Lightweight high-power single cylinder outboard

Discussion in 'Outboards' started by Dr. Peter, Mar 5, 2011.

  1. Dr. Peter
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    Dr. Peter Junior Member

    What is the lightest weight highest power single cylinder outboard out there?
    Peter
     
  2. michael pierzga
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    michael pierzga Senior Member

  3. PAR
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    PAR Yacht Designer/Builder

    There's a reciprocating point of limited returns if you will, on spinning engine parts. I've seen single lung, 15 hp engines that could be hot rodded to over 30, but their life span was measured in how many yards or minutes they could run before spitting parts through the engine cover.
     
  4. Eagleburger
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    Eagleburger Junior Member

    A single will shake a lot too.
     
  5. Dr. Peter
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    Dr. Peter Junior Member

    Too heavy and too far away


    I have an 8 hp of the type you mention which I use on another boat. It is a great engine in my opinion.

    The background to this query is that the Yamaha seems to hang an awful long way away from the transom on the outboard bracket on my newly acquired trailer sailer. It's too heavy. I wanted something smaller and lighter - hence my equiry about a single cylinder - lighter motor.
     
  6. DCockey
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    DCockey Senior Member

    We have a Mercury 6 HP which is reasonably light at 55 lbs/25 kg. It's primary use is as auxilary on a 20 foot, 1 1/2 ton sailboat which it will push nicely at 5+ knots. It's also compact, smaller than the 4 HP, 2 stroke, Evinrude it replaced. The same engine is also sold under the Mariner brand.
     
  7. pistnbroke
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    pistnbroke I try

    if its a mercury or mariner its a Yamaha
     
  8. DCockey
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    DCockey Senior Member

    The Mercury/Mariner 6 HP 4-Stroke is a completely different engine than any Yamaha engines.
     
  9. pistnbroke
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    pistnbroke I try

    my brain slippage..... I should have said its a Tohatsu. Many of the slightly older Mariners were in fact Yamaha but Tohatsu are now supplying many manufacturers world wide
     
  10. Dr. Peter
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    Dr. Peter Junior Member

    Saw a DT4 2 stroke Suzuki at my local Yamaha dealer for half the price of a new motor. Any opinions - based on experience about these?
    Peter
     
  11. pistnbroke
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    pistnbroke I try

    Ask the dealer for a water test on your boat ..if its ok buy it ...bit like a sheila ..give it a test run ..sometimes second hand runs very well.....ha ha
     
  12. Dr. Peter
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    Dr. Peter Junior Member

    Mariner 5

    A friend had a 5hp 2 stroke mariner which I have seen in action. Good price. Any thoughts?
     
  13. pistnbroke
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    pistnbroke I try

    Isthis the one ???? most of the slightly older 2 stroke Mariners are yamaha like this one light at 21 kg
     

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  14. powerabout
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    powerabout Senior Member

    tohatsu are still selling 2 strokes
    on average 10+kg lighter than their 4 stoke equivalent
     

  15. pistnbroke
    Joined: Jan 2009
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    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    Read a recent reviw of some 4 strokes 9.9 s .....bollard pull /max speed etc ..They then got a 25 year old 2 stroke 9.9 not run for 10 years and compared it ......faster and more bollard pull ...but used more fuel .........what you put in the tank comes out the prop ....
     
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