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Thread: Power boat for the young fulla

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  1. 18-01-2013, 07:04 PM #1
    big_foot
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    Quote Originally Posted by mucko View Post
    Johnson/evinrude changed from flywheel rating to prop rating around 1988 j140hp at the flywheel now equals 115 shaft hp. the trim plate at the top of the skeg needs to be parallel to the keel at half trim the height of the transom will be determinded by the length of the leg (mounting bracket down to trim plate) the trim plate may only need to be 10-20mm lower then the keel. if set to high you will lose trim and also you will ventilate the prop losing power and posablly depriving the leg of water and running your cooling impeller dry.
    Your a legend Mucko, I'll be able to design the whole ass end of the boat off 1 paragraph.
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  2. 18-01-2013, 09:11 PM #2
    Maca49
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    Only rule with boats is the same as cars HORSEPOWER ----------- lots and lots or you will be disappointed long term
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  3. 19-01-2013, 09:49 AM #3
    big_foot
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    Listed outboard on TM. Yamaha 15H 2 stroke short shaft | Trade Me

    Since I'm such a nice guy 10% discount off final bid for forum members
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  4. 19-01-2013, 11:22 AM #4
    mucko
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    Quote Originally Posted by big_foot View Post
    Listed outboard on TM. Yamaha 15H 2 stroke short shaft | Trade Me

    Since I'm such a nice guy 10% discount off final bid for forum members
    Is that not F.N.R selector on the side of the engine in pic 1

    looks like someone has spent shitloads on it.
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  5. 19-01-2013, 12:30 PM #5
    big_foot
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    Quote Originally Posted by mucko View Post
    Is that not F.N.R selector on the side of the engine in pic 1

    looks like someone has spent shitloads on it.
    Lucky I have the wisdom of you guys behind me

    Yea shes tidy alright aye almost vintage

    Cheers mucko
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  6. 20-01-2013, 09:39 PM #6
    mucko
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    Quote Originally Posted by big_foot View Post
    Lucky I have the wisdom of you guys behind me

    Yea shes tidy alright aye almost vintage

    Cheers mucko
    just thinking about it at milking thats a 70's 15hp that will = about 10 shaft hp in a post 1990 outboard
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