Riding mower gearbox

Discussion in 'Inboards' started by neonguy07, Jan 13, 2020.

  1. neonguy07
    Joined: Apr 2015
    Posts: 24
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: peoria il

    neonguy07 Junior Member

    So i cant afford a zf or anything truly marine so my idea is turning a mower trans sideways cut down one side use the other to connect to prop shaft.aye or nay?I dont know how the ratios would effect but at this moment it's all I got for my inboard design other than the more complicated way if removing the gearbox from the lower of a sterndrive I have building a box for it(some engineering involved) and have that for my forward reverse
     
  2. kapnD
    Joined: Jan 2003
    Posts: 539
    Likes: 47, Points: 28, Legacy Rep: 40
    Location: hawaii, usa

    kapnD Senior Member

    I’m gazing deep into my crystal ball, but it’s so cloudy in there!
     
  3. gonzo
    Joined: Aug 2002
    Posts: 13,720
    Likes: 417, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    It won't work for long. Propeller gearboxes have thrust bearings which a mower's doesn't. If using the lower from a sterndrive, only Mercruiser has fwd/reverse on it. Volvo and OMC have the on the upper.
     
  4. neonguy07
    Joined: Apr 2015
    Posts: 24
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: peoria il

    neonguy07 Junior Member

    Yea it's a mercruiser I found in the junkyard...so I guess il see if I can fab up something to house the gears
     
  5. Mr Efficiency
    Joined: Oct 2010
    Posts: 7,909
    Likes: 336, Points: 83, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    What HP was the mower ? If there is a big difference between that and the boat engine, and the ratios are all wrong, it could be a waste of your time.
     
  6. gonzo
    Joined: Aug 2002
    Posts: 13,720
    Likes: 417, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    A more important issue is to make a fuel and electrical system that is legal and safe. That is going to be really difficult with a mower engine, if that is what you are using.
     
  7. Mr Efficiency
    Joined: Oct 2010
    Posts: 7,909
    Likes: 336, Points: 83, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Of course, I didn't see any mention of using a mower engine, just a gearbox from a mower, but maybe he does intend using the mower engine, in which case a whole nuther problem.
     
  8. ondarvr
    Joined: Dec 2005
    Posts: 2,082
    Likes: 185, Points: 63, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    Lawn mower gear boxes aren’t known for their long term durability.
     
  9. Mr Efficiency
    Joined: Oct 2010
    Posts: 7,909
    Likes: 336, Points: 83, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Best plan would be to mow a few lawns and use the money to buy the proper equipment/
     

  10. gonzo
    Joined: Aug 2002
    Posts: 13,720
    Likes: 417, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Used outboards are cheap.
     
    7228sedan likes this.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.