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  1. Replies
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    I love the Yamaha 30 2 str 3 Cyl but this 30 4...

    I love the Yamaha 30 2 str 3 Cyl but this 30 4 str Tohatsu ain't bad :

    <iframe width="854" height="480" src="https://www.youtube.com/embed/ifWwZUEesTQ" frameborder="0" allowfullscreen></iframe>
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    39,178

    Sweet Glenno. You need another cat project.

    Sweet Glenno. You need another cat project.
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    24,249

    Avoid over-idling on the hose.

    Avoid over-idling on the hose.
  4. Replies
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    24,249

    Somethings not right. Most smaller 2 strokes...

    Somethings not right. Most smaller 2 strokes should be around 5500-6000 rpm at WOT .
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    14,116

    No, its not the record holder. This pic was shot...

    No, its not the record holder. This pic was shot during the Rouen endurance race a few years back - before the yammie 70 was outlawed.
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    19,065

    http://www.amazon.com/Then-Now-Ralph-DeSilva/dp/09...

    http://www.amazon.com/Then-Now-Ralph-DeSilva/dp/0989617211
  7. Replies
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    28,285

    Who's record is that ?

    Who's record is that ?
  8. Replies
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    8,938

    Then you'd be close to Rowan's P750 UIM record....

    Then you'd be close to Rowan's P750 UIM record. That would be quite a feat.
  9. Thread: Yamaha 60 c

    by FrenchPhil
    Replies
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    9,983

    What's boat is it and current setup & speed ?

    What's boat is it and current setup & speed ?
  10. Replies
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    3,152

    Don't think that hull needs much setback and...

    Don't think that hull needs much setback and trim. I'd remove the CNC & then try a cleaver.
  11. Replies
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    4,897

    Fast Fred is the man.

    Fast Fred is the man.
  12. Replies
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    8,426

    Choppers are not surfacing props so I'd get my...

    Choppers are not surfacing props so I'd get my hands on a cleaver like a 10 x 14ish for starters. What max speed & rpm did u reach? Show us some boat & setup pics.
  13. Replies
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    5,465

    You previously mentioned 325 kgs without crew....

    You previously mentioned 325 kgs without crew.
    Hers a pic of a s850 circuit cat.
    You should try a smaller cleaver like 13x20 for comparison.
    But I ran the prop slip calc & the 2.42 gearcase has to...
  14. Replies
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    5,465

    Actually those wedges are still common in the...

    Actually those wedges are still common in the smaller circuit cats so I wouldn't touch those yet. 325kgs is heavy for a 15' but as mentionned give us some setup info 1st.
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    Already answered that, hence this thread...

    Already answered that, hence this thread...
  16. Replies
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    20,431

    In France, very unlikely...

    In France, very unlikely...
  17. Replies
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    20,431

    If there are no ModV plans out there, then it...

    If there are no ModV plans out there, then it should be easier to start with 18-19' full tunnel plans & add a centre pod.
    Maybe the wood boat building experts out there can give some pointers on...
  18. Replies
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    20,431

    Found this beauty on SnF

    Found this beauty on SnF
  19. Replies
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    20,431

    Do you have pics by any chance ?

    Do you have pics by any chance ?
  20. Replies
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    20,431

    Actually I was toying with the idea of building...

    Actually I was toying with the idea of building my own full tunnel cat. Then I figured why not build a modv as it would carry weight better & be more stable at speed.
  21. Replies
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    20,431

    Mod VP Plans

    Found some full tunnel wood boat plans on the internet but couldn't find Mod VP ones.
    Any tips ?
  22. Replies
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    3,660

    There is no "proper" height as long as there's no...

    There is no "proper" height as long as there's no water starvation. If you want to go faster try a cleaver. What's your current speed at WOT ?
  23. Definitely a good find. Here's a link to the tech...

    Definitely a good find. Here's a link to the tech manual:

    http://www.box.net/shared/24jtr2ycxe

    It's in French but as a Canuck you should do Ok.
  24. Both short & long were available. What boat will...

    Both short & long were available. What boat will you pair with the 50 ?
  25. Yes, in Europe the 850cc block was used on the...

    Yes, in Europe the 850cc block was used on the 50G (62F), 60F(6H2) & 70B(6H3).
  26. Replies
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    Most of the speed records in your category were...

    Most of the speed records in your category were done with semi-cleavers, so I'd try a 10ish x16 & take it from there.
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    Wonder how much HP they actually had...

    Wonder how much HP they actually had...
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    54,849

    Well, it did in at least once in 1992 - 101.93MPH...

    Well, it did in at least once in 1992 - 101.93MPH - UIM record. Since the motor is no longer legal in European/World class races like Rouen, there's probably good deals to be made.
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    How much is a 525efi Merc ?

    How much is a 525efi Merc ?
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    Well considering the UIM record for that motor is...

    Well considering the UIM record for that motor is 102.5mph there probably lots to be done...
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    20,289

    Is the torpedo level with sponson bottom ?

    Is the torpedo level with sponson bottom ?
  32. First for cooling I'd go with a nose cone but if...

    First for cooling I'd go with a nose cone but if the motor is still too high, consider a small manual jackplate.
  33. Thread: tiny tach ?

    by FrenchPhil
    Replies
    3
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    2,974

    http://www.tinytach.com/tinytach/images/gas_instru...

    http://www.tinytach.com/tinytach/images/gas_instructions.pdf
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    Here's a start : ...

    Here's a start :

    http://www.mercruiserparts.com/selectDocs.asp?doc_nbr=817087R+2

    Phil
  35. So like will 3% oil be slower than 2.5% at a...

    So like will 3% oil be slower than 2.5% at a given rpm ?
  36. Replies
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    The 90 (&70hp) Yammies are very popular in...

    The 90 (&70hp) Yammies are very popular in Europe. They hold alot of inshore & offshore UIM records. The smaller american 3cyl race motors were hard to find so the 3cyl Yammies were the thing along...
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    17,689

    What is boat length ?

    What is boat length ?
  38. Replies
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    Inshore race boat gears are close to 1:1, they...

    Inshore race boat gears are close to 1:1, they use smaller diameter/pitch props because of light boats/loads. As loads increase so does gear ratio & prop diameter/pitch. So if you just want speed...
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