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    dugger902's Avatar
    dugger902 Posts: 1, Reputation: 1
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    #1

    Apr 8, 2010, 07:55 PM
    What should the compression be on a Briggs & Stratton 17.5 HP engine
    What should the compression be on a Briggs & Stratton 17.5 HP engine OHV. Mine is 50psi. I trying to determine why my engine smokes under a load.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Apr 8, 2010, 08:40 PM

    What happens when you do the compression test again with a bit of oil in the spark plug hole? C increases usually rings, doesn't change then usually valves. Smoke on start-up valve seals.

    What color smoke?

    Have you checked valve clearance?
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