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Re: Problem with a Kohler 12 Horse

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Posted by Jim S. on May 16, 2003 at 07:47:47 from (

In Reply to: Problem with a Kohler 12 Horse posted by Red Dave on May 14, 2003 at 18:34:37:

Here's the fuel drill:

1.) Remove fuel line
2.) Open valve
3.) If gas runs out line strongly, yer OK to there,
replace line
4.) Start engine and squirt gas in carb, as
explained before. If it runs OK that way, you
have a blocked carb inlet or main jet.

Electrical checks:

1.) Check point gap.
2.) Be certain points are NOT dirty
3.) Did you for some reason remove the wires
from coil? If so, wire to + terminal is the one
from the switch. Wire to - terminal goes to
points. If you reverse them, you will get these
4.) A condenser can quit after it gets warm,
gets a short and quits. But you swapped that.
5.) REPLACE THE PLUG WIRE. You can get
singles at places like O'Reilyy's Auto Parts for
$4 that will work with Kohlers. Frequently
overlooked. If you are getting shorts in the
wire, raw gas enters the muffler and it will

Could also be a sticking exhaust valve.
Suspect that especially if it runs good til it
warms up. The valve sticks, that kills the
engine, raw gas is pumped directly into the
muffler and it backfires. Classic sticky exhaust
valve symptom. To fix, remove valves, clean
stem and guides of both, inspect valve seat
and valve unbrella for wear. If they are OK,
relap valves, reinstall, reset lash, replace
cover and head and all, and go.

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