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  1. Not a super mod but she run 74mph, mariner 30hp...

    Not a super mod but she run 74mph, mariner 30hp 689 model75644
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    3,687

    40hp class 68423

    40hp class

    68423
  3. Replies
    9
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    3,687

    Roflhat, Solution was too simple then overlook

    Roflhat,

    Solution was too simple then overlook
  4. Replies
    9
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    3,687

    Race all day long with engine no overheating...

    Race all day long with engine no overheating issue
    6842068421
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    3,687

    Mike, We successfully with this design since...

    Mike,

    We successfully with this design since 30 years ago , over 500 racers in our region did with this system , the whole ideal was only block the gas exit to the bearing carrier, seal the mouth...
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    9
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    3,687

    Mike, We successfully with this design since...

    Mike,

    We successfully with this design since 30 years ago , over 500 racers in our region did with this system , the whole ideal was only block the gas exit to the bearing carrier, seal the mouth...
  7. Replies
    9
    Views
    3,687

    We submerged only half of the gearcase in the...

    We submerged only half of the gearcase in the water, Yes ! water flow up, however need some modification internally, seal the exit gas at bearing carrier, seal & block the gas passage at upper and...
  8. What power gain to be expect ?

    What power gain to be expect ?
  9. Replies
    9
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    3,687

    Water Intake system

    New intake system for new project 30hp yamaha68418
  10. Hi Mike, I am working on research converting...

    Hi Mike,

    I am working on research converting Yamaha 30hp x 2 cylinders, also plan converting a 56 omc in future
  11. Stock convert to alcohol, mehanol / nitromethane

    Dearest All,


    What steps to consider if converting stock motor to pro = alcohol / methanol / nitromethane ?

    Regards,
    Dvd
  12. Replies
    4
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    2,240

    I just need the gears for spares

    I just need the gears for spares
  13. Replies
    4
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    2,240

    My question is this nitro lower not the bolt

    My question is this nitro lower not the bolt
  14. Replies
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    2,240

    Nitro Identificaion

    Can anyone confirm if this is nitro lower with 15:28 gears ?6309763098
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