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    jeflyda's Avatar
    jeflyda Posts: 2, Reputation: 1
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    #1

    Jul 19, 2008, 06:40 PM
    How do I adjust valves on a 15.5 briggs and stratton lawnmower
    Hi we need help with trying to set the vavles in our riding lawnmower. We have a 15.5 briggs and stratton thank you
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Jul 19, 2008, 06:46 PM
    With the piston 1/4" down on the power stroke adjust per specification.
    jeflyda's Avatar
    jeflyda Posts: 2, Reputation: 1
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    #3

    Jul 19, 2008, 06:51 PM
    Quote Originally Posted by KeepItSimpleStupid
    With the piston 1/4" down on the power stroke adjust per specification.
    What are the specs to adjust it at
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Jul 19, 2008, 07:01 PM
    My crystal ball is broken again. Every model engine has different specifications for the valve clearances for intake and exhaust.

    Briggs has repair manuals at Home - Briggs & Stratton
    MOWERMAN2468's Avatar
    MOWERMAN2468 Posts: 3,214, Reputation: 243
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    #5

    Jul 20, 2008, 06:15 AM
    Run the engine for five minutes. Shut down, remove the tappet cover (valve cover), have some old shop towels underneath the cover to catch the oil that is going to run out. Get the engine on compression stroke and at TDC PLUS one quarter of an inch. Then set the valves to .005" using the jambing nut and feeler gauges.
    d7t4w32's Avatar
    d7t4w32 Posts: 3, Reputation: 1
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    #6

    Nov 22, 2012, 05:26 PM
    The specs for my 2001 15 1/2 hp B&S engine is .003-.005 intake and 005.-007 for exhaust. Does this help?
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