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coleman generator

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frank h
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2016/08/27 15:33:36 (permalink)
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coleman generator

I have a small generator with a B&S engine. It only runs with choke. All the carb passages are clear and gas supply is ok. There's no air leaks that I can find. Compression is only 55#. I filed the valve stems a bit to give some valve lash, .009, and lapped the valves.  I put on a new head gasket, but compression remains low. The cylinder is not scored. Do you think there's low compression due to ring wear? Why would this cause it to run only with choke on?
Thanks
Frank

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    Pathassett
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    Re: coleman generator 2016/08/29 01:35:35 (permalink)
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    Sounds like you might still have a jet plugged in the carburetor. Does this one have a fuel pump. Another thing could be a plugged breather in the gas cap creating a vacuum. But most likely still a plugged jet.
    frank h
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    Re: coleman generator 2016/08/29 07:16:43 (permalink)
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    no fuel pump. I will check the carb again.
    Pathassett
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    Re: coleman generator 2016/08/29 16:19:20 (permalink)
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    Which engine do you have?
    frank h
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    Re: coleman generator 2016/08/29 18:52:58 (permalink)
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    model 091412, type 0130 E1, code 031027YA
    Pathassett
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    Re: coleman generator 2016/08/30 04:26:19 (permalink)
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    Make sure the ports on the float bowl retaining screw are good and clean with a paper clip and the center jet up were the float bowl bolt screws in.
    frank h
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    Re: coleman generator 2016/08/30 11:46:02 (permalink)
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    I took the carb back off and recleaned it. I am positive all the passages are now clear. I put it back together and it still only runs with 75% choke. I tried opening the choke as much as possible...just before stalling. If I spray some starter fluid around the back area of the carb, it will help the motor run smoother. So, I thought there was an air leak. But , if it  runs with choke,it means it has more air than it can use. Still indicates a lack of fuel. I'm stumped.
    post edited by frank h - 2016/08/30 12:17:02
    Pathassett
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    Re: coleman generator 2016/08/30 13:10:49 (permalink)
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    If you have that much air going by the throttle shaft then the carb is worn out. You can get a new one for@$60.00
    frank h
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    Re: coleman generator 2016/08/30 18:55:50 (permalink)
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    I finely conclusively found out what was up. I wrapped some teflon around the throttle shaft and it ran fine. I would never have guessed that enough air could pass through this area to make that big a difference. I see on the parts schematic that there is some sort of bushing that acts as a seal...it's gone. Thanks for the help.
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