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    snuggs69's Avatar
    snuggs69 Posts: 1, Reputation: 1
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    #1

    Mar 29, 2009, 11:46 AM
    18 hp craftsman mower won't start
    I have an 18 hp craftsman rider. It has spark and is getting fuel. It barely turns over, and then only one compression stroke. If u remove the plug it whirls over fine, a friend said the vlaves need to be adjusted but I don't know how. And thoughts?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Mar 29, 2009, 12:19 PM

    Hard to tell without the make of the engine. Also can't make any guesses without a model #.

    For some of the overhead cam Briggs engines, you rotate the piston 1/4" down on the power stroke (intake, exhaust, compression, power) and use a flat feeler gage under the rocker's and adjust each valve for the proper clearance so that the feeler is snug when inserted and lock down the lock-nuts. Clearances should be able to be found online, otherwise it's available in the repair manual. If briggs its, Home - Briggs & Stratton or you can use Parts & Accessories | Shop & Find Lawn & Garden, Appliance Parts at Sears PartsDirect | SearsPartsDirect.com for breakdown info.

    Briggs stamps their blower housing (impossible to read) with a model and type number. From there, breakdown manuals are free, but service manuals are not.

    This is similar, but unlike the way car valves are adjusted.
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