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Thread: Reply from Technical Thread

  1. #1
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    Thought I should reply to Hull / Motor config here rather than tech thread.

    I got into this on a fluke, or should I say traded into it.
    Original Gemini I got was pretty well worn out but mid 90's short shaft Merc was good.
    Aquired up a well cared for mid 90's Thunder Duck. It's a bit different design than current hulls, the tunnel is straight and quite tall compared with Aquarius which is slightly narrower at the bow. I'm told the Aquarius (and others) design aids turn in, makes sense. Regardless, the straight tunnel should be quite quick in a straight line, we'll see how much lift is there. I suspect alot, can always add weight up front when one up. For turn in I'll just have to be quick with the trim.

    Will install the motor with transom wedges with prop shaft at or near centre line of high jackers
    Have 2 props at the moment. An older SS Merc 15" 3 blade and a new Merc Trophy Plus 15" 4 blade. I'm told the Trophy is a good all rounder.

    Primary use is as a fun boat in Lake Ontario. Conditions there can be anything from dead calm to 3m swells with cresting waves.
    It'll be cold and wet but I'm ready for that, picked up a dry suit recently.

    The racing we do here is closed course oval on mostly calm water.
    Which prop(s) you running for top end?

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    Team Member Andrew 4CE's Avatar
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    Those props sound good for play in Lake Ontario... but I think you'll find too small for the calm water at TORC races. But ya never know... just have to try them. Depends on the weight of your team too. I have a few 16-17" and looking for a couple 18-19". I've got a 17" Merc cleaver you are welcome to try at a race. Can try any of my props at a play day.
    Thank you!
    HydroTurf - Midland - RAM Mounts - Stuck on Decor
    James Hunter Equipment - Top Gun Marine
    Fralick Boats - NGK - Amsoil UK - Coleman UK

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    Team Member Andrew 4CE's Avatar
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    Just read that other thread... didn't realize you had a 59ci... sounds huge. No idea about props for that... but again welcome to anything I have to try.
    Thank you!
    HydroTurf - Midland - RAM Mounts - Stuck on Decor
    James Hunter Equipment - Top Gun Marine
    Fralick Boats - NGK - Amsoil UK - Coleman UK

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    The 17" Merc Cleaver sounds like a good prop for keeping the nose down, like to try that for sure, thanks.
    With the number of Mercs in T Boat this year there should be more variety to try than last year.
    Didn't Todd's son run a Merc last year, Hydromotive makes nice props, we should talk to him.
    AND there's always Ron Hill. Think he knows a thing or two about props.

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    Team Member fs5's Avatar
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    hi mate,the 15ps will make great ski props.i have a 15p trophy sport to,i've had mine pitched up 1inch and also cupped.it runs excellent,plenty of pull and tops out at 55/56mph.
    flat water racing most guys run a 12x20p cleaver as a good all rounder.if your crew weight is pretty light you may get away with a 22p.
    engine height start off with your propshaft level with the centre of the jackers,2up I run mine about 10mm above the centre at around 60mph with a 12x20p merc cleaver.
    the old Gemini's were good boats,the new evo's are real quick.
    heres a vid of one winding out with a 20p cleaver 1up
    http://www.youtube.com/watch?v=mmwSTEKUq6Q

    and one of a thunderduck in action
    http://www.youtube.com/watch?v=DkOfr3BmFB8

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    That looks like so much fun, thanks for the links.
    Andrew has that 17, I'll try that first and keep watch for a 20"
    You get any bite out of the corners with the cleaver?

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    Team Member fs5's Avatar
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    cleavers take a bit longer to plane ,but once there up there up.they bite as good as the bunny ears on turns .

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    I think a 17 will be a bit small for a 60 I will have a few props in a couple of weeks. You will need a 20 + for a 59 cube 60 .The 60 uses a different gear ratio .the 40-50 use a 1.83.1 the 60 use a 1.64.1 .

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    Quote Originally Posted by ryanhall View Post
    I think a 17 will be a bit small for a 60 I will have a few props in a couple of weeks. You will need a 20 + for a 59 cube 60 .The 60 uses a different gear ratio .the 40-50 use a 1.83.1 the 60 use a 1.64.1 .
    I'm going to have to do a little checking on the gear ratio. Got the motor late in the season so I haven't run it. Upon inspection I found it's kind of a mutt, 60 powerhead on a 40 bracket, gear ratio could be either.
    Which ever it is, be glad to get in the water if and when the Great Lakes thaw. It's been a cold one this year.

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