Re: ’56 Big Twin LU drain passage plugged

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October 2, 2015 at 5:48 pm #25008
Leon
Participant

    Those are usually plugged from years of corrosion in there. It’s very difficult to clear it up and get it draining correctly.
    Unfortunately, past owners have not kept those clean and this is what we end up with. The factory designed these older motors with too small of holes and they plug up easy. You’ll notice that a lot of newer motors doubled the size of those drain holes, so there is far less chance of plugging up.