Kohler K91 Owner's Manual page 200

Step 2: Unplug the magneto wire from the engine and
try starting.
A .
If the unit starts continue on to
Step
3 .
i
NOTE - Remember
you will have to
reconnect the magneto wire
to kill the engine.
B .
If it doesn't start, the problem is
with the engine, not the wiring
harness.
1. Check the engine for spark
-
if
spark, there is some carburetor
or mechanical problem.
2.
If no spark
-
check breaker
points and magneto.
Fig.
42