Kohler K91 Service Manual page 73

NOTE: The preceding step is for timing lights using
an alligator clip to connect to the spark plug. If the
light in use has a sharp prong on the spark plug
lead , sim ply penetrate the rubber boot with the
prong and make contact with the spark plug lead
metal connector.
3 . Connect one timing light lead to the wire
wrapped around the spark plug terminal .
4 . Connect one timing light lead t o the hot (un­
grounded) terminal of the battery.
5 . Connect t h e third timing light lead t o engine
groun d .
6 . Start the engine and run i t at 1 200 t o 1 800
RPM .
7 . A i m t h e timing light a t t h e timing sight hole .
The light should flash just as the S or SP mark
is centered in the sight hole or is in line with
the center mark on the bearing plate or blower
housing.
8.
I f timing i s not as specified, carefully remove the
breaker point cover and slightly loosen the gap ad­
justing screw, shift the breaker point plate until the
timing mark is properly positioned, and tighten the
screw.
9 . Shut off the engine and replace the breaker
point cover.
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PR I MARY C I RC U I T
S E C O N D A R Y C I RCU I T
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BATTERY
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Figure Wiring Diagram - Battery Ignition System.
8-3.
Battery Ignition System Operation
The battery ignition system operates in a manner
similar to the magneto system . The major differ­
ence is that, in the battery system , energy is pro­
vided by a battery. The battery is maintained at
full charge by an engine mounted motor-generator
or alternator.
The coil in a battery ignition system is connected
as follows. Refer to Figure 8-3 .
The positive (+) terminal is connected to the posi­
tive terminal of the battery.
The negative (-) terminal is connected to the
breaker points .
The high tension (center) terminal is connected to
the spark plug .
Battery Ignition System Timing
The timing procedure for the battery ignition sys­
tem is the same as for the magneto system .
When using a timing light , refer to the manufactur­
er's instructions.
NOTE : The Model K34 1 QS Specification 7 1 276A
engine is unique in that it is timed slightly differ­
ently than other K series engines . These engines
operate at lower speed , so the timing is set at 1 6
degrees before top dead center to improve run­
ning smoothness . I nstead of having an S or SP at
the timing mark on the flywheel , these engines
have a 1 above and a 6 below the mark . When
timing these engines , the timing mark is centered
as with other engines .
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8 . 3