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  1. Replies
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    Sticky: it makes more power but having the piston flat...

    it makes more power but having the piston flat against the exhaust port rather then cocked over
  2. Replies
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    379,603

    Sticky: custom 49ci race engine from OMC

    custom 49ci race engine from OMC
  3. Replies
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    379,603

    Sticky: no good I'll give ya $100 to take it away...lol...

    no good I'll give ya $100 to take it away...lol
    31M race engine
  4. Replies
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    451

    great offer, love to do that

    great offer, love to do that
  5. Replies
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    451

    Hi Ron from teh PArker thread on S&F The Div. II...

    Hi Ron from teh PArker thread on S&F
    The Div. II 2.0 liter rules say V-4 and inline 6 motors are called alternate motors and are exempt of the aforementioned rules. How much freedom are we talking...
  6. Replies
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    451

    yes 12 T750 boats with stock 50 3cyl tohatsu's...

    yes 12 T750 boats with stock 50 3cyl tohatsu's will be in Singapore Dec 6,7,8
  7. Replies
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    Thanks Ron yes still in Singapore The question...

    Thanks Ron yes still in Singapore
    The question is for us here from the Port Authority, simple question but its not on any UIM or APBA doc I can find.
    We are 99% there to have T750 race on the east...
  8. Replies
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    451

    Race course setup info - need help

    Hi Guys

    can anyone point me to a specification for the safety clearance from race track to spectator boats?
    Has there ever been a specification posted like how fast how far type of thing?
    ...
  9. Replies
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    713

    if pistons are stock you add 030 to original bore...

    if pistons are stock you add 030 to original bore size
  10. Replies
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    241

    is the hull smooth underneath in the middle or...

    is the hull smooth underneath in the middle or does it have the join seam protruding?
    Thats an issue when raising the engine height
  11. Replies
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    You need to check what the piston uncovers. So...

    You need to check what the piston uncovers.
    So you need to crank in a block with piston and rod
  12. Replies
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    good question, thats very important. lots of...

    good question, thats very important.
    lots of dyno time and egt monitoring required there
    typically you lower the angle to shift the powerband up
  13. Replies
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    701

    are you taking of ports above the piston or below?

    are you taking of ports above the piston or below?
  14. Replies
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    701

    how do the ports in the piston line up? There is...

    how do the ports in the piston line up?
    There is a simple mod and thats to make a late 45 piston cut look like the old 60hp one
  15. Replies
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    yes but only in East Malaysia

    yes but only in East Malaysia
  16. Replies
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    where is that?

    where is that?
  17. Replies
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    Sticky: when you have a strange problem with a Merc, swap...

    when you have a strange problem with a Merc, swap out the stator
  18. Replies
    611
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    301,437

    Sticky: its a great effort and it will be an engine...

    its a great effort and it will be an engine remembered for a very long time
  19. to stop the engine the black yellow must be...

    to stop the engine the black yellow must be grounded
  20. You can see why it went nowhere in the usa when a...

    You can see why it went nowhere in the usa when a 45ci sst45 craps all over it
  21. Replies
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    901

    what powerhead is that?

    what powerhead is that?
  22. so it still starts and idles?

    so it still starts and idles?
  23. wow, it has slowed down.... Have you got a few...

    We actually have tried something even better.....prior to the race season we would have a Saturday get together and invited everybody with a T boat and those interested in T boats to attend. We had a...
  24. How about having a boat available for a test...

    How about having a boat available for a test drive so the punters can try before buy?
    You market a race with that and have a quick orientation and some driver training then a drive and see who...
  25. Replies
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    del

    del
  26. Racing any class with those engines always make a...

    Racing any class with those engines always make a great class
  27. Replies
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    The bore has never changed, pistons and rods got...

    The bore has never changed, pistons and rods got better over the years. In the 70's
    They are a great engine
    The sst45 is just a 60hp with a different exhaust and shaved head, 60hp sleeve so same...
  28. Replies
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    670

    72 has old electric shift lower unit, I would...

    72 has old electric shift lower unit, I would imagine very hard to find parts
    I would have thought the powerhead rebuild parts are still available?
    If you can move up to a later engine 1980+ they...
  29. Replies
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    IMHO lots of carby OMC's are on the limit re...

    IMHO lots of carby OMC's are on the limit re reeds hence if you mod them to produce more power increasing the reed area will help.
    I think of it as the low pressure from the piston going up happens...
  30. solid mounts? I have watched a few videos of...

    solid mounts?
    I have watched a few videos of that long shaft stock class and its a bit dodgy
  31. thanks Hounddog sounds like there are lots of...

    thanks Hounddog
    sounds like there are lots of options and sustainable/easy to find parts
    I thought about a new mid for the 56 so it bolts up, 15" and solid mounts, go racing ( cut drive shaft)
  32. Wow, large gearcase with propshaft just under and...

    Wow, large gearcase with propshaft just under and very low ratio was fast??
    What caused that do you think, more diameter with low ratio would get you out of the corners I guess?
    How many seconds in...
  33. propshaft height is another way to slow boats...

    propshaft height is another way to slow boats down and helps safety re spins
  34. Replies
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    Sticky: what is that 3 cyl engine with the bendix looking...

    what is that 3 cyl engine with the bendix looking injection?
  35. Replies
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    Thanks John I watched some guys do it on RJ's...

    Thanks John
    I watched some guys do it on RJ's engine at Port Neches a few years ago, simple enough, they had go no go gauges.
    I imagine a stock OMC has 1/2" radius, perhaps they dont care or it has...
  36. Replies
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    Hi John reading the detail I cant see a...

    Hi John
    reading the detail I cant see a specification for the any port radius, got height, width and exhaust chamfer but not the corners?
    Even the exhaust is eyebrow style so has a large radius top...
  37. Merc still building small engine carby 2 strokes...

    Merc still building small engine carby 2 strokes but not for sale in the USA
  38. How about the sound, a modded v8 merc will sound...

    How about the sound, a modded v8 merc will sound good, but the rest, yuk!
    Look what happened in FIA F1 when they dropped the v8
    Nascar with a v6?
  39. I think the issue might be most of the engines...

    I think the issue might be most of the engines are highly optimized to do the job they were designed for hence as light as possible.
    Its not a LS3 where GM knows they will be getting a hard time....
  40. but you had gears....

    but you had gears....
  41. If they want to spend money get them to make EFI...

    If they want to spend money get them to make EFI kits for old 2 strokes
    create a new EFI controller for etec injectors now ya talking
  42. I heard Merc tried to mod that 4s60hp lump on...

    I heard Merc tried to mod that 4s60hp lump on the European F4, it kept blowing up so it went back to stock?
    Goes into gardian mode just getting off the dock and maybe down the straight, dont know...
  43. Replies
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    thanks John, that has some more updates from my...

    thanks John, that has some more updates from my 2015 version

    whats new is the pistons, the docs says;
    Pistons/Rings:
    There is only one model of SST45 piston available in standard bore and 0.030...
  44. Replies
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    Hi Dean Been there, its in the index but it has...

    Hi Dean
    Been there, its in the index but it has been removed from that document the page says;

    Stock Outboard Technical Manual
    35
    45SS CLASS
    OMC 45SS ENGINE SPECIFICATIONS (45SS CLASS)
    FOR...
  45. Replies
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    just the Caddy shack joke..

    just the Caddy shack joke..
  46. Replies
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    SST 45 OPC engine spec

    can anyone point me to the page on the apba site where this doc is?
    thanks

    I emailed them and no answer
    why is it so hard????
    APBA Resources

    Browse our library of resources for helpful...
  47. Replies
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    6,166

    I drove under a boat or somebody drove over me??

    I drove under a boat or somebody drove over me??
  48. Replies
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    Another race in Macau done....

    Another race in Macau done.
    https://www.powerboatracingworld.com/category/asia-powerboat-race/

    After provisional pole it all went down hill for me then my helmet scratched somebodies anchor...
  49. Replies
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    SST45 sleeve?

    Can anyone confirm that the LA Sleeve L0120B is the legal sleeve for a 45?

    PS Ron, can you bring the sst45 thread back?
  50. Replies
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    When the reeds are too big fuel puddles so for...

    When the reeds are too big fuel puddles so for carby engine they idle bad.
    You can see on e-tec engine some models have doulbe the reed area than when it was a carby engine or engine of same hp....
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