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  1. #11
    New Member
    Join Date
    Jun 2012
    Posts
    20
    Location
    bismarck, north dakota
    Tractor
    john deere

    Default Re: pony motor problem....need help

    i forgot to say that only one of my 720's have the problem, i think it is the 1957 moel

  2. #12
    New Member
    Join Date
    Jan 2013
    Posts
    4
    Location
    sykesville, md
    Tractor
    jd 720D

    Default Re: pony motor problem....need help

    Dear Larson:

    From Two cylinder Mag March 2013. I will check this tomorrow:

    The V-4 Starting Engine on my "70" Diesel has been
    completely rebuilt but seems to lack the power
    needed to crank the tractor engine over properly. The
    V-4 runs fine, a lot better now than it did before, but
    under load it looses power. I hate to have to tear into
    things after spending a lot of time and money on this
    tractor, so was hoping you might be able to offer some
    suggestions that would lead directly to a solution.
    Carl B., Ohio

    Check the clips used to position the ignition wires as
    they go from the distributor to the spark plugs. If they are
    pinching the wires too hard, a ground could be created that
    only shows up under load. It's not an uncommon problem.

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