LEADTOCONTROLBOX
FIGURE
42.
JC
BATTERY IGNITION SYSTEM
WITH
AUTOMOTIVE DISTRIBUTOR
To adjust the breaker points, remove the distributor
cap and rotor. Rotate the crankshaft to get maximum
breaker gap. The gap should be between
.018
inch
and .022 inch. At the same time, inspect the points for
dirt or pitting. Dirty points can be cleaned with tape
and solvent.
If
the points are excessively pitted, they
must be replaced. See Figure 43.
Check the distributor cap for cracks, carbon runners,
corroded high tension terminals or excessively-
burned inserts.
STAT1
ON
ARY
M
RUBBING
FIGURE
43.
SETTING BREAKER POINTS
Timing:
The JC ignition system may be timed either
with the engine stopped or running. Before timing the
ignition, be sure the breaker points are clean and
properly adjusted. Set the timing at 25"BTC (run-
ning) of each compression stroke
(35"
BTC for gas-
eous fuel or combination gasoline-gaseous fuels).
Timing Procedure, Engine Stopped:
1.
Disconnect low voltage lead to distributor and
connect a test lamp and battery
so
lamp lights
when breaker points are closed.
2.
Remove spark plug from
#1
cylinder and rotate
flywheel clockwise until air is forced out of spark
plug hole.
3.
Continue rotating flywheel slowly until test lamp
goes out, indicating that breaker points have
opened. If TC mark on flywheel and ignition
timing pointer are aligned, timing is correct.
4. To adjust timing, align flywheel TC mark and
timing pointer. Loosen distributor body and
rotate it (clockwise
if
ignition occurred early and
counterclockwise
if
late), until light goes out.
Tighten distributor body in new position and
check timing, step 3.
If
timing still does not occur
at correct point, repeat step 4.
Timing, Engine Running:
1.
Remove access door and
install an automotive
timing light on spark plug for cylinder
#l.
Run
engine at rated speed. Aim flashing timing light in
through access door opening and toward
flywheel.
Do
not run the engine for more than a minute
rn
or two with the access door open
or
removed.
The engine overheats rapidly and can damage itself. Run without
load.
2.
The timing pointer on gear cover must indicate
25" BTC. To adjust timing, loosen distributor
body clamp and rotate distributor body.
If
timing
is
early
(25"
mark to the right of the point), rotate
distributor clockwise to retard ignition point.
34
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by any means, is strictly prohibited.
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