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50 hp carb problem

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  • 50 hp carb problem

    Ran a compression check, which came out good but I can only get about 2000 rpm's out of engine when I run it.

    I have spark at all three cylinders but when I put my hand over carb intake I can stall engine on cylinders 1 & 2, which is normal. When I try to stall the engine on the lower carb, I have suction and you can see the fuel but I can't stall engine.
    I can put my hand completely over the carb and it still keeps running. I'll pull off the carb tonight although I did rebuild all three carbs earlier this year.

    Does anyone have any other idea's??

  • #2
    Check fuel pump diaphragm , could be torn and dumping fuel into #3 crank case

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