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Old 11-10-2006, 02:21 PM   #1
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have a kohler 4kw with a no start, have spark, tried auxillary fuel(to eliminate fuel system problem)no start. changed plugs, no start, has voltage to fuel pump,choke,pre-heater, disabled low oil pressure shut down, no start yet. Have pretty much narrowed it down to stator or regulator. Have two lights and an occasional third light behind controller panel during crank HELP! fuse are all good
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Old 11-10-2006, 02:21 PM   #2
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have a kohler 4kw with a no start, have spark, tried auxillary fuel(to eliminate fuel system problem)no start. changed plugs, no start, has voltage to fuel pump,choke,pre-heater, disabled low oil pressure shut down, no start yet. Have pretty much narrowed it down to stator or regulator. Have two lights and an occasional third light behind controller panel during crank HELP! fuse are all good
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Old 11-10-2006, 06:52 PM   #3
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Well, the old saw about "air fuel and spark applies. If you are sure its getting spark and fuel, could the air intake be clogged somehow?

Did you test for a good spark or just change the plugs? A new spark plug is still no good if a nice hot spark isn't coming up the plug wire...
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Old 11-10-2006, 07:18 PM   #4
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Welcome crazy jim to irv2.
Hows your house batteries, does the starter crank, did you check your ground wires from GEN & batteries to frame of chassis?
Let us know how your making out.
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Old 11-10-2006, 09:27 PM   #5
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I'm baffled by that too, I'm retired military, was a mechanic and always swore by: if you have fuel and spark at the right time it has to run. The spark is there (not the bluest in the world) The fuel added was carb cleaner/WD40 which was introduced directly into the induction system, which should have by all means ignited. The generator had the same problem when new, the stator was replaced and it worked fine (10 years ago). I guess a wire corrodes and when the start is released the spark stops. It has now been diagnosed as a bad carburator, but I have my doubts, I'm not a kohler mechanic, but the unit has less than 60 hours on it.
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Old 11-11-2006, 02:00 AM   #6
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Jim, when you do get it running, run it every month for a couple of hours and a good load on it. You should have a lot more than 60 hours on a 10 year old generator. The carburator may not be the only problem but the fuel could have evaporated and varnished up the needle and seat area when it cannot get fueled properly. If you must store it put Stabil in the fuel and run the generator to get that mixture into the carberator bowl. Good luck and keep us posted.
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Old 11-11-2006, 04:37 AM   #7
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This may not be right. On my Onan, if the generator did not synchronize with the electrical (60 HZ), then it would shut itself down. My issue was always a stuck brush (from road dirt). Once I freed the brush, the system started and stayed running. I had the same issue with it stopping after release of the starter button.
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Old 11-11-2006, 05:58 AM   #8
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The very low hours suggests that the carb is indeed varnished up from lack of use. That is effectively a lack of fuel and/or air in the engine, since the carb is not properly mixing air and fuel to get a combustible charge into the cylinder. Rebuild or replace the carb and I'll bet your problems will be over.
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Old 11-11-2006, 08:48 AM   #9
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I'm still waiting on the carburetor rebuild. I have started and run the generator every month since new, but only about 20 to 30 minutes. It was running fine, just used it the AM before it died four hours later. Thanks for all the info, hopefully next week I'll have my coach back(with an operational generator) my pocket book will probably be $600.00 lighter though!
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Old 11-11-2006, 03:40 PM   #10
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">It was running fine, just used it the AM before it died four hours later. </div></BLOCKQUOTE>

It was running when it died? If it quit while it was running, that's a different symptom than "won't start after having been shut down for awhile".
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Old 11-12-2006, 07:49 AM   #11
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Yes, it was running for about two hours earlier in the day, I restarted it later in the day to use the micro wave, by the time I got back to the micro wave, the generator had quit.
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Old 11-13-2006, 07:22 PM   #12
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Most small engines have a magneto ignition on the flywheel for spark. If the key holding the flywheel shears and the flywheel spins on the crankshaft any at all it allows the flywheel magnet to create the spark at the wrong time.
FWIW, carburetor cleaner is not a fuel. It will stop an engine without gasoline or substitute fuel.
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Old 11-16-2006, 05:55 PM   #13
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Hi,Thr carb cleaner will start the genset.If spark was off, then would have backfire from carb. or ext. I'd say electric fuel pump or... Check wiring to see if any mice have been chewing on it.Mine started but when I releaced teh start button it stopped. came to find out that the mice had chewed on my harnas to the inside remote panel. unplugged it and the thing started up and ran like new. Lesson learned!
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Old 11-17-2006, 09:56 AM   #14
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Capt Dan, at least someone understands the purpose of the carb cleaner(auxillary fuel) I too feel it is elctrical, by the way I'm still waiting for the carb to be rebuilt???
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