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    mousemang2's Avatar
    mousemang2 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 12, 2012, 09:29 AM
    Briggs & Stratton 17 HP Compression
    My B&S 17 1/2 HP Lawn tractor was cutting heavy grass. It started to backfire then stalled and would not start. I replaced the Head Gasket since it had been smoking, but it still will not start. It spins over fine and has 75 PSI Compression. It seems that some gas comes out of the carburetor when cranking over, but the spark is good and I checked the flywheel keyway, it is fine also.
    Mousemang2
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Nov 15, 2012, 05:27 PM
    Hi,
    That sounds like the valves are adjusted too tight at 75 psi. Should be 0.006"
    Peace,
    Clarke
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