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Thread: won't turn over

  1. #1

    won't turn over

    I have a MTD riding mower with engine model number 313707 that won't crank over past the compression stage. I installed a new starter and have tried jump starting it off my car and will crank till it reaches the compression. Installed new spark plug and without plug will spin. Any ideas before sending to the scrap yard?? thank you

  2. #2

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    Re: won't turn over

    Remove the plug, and the valve cover. Turn the engine over by hand while watching the piston. Set the piston 1/4 inch past TDC with both valves closed. Set the intake valve at .003-005 and the exhaust at .005-.007. The intake valve should be the bottom valve on the head when looking from above. reassembly and see what happens, If that doesn't fix it post back for further instructions for checking the compression release.
    ILLINOIS ENGINE, BEECHER CITY, IL
    BRIGGS AND STRATTON MST (MASTER SERVICE TECHNICIAN)
    Sales and Service for Dolmar, Poulan, Briggs and Stratton, Kohler, Lauson(Tecumseh, LCT), Generac, Brute, Honda, Subaru
    Warranty service for MTD, Murray, Powerwasher, Karcher, Mcculloch, Earthwise, Earthquake, Yamaha engines, Hisun, American Sportsworks, Worx, Rockwell Tools, Great Lakes Technologies products(Wen, CZ), Efco, Snap-On pressure washers, and others.

  3. #3
    I have Kohler that does this does not have adjustable valves I turn the key and give it a help by hand. Been this way for years

    (( racing is the only sport that you need two balls ))

  4. #4

    Re: won't turn over

    Quote Originally Posted by ILENGINE View Post
    Remove the plug, and the valve cover. Turn the engine over by hand while watching the piston. Set the piston 1/4 inch past TDC with both valves closed. Set the intake valve at .003-005 and the exhaust at .005-.007. The intake valve should be the bottom valve on the head when looking from above. reassembly and see what happens, If that doesn't fix it post back for further instructions for checking the compression release.
    Will try that. going to try and start with an impact wrench first.

  5. #5

    Re: won't turn over

    Please don't try with an impart wrench, unless you are a gambling man. Could get very expensive. Follow IL's recommendation and adjust the valve clearance.
    This is only my opinion, and many will say it ain't worth a darn, as I'm only a retired grease monkey instructor and not a professional mechanic. Use what I post at your own risk as you know teachers only know book knowledge.

  6. #6

    Re: won't turn over

    Quote Originally Posted by Rivets View Post
    Please don't try with an impart wrench, unless you are a gambling man. Could get very expensive. Follow IL's recommendation and adjust the valve clearance.
    Adjusted valves and IT STARTED, thank you for all the response. And yes I was going to try an impact if not started. Now for the other mower

  7. #7

    Re: won't turn over

    1996 Montgomery Wards Powr Kraft 18hp 42 in hydro with B&S twin cylinder.
    Had the same problem for years & it would kill batteries, starter solenoids & starters.
    Finally had a local generator/starter repair shop owner tell me to replace the battery cables with larger larger cables especially the ground cable to the engine.
    I replaced the standard cables with # 2 sized cables.
    I ran a ground from the battery direct to the engine mounting bolt.
    Did that & that took care of the problem.
    This is still one cutting machine.

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