Question about Kohler 17RESL 17 kW Generator with 200 Amp ATS

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I have a 17 k kohler natural gas generator and it will not stay running. even when i put it in manual mode it will start then shut down within 4 seconds

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Check fuel pressure, oil pressure switch, AC output from stator, check rotor and diodes

Posted on Nov 22, 2013

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CarlGehrke
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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

Posted on Dec 03, 2008

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I have a Kohler Confidant 5, model 5ckm61 generator in my RV, serial # 338225, spec# 101218. It worked fine one evening and the next day it wouldnt stay started unless the start button stays depressed ....


The control board needs to sense a voltage coming of stator windings to complete the run circuit or else it will shut down. Check the stator and rotor windings for resistance and shorts

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1 Answer

Surging


It definately sounds like a fuel problem, lack of fuel..I assume it is running on LP or natural gas. The hose running from the demand regulator goes to the carburetor/mixer. When it gets to the carburetor, there is an adjustable main jet. It is different on different models, but is usually easy to find. There is probably a screw slot in the end of the screw head and a spring under the head. Start it up after locating the screw and open the jet just enough to even out the running. It was factory set, but barometric pressure and altitude and different fuels in different areas will decessitate different settings.
Please let me know if this fixes your problem, Robert

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If you have a drip leg near generator open that up for a sec and then try it again.

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How big a unit? Model number? Alarm codes? If it runs for 5 mins check the obvious, coolant level, oil pressure and sensor,

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Is there a fault?? All UL listed generators including Kohler are required to lockout on a fault on shut down. This really sounds like a problem with your 2-wire auto start connection between your automatic transfer switch and genset. RDT model automatic transfer switch it is the 2 middle wires on the green connector and terminals 3&4 in the generator. close to run and open to shut down. Any open at any time will cause the unit to shut down. The 12 will shut down instantly upon an open because your 5 minute cool down is built into the transfer switch.

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A few things to take a look at:

1) Oil level / pressure sending unit. This is normally bypassed as long as the start switch is pressed. When engine starts, and switch is released, engine will die if sending unit is defective, or you are low on oil.

2) Exhaust temperature sensors. Older units were notorious for burning these up.

3) Cooling Water Temperature sensor. These cause trouble often, but mostly due to water pump impeller being eaten away by galvanic action and not able to pump water as effecively. End result is water temp higher than normal, which trips the switch, which kills the engine.

4) Alternator (generator) output not as it should. If output doesn't rise to proper level within a few seconds of engine start, the engine will be shut down.

5) Choke not working as it should

6) Bad fuel, bad fuel pump, clogged fuel filter.

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i got the same gen and with the same problem
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First thing is to check oil level as low oil pressure will shut it down.

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