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spark plugs

  1. x738 Bad Spark Plugs

    Lawn & Garden Tractors
    I've got a John Deere x738 with 60 hours on it. About two weeks ago on start up I could tell it was different. The engine vibrated a lot more and the engine seems to be misfiring. When the engine starts its fine, but about 10 seconds after startup it beings acting this way. It clears itself up...
  2. 2000 JD 445 w/54" deck - Correct NGK Plugs?

    Lawn & Garden Tractors
    I bought a used 2000 445 mower. It's running erratically, wanting to cut out, so I checked the plugs - one side has a NGK BPR5ES, the other side has a NGK BPR9ES. Which is correct? Either? neither? I do not have the owner's manual. Also, if you know the correct gap, would like to know that...
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