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Kohler genset fuel issue

GAS engine, transmission and generator repair and maintenance discussion forum.
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bpritchett
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Kohler genset fuel issue

Postby bpritchett » September 9th, 2019, 9:24 am

Have a 1980s Kohler 7.5R27 that i suspect has a fuel pump issue. It will start and run sometimes if it has been sitting for a while, as you add load it has a tendency to die when it needs more fuel and wont start back up until it sits for a while. The pump does have the manual priming lever. Has anyone replaced this manual pump with an electronic pump? If so what model did you use? Has three fuel lines on existing pump.
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Re: Kohler genset fuel issue

Postby km1125 » September 9th, 2019, 11:19 am

Might check/replace the anti-siphon valve first, as it's an easy and cheap fix and usually needs to be addressed at some point anyways.
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Re: Kohler genset fuel issue

Postby bpritchett » September 9th, 2019, 1:14 pm

Thanks, Would the anti siphon valve just be in line of the inlet hose at the entry to the fuel pump or at the tank?
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Re: Kohler genset fuel issue

Postby bud37 » September 9th, 2019, 1:31 pm

If you have one it should be at the tank fitting......
FWIW.....The above is just my opinion..... :popcorn:
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Re: Kohler genset fuel issue

Postby buster53 » September 9th, 2019, 7:05 pm

Yes, do check your anti siphon valve. I was having problems with my genset and that took care of it. Also, have you checked/replaced your fuel filter?
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Re: Kohler genset fuel issue

Postby Keith S » September 21st, 2019, 2:21 pm

When you suspect a fuel supply problem, use an outboard fuel tank with a primer bulb. This way you eliminate the boat fuel system and the fuel pump as issues. As I'm sure you already know the carb and fuel pump are no longer available from Kohler. However they did issue a service bulletin (TT-1557) about replacing the fuel pump with an electric pump. If you get to that point, let me know and I can send you a PDF of it.
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