Gear Ratio

Home Forum Ask A Member Gear Ratio

Currently, there are 0 users and 1 guest visiting this topic.
Viewing 5 posts - 1 through 5 (of 5 total)

  • labrador-guy

    US Member - 2 Years
    Replies: 607
    Topics: 49
    #198544

    OMC guys, does a 10hp 1956 five bolt gear case have the same gear ratio as a 1957 five bolt 18hp gear case? I am using a 10 horse gear case on a 18 and was wondering if I was making a mistake.

    dale


    frankr

    US Member - 1 Year
    Replies: 5981
    Topics: 49
    #198547

    They are not the same. 15:26 for 10hp, 12:21 for 18hp


    billw

    US Member - 2 Years
    Replies: 1655
    Topics: 51
    #198559

    The ratio is pretty close, at 1.73 for the 15 and 1.75 for the 18. The question in my mind is will the smaller teeth of the 15 stand up to the extra hp?

    Long live American manufacturing!


    fleetwin

    US Member - 2 Years
    Replies: 4119
    Topics: 42
    #198564

    Learned something today….Always thought the gears were the same….


    labrador-guy

    US Member - 2 Years
    Replies: 607
    Topics: 49
    #198581

    Thanks guys! Probably not worth changing as little as I am gonna run it. I have a 9X11 propeller for it. Another one for sea testing. Wish I lived on a lake somewhere. The right propeller should even things out.

    tks again
    dale

Viewing 5 posts - 1 through 5 (of 5 total)
  • You must be logged in to reply to this topic.