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Hot!5HP briggs won't throttle up

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antill81
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2016/09/16 06:59:11 (permalink)
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5HP briggs won't throttle up

I have a craftsman chipper shredder with a briggs 5HP engine. when using the other day I put a limb in it the engine bogged down and never came back. I took carb off and cleaned, it was dirty. cleaned air filter and checked spark plug. started back up and same thing, thought maybe carb was clogged again. took off and cleaned again but was not clogged this time. put back together and still same thing. Engine runs good doesn't miss, surge, or backfire it just wont rev up stays at low idle now matter what i adjust. haven no clue what to look at next. Thanks in advance.

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    Mikel1
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    Re: 5HP briggs won't throttle up 2016/09/16 17:30:13 (permalink)
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    Governor spring still there?
    antill81
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    Re: 5HP briggs won't throttle up 2016/09/16 20:50:21 (permalink)
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    Yes it is. Everything appears to be there and working.
    Mikel1
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    Re: 5HP briggs won't throttle up 2016/09/16 23:00:01 (permalink)
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    Does it speed up if you open throttle up on carb?
    What are model numbers on the Briggs engine?
    antill81
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    Re: 5HP briggs won't throttle up 2016/09/17 18:49:35 (permalink)
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    No. Just runs at a steady idle no mater what position the carb is in except for when I close it. It's a Briggs Industrial plus 5hp.
    Mikel1
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    Re: 5HP briggs won't throttle up 2016/09/17 20:26:08 (permalink)
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    Does this carb have the main jet that screws in holding carb bowl on? If it does make sure it is clean.
    With the throttle open opening test not helping then most likely a fuel delivery problem.
    antill81
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    Re: 5HP briggs won't throttle up 2016/09/18 10:08:19 (permalink)
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    It does. I've cleaned it with carb cleaner and compressed air. I can see the carb cleaner shoot up into the body when I spray it into the main jet. It appears to be clean
    Mikel1
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    Re: 5HP briggs won't throttle up 2016/09/18 12:12:50 (permalink)
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    If you are certain fuel system is clean then check valve clearances. If clearances are good then look and see if travel of valves is about the same.
    antill81
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    Re: 5HP briggs won't throttle up 2016/09/18 12:36:49 (permalink)
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    Ok. I'll check that next. Thanks.
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