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-   -   Compression release 15.5 briggs motor (https://www.askmehelpdesk.com/showthread.php?t=219428)

  • May 24, 2008, 05:24 PM
    ginsenghunter
    Compression release 15.5 briggs motor
    Hello, I have a 15.5 Briggs and stratton engine on a Snapper mower and from what I have read in other forums I believe the compression release is not working the way it should. Not knowing a lot about engines I have so far replaced the starter (I broke it) the solenoid, and battery cables. The problem is that when I crank the engine it turns over fast enough but stops after about one turn and seems to be straining to crank again. If I turn the flywheel by hand slightly it will turn over easily again for another rotation then stop again and the process repeats. I removed the spark plug and the engine cranked over really fast without any hesitation and kept cranking until I turned the key off. My question is does it sound like I might have a bad compression release and if so could I with limited tools and basic mechanical skills repair it or should I take it somewhere to have it fixed?

    Thanks for any help!
  • May 24, 2008, 07:16 PM
    MOWERMAN2468
    Well, true some briggs engines had a problem some years ago with compression releases. However, I would certainly suspect your valves are out of adjustment.
  • May 25, 2008, 05:59 AM
    ginsenghunter
    Thanks I will check that valve adjustment!
  • Nov 22, 2012, 05:39 PM
    d7t4w32
    Quote:

    Originally Posted by MOWERMAN2468 View Post
    Well, true some briggs engines had a problem some years ago with compression releases. However, I would certainly suspect your valves are out of adjustment.

    I have the same problem on my 15.5hp B&S engine but my valve clearance is within specs, so I suspect a worn cam lobe.

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