Home › Forum › Ask A Member › Neptune twin cylinder help needed › Reply To: Neptune twin cylinder help needed

#284045
Tubs
Participant



    I had 2 of them.
    Point gap is .020 plug gap is .025.
    Found point gap was changing when I moved the mag.
    With the mag handle at 5:00 O’clock (Fast) aligned with
    tiller handle, I gaped each set at .015 aligning the point
    cam follower with the flywheel key. Moving the mag
    to the 8 O’clock (Stop) position I found one set of points
    was closing to .010 and one set was opening to .022.
    If I could get it started – the high speed was 1 ½ turns out.
    I could never find any combination to get it started.
    No matter the mixture screw setting or the amount of priming
    it wouldn’t start.
    If I got it running and shut it off and it wouldn’t restart.
    I was later told the starting issue may have been bad
    condensers.
    Motor over heats when running a full throttle for an
    extended period of time.
    The exhaust is also an issue. It is the same size as
    the 4 hp. motors. It’s way too small to move air through
    a 9.5 hp motor so performance suffers. The pipe itself
    has a poor mounting system so it’s constantly vibrating
    and destroying itself. I brazed a small brass tube in the
    pipe to make a sleeve where the bolt goes through.
    This stabilized the pipe somewhat but the sleeve adds
    to the exhaust restriction problem. While the gear case
    looks to be bullet proof the shape is a big drag through
    the water.
    I jacked with the motor every day for almost 4 weeks
    and never went out without a backup motor to get me
    back home. I would run into people that wanted me to
    stop so we could visit but I was always afraid to shut it
    off. I cleaned it up, everyone liked the look, but eventually
    sold it for a 1/3rd. of what i had in it. When I got a
    second in a buy one you buy them all deal I gave it away.
    Even though running the motor (or trying to) was a
    disappointment the experience was still worth the
    investment to me. Just letting you know what you
    may be getting into.
    Here is some video. https://youtu.be/EuJlTpriSCE
    Tubs
    .

     

    A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

    1 user thanked author for this post.