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Grandstand pops, Backfires when blades not on

Discussion in 'Mechanic and Repair' started by v6rs97, Apr 30, 2014.

  1. v6rs97

    v6rs97 LawnSite Member
    Messages: 234

    I'm not even sure. Dumped it back at the dealer
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  2. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837

    Sounds like the valve lash is tight or the push rod came off if the motor wouldn't run with one cylinder. My mowers will run on one but won't start on one (pull start).
  3. taxidermist

    taxidermist LawnSite Member
    Messages: 49

    I had a briggs do the same thing and it was from blow by on a intake valve. It would still do it when the mower was on but it was very hard to hear it.

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