outboad hydroplane and motor choice?

Discussion in 'Outboards' started by racing fan, Nov 30, 2010.

  1. Yellowjacket
    Joined: May 2009
    Posts: 662
    Likes: 112, Points: 43, Legacy Rep: 447
    Location: Landlocked...

    Yellowjacket Senior Member

    You need to look at the weight distribution since your inboard with a surface drive will put more weight forward than the original outboard did. IF you can get a similar weight distribution by moving the driver further aft than it was in the original boat it could work. If not you could end up with an evil handling thing that will try its darndest to throw you out of it. Remember that the original outboard had a skeg and sometimes a turn fin at the back for stability. Make sure you have at the very least as much surface back there to keep the pointy end aimed in the right direction.

    It does seem like a lot of work when you can simply buy an outboard with as much or more power for almost nothing. I bought a 1977 50 hp Merc a couple of months ago for $300 and it runs just fine.

    You are also going to need the right prop and that won't be cheap either, but if you want to tinker go for it.
  2. tunnels

    tunnels Previous Member

  3. tunnels

    tunnels Previous Member

  4. stupidbaker57
    Joined: Jan 2011
    Posts: 67
    Likes: 4, Points: 8, Legacy Rep: 40
    Location: Lakeville Ma

    stupidbaker57 Junior Member

    Yep, still alive, wish I could say the same for the boat. :mad: I got it in the ewater, fired it up, and grabbed a hand ful of throttle. Almost got it on plane went my knees started to hurt. (I forgot a life preserver cusion to knell on) I ideled back to the dock and shut it off never to hear from it again. The engine seized up. Don't know if it's the pstons or the crank. The tranny is ok and still is free, but not the motor. When I get a chance I open it up and find out. In the meantime I'll hang on a 28hp Evey I have.
  5. Lt. Kludge
    Joined: Jul 2010
    Posts: 18
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    Location: Massachusetts, USA

    Lt. Kludge Junior Member

    A Yamatto 102 or 302 is probably cheaper and a better fit. Just remember the Yamatto doesn't have a water pump a relies on the prop surface piercing to get cooling.
  6. Jerry Horne
    Joined: Jun 2017
    Posts: 1
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    Location: Florida

    Jerry Horne New Member

    Can you contact me about your hydro in the pic. I worked for a company that made one very similar. Anyone else has a hydro like this please contact me. It was fiberglass and the process was RTM. Built back in the late 80's.

  7. DaveLKN
    Joined: May 2018
    Posts: 1
    Likes: 0, Points: 1
    Location: Lake Norman NC

    DaveLKN New Member

    I have a friend here in NC that has a fiberglass hydro that appears to be exactly like this one. Based on what I know about RTM, this hull was no doubt built and molded this way. I’ve thought about buying it from him, primarily for the 25 Merc on it, but if the boat is fun to operate I may keep it together if I go through with the deal. Comments and information would be appreciated.
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