I start the kohler generate 15 seconds he was down automatically what's the problem

SOURCE: kohler 12kw generator starts but shuts down after 3sec

Your gas pressure is too low and you may not have a large enough supply pipe. You need at least 10 inches of water column with the engine running to operate an LP vapor fueled engine. Because the engine is starving for fuel, its governor opens the throttle to WOT (so it goes to high revs) but there isn't any fuel to make horsepower with so the output voltage falls and the undervoltage alarm trips.

Carl

SOURCE: My Kohler Confidant IV generator starts and runs

Kohler generators feed the generated voltage back into the control circuit board to tell it to keep the fuel pump (electric) runing and the ignition on. IF there is no voltage generated (bad brushes or?) then the symptom you describe will occur. The motor runs fine, but it isn't generating electricity.
Jim Russell

Craig Butler

• 1730 Answers
• Posted on Aug 21, 2009

SOURCE: The generator starts up runs for about 15 seconds and shuts down.

Check the oil pressure switch



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SOURCE: kohler lp shuts down

What you need to know is there enough fuel going to the regulator. It should be 7 to 11 inches Water Column. If not your problem may be not enough fuel. That includes when the heater in your house kicks on and what ever gas appliance you may have. Once you verify that you need to figure out if you have the proper pressure coming out of the regular on the inside of the generator. Next I would look at compression of the cylinders. It may need new piston rings.

SOURCE: Kohler 12RES only starts on second try

Check gas pressure. Oc is over crank. Means tried to start but did not.