove both spark plugsso engine can beeasily
rotated by hand.
If
plugs have not been changed
within last
100
hours, replacethem with new ones
after setting breaker points.
3.
4.
5.
6.
Removetwo mounting screws
(A)
and pull points
out
of
box just far enough
so
screw
B
can be
removed. See Figure
15.
Replace points with a
new set but do not completely tighten mounting
screws
(A).
Rotate crankshaft clockwise (facing flywheel) by
hand until points are fully open. Turn screw
(C)
until point gap measures 0.020 inch (0.51 mm)
with a flat thickness gauge.
lighten mounting screws and recheck gap.
Proceed to
lgnition
Timing.
Each time new breaker points are installed, placea drop
of
oil
on the breaker
arm
pivot.
*
PLACE DROP
OF
OIL ON PIVOT POINT
WHENEVER NEW POINTS ARE
INSTALLED.
REFERENCE MARK)’ ’LOOSEN SCREWS
AP-.P_ROXIMATE TIMING
20
ADVAVCE
OR--
FOR
-AND
SHIFT
BOX-
---
FIGURE
15.
IGNITION TIMING
IGNITION TIMING
Ignition Timing
-
Engine Running
Always check timing after replacing ignition points or
if noticing poor engine performance. Proceed as
follows:
1.
To
check ignition timing accurately, use a timing
light when engine is running. Connect timing
light according to manufacturer’s instructions.
Either spark plug can be used as they fire simul-
taneously.
28
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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