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  1. Replies
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    Any updates?

    Any updates?
  2. Replies
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    Did you ever get the motor complete and running?

    Did you ever get the motor complete and running?
  3. GOOD NEWS!.....from OPBRA It's official!!! ...

    GOOD NEWS!.....from OPBRA

    It's official!!!

    We are proud to announce that COGECO has signed on as out Title Sponsor for the 2019 race season.

    They, along with YourTV will be filming at all...
  4. We actually have tried something even...

    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...
  5. Any ideas to help develop interest in opc boat racing??

    I really got off topic on my other thread, so I thought it best to start this thread.
    Over the last few years there has been a major decline in interest in OPC type racing in our area. We have tried...
  6. Solid motor are part of the current T rules so...

    Solid motor are part of the current T rules so Hobby Class could use them. The idea in Hobby Class is for the person who just wants to try T racing. They are not going to rebuild the motor, they will...
  7. Here in Ontario, Canada we have a shorter boating...

    Here in Ontario, Canada we have a shorter boating season and all fresh water so motors last longer and are in better condition compared to most areas. The 75 cent Canadian Dollar hurts when buying...
  8. We tried the 49-big foot-15 inch for several...

    We tried the 49-big foot-15 inch for several reasons. One was to compare the performance to the VP75 class which only allows long shaft motors. We had tried the long shaft version with a Checkmate a...
  9. The T750 boats are 55 to 67 hp. The T850 altered...

    The T750 boats are 55 to 67 hp. The T850 altered 56 OMC ‘s are 100 hp plus. Speed wise the T750 record is over 65 mph. Our best T850 recorded speed is 80 mph while the UIM T850 record is 68 mph....
  10. We currently have a prop shaft UIM...

    We currently have a prop shaft UIM rule.....basically it must be below the bottom of the boat and we allow nose cones but not low water pick up nose cones or remote transom water pick-ups. We put the...
  11. There is a big difference between running in a...

    There is a big difference between running in a oval boat race and seeing the best top speed. The oval boat race is about the fastest lap time not the fastest speed. Tom runs against stock 2 stroke...
  12. I just noticed on the TORC......Toronto Outboard...

    I just noticed on the TORC......Toronto Outboard Race Club..site that the link to the rule book is a link to the 2019 UIM Rule Book....T Class starts on page 194. There is no change in the T750...
  13. T Class is a UIM World Class...the weights for...

    T Class is a UIM World Class...the weights for both T750 and T850 came from those rules. APBA similar classes were DE for T750 and EP for T850...I am not sure about the DE weight but APBA EP was 850...
  14. I still think we can help Tom and other current...

    I still think we can help Tom and other current and new racers in T750 class if we increased the minimum weight from 500 lbs to 625 lbs. Unlike our T850 class which has a surplus of horsepower that...
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    Currently on eBay there are mid 1990 55 hp lower...

    Currently on eBay there are mid 1990 55 hp lower units and they are both 2 bar units. My 1994 70CES lower unit is a 2 bar only the first bar is cut out a bit. These lower units were used with the 6F0...
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    You likely are not running the short shaft...

    You likely are not running the short shaft muffler. That is the reason for the noise. The muffler is still available. The 70CES model had no muffler. The 50G and 70B short shafts had the muffler. You...
  17. It is impressive how the 3 cylinder 42 cubic inch...

    It is impressive how the 3 cylinder 42 cubic inch Yamaha and especially the 50 hp Tohatsu have broken many of the speed records in the last few years.
    In 2013 a 50 hp Tohatsu raised the speed record...
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    How have you made out with the rebuild? Were you...

    How have you made out with the rebuild? Were you able to find new parts and gaskets for the motor? Were you able to confirm that the motor is 750 cc?
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    Here's is what WE know about the twin Yamahas. -...

    Here's is what WE know about the twin Yamahas.
    - in the late 1970's to early 1980's Yamaha made the displacement larger
    - the block was the 6F0 ....60C Yamaha....60E Mariner
    - it was still 60 hp...
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    IF? Yours is an original 60de you already have...

    IF? Yours is an original 60de you already have the best model. Your motor has all the good parts. Please post pictures and port measurements. We have never seen the inside of an 6f1 powerhead. Thanks...
  21. THE DT65 TWIN CYLINDER 65 HP SUZUKI......EARLY 1980's

    This motor is a legal motor for our T750 class here in Ontario. No body has raced one yet and most know nothing about them.
    I believe Ron Hill's wife set the world record for hard bottom inflatable...
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    Have you built any MKX boats?

    Have you built any MKX boats?
  23. Replies
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    http://www.boatracingfacts.com/forums/showthread.p...

    http://www.boatracingfacts.com/forums/showthread.php?18347-Any-up-date-on-high-compression-pistons-in-59-cu-In-Mercury
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    Thank you for the reply. Would this be a MK8...

    Thank you for the reply.
    Would this be a MK8 hull?
    http://baatplassen.no/bildearkiv/21/21666/5655.jpg
    Will you be showing a picture of the MKX model?
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    There is not a lot to work with because of the...

    There is not a lot to work with because of the design of that motor. A better choice in my view of a similar size motor would be the yamaha/mariner 40 hp 2 cylinder.
    I don't know if anyone has tried...
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    Any new GT30 Hulls appear in 2017?

    Povvat Race Boats purchased the Winrace MK 9 molds a few years ago. I noticed those hulls finished first and second in the European Championship in 2017. In some pictures the hull looks wider...
  27. At the 2018 APBA convention coming next year they...

    At the 2018 APBA convention coming next year they have set times to discuss New Classes. In my view the key to success is junior grass roots classes. Make it easy to start a new class. Any UIM or...
  28. Spoke with them a few weeks ago. It would be too...

    Spoke with them a few weeks ago. It would be too much work for a 1 time event. The new boats would need to be built. I would want the session group to be in both clubs. The clubs may not want all the...
  29. One of our race clubs here is a Drag Event Club....

    One of our race clubs here is a Drag Event Club. They have drag and circle races plus interesting side shows as part of the event. They have been very successful and have attracted new fans and...
  30. Thanks Ron for the props offer. There are several...

    Thanks Ron for the props offer. There are several reasons for not scoring.
    - many young people are not competitive and this will encourage them to try our sport.
    - its is called a group session...
  31. New ideas, current classes and new classes in Ontario Canada

    I have continued to offer ideas to the race group up here. I still find it strange that our governing body and most of our race clubs operate backwards compared to other organizations. Other...
  32. Replies
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    Having Mike Wienandt add posts to this thread...

    Having Mike Wienandt add posts to this thread has confirmed most of the findings posted on other threads about the 3 cylinder 56 cubic inch OMC. The SST 60 is a spec motor and you must use original...
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    I would not be surprised if I was. That was...

    I would not be surprised if I was. That was several years ago and the complete process took about an hour. The owner had the outfit there for a bad cdi box. They had the motor on the dyno to test the...
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    Provided the 1987 70 hp is a 56 cubic inch...it...

    Provided the 1987 70 hp is a 56 cubic inch...it will have the big carbs...most likely they have a 69 main jet. The oval port loves fuel so I would run a 75 or larger jet with those carbs to start...
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    Between 5500 and 5800 as I recall.

    Between 5500 and 5800 as I recall.
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    In 2004 we tested a prop dynomonitor on a 70 hp...

    In 2004 we tested a prop dynomonitor on a 70 hp oval port. It measured 71 hp at the prop. The only change we did was put SST 60 carbs with 75 main jets and it tested at 79 hp at the prop. This as a...
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    I did reply to your private messages. The two...

    I did reply to your private messages. The two motors you have are different and I am surprised you got 6F0 parts and gaskets easily. Good for you. The exhausts are different. One is the single piece...
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    You replace the complete clamp bracket assembly....

    You replace the complete clamp bracket assembly. The 55 hp mid is almost exactly the same as the 90 Yamaha. So you can use 70, 90 or late model 55 Yamaha. The problem is taking the old parts off your...
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    You have some options: - the old style twin ram...

    You have some options:
    - the old style twin ram Mercury fits
    - as Fred mention.. the Pro 50 can be modified to fit You switch the lower yoke on the steering arm and make the two top bolt hole a...
  40. Thanks Ron, yes we are alike! We both want to...

    Thanks Ron, yes we are alike! We both want to promote our sport. Our Drag group here is finalizing 2 additional 660 Drag races this summer and T Class is included. Any accident where someone is hurt...
  41. Performance Improvements possible with newer 4 stroke outboards

    Up here the new generation of racers are not interested it the old school 2 stroke motors. They would like to use their lap top and reprogram their motor same as they do with their cars. They don't...
  42. This thread is about the 42 mod to 49 conversion....

    This thread is about the 42 mod to 49 conversion. It is said to produce horsepower in the 75 range. I posted the Hydro Tec motor since it was posted in the ad at 75 hp. I wondered if it was a big...
  43. NOW THE MOTOR ON THIS BOAT IS INTERESTING!! Look...

    NOW THE MOTOR ON THIS BOAT IS INTERESTING!!
    Look at the horsepower listed. 75 HP

    http://www.screamandfly.com/showthread.php?326463-Mirage-Tomcat-with-Yamaha-50hp

    The mid is a 50 hp short...
  44. Thread: pro 50 trim

    by Hounddog
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    The T750 racers up here running the 2 cylinder...

    The T750 racers up here running the 2 cylinder OMCs do like the later 90's OMC 2 cylinder short shaft trim. One problem all the 15 inch mid fellows have when using a long shaft model trim assembly is...
  45. Thread: pro 50 trim

    by Hounddog
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    The T850 racers in Canada use the Pro 50 Yamaha...

    The T850 racers in Canada use the Pro 50 Yamaha power trim.
    This is the model
    http://www.boats.net/parts/search/Yamaha/Outboard/1988/PRO50LG/BRACKET/parts.html
    There are a number of reasons:
    - it...
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    This likely is the same as the 70CES case. It has...

    This likely is the same as the 70CES case. It has to be the turn to shift gear case. The only difference is the length of the spline. The 70 hp is longer and round at the top. The 60 has a flat top....
  47. How would you of answered each of those questions...

    How would you of answered each of those questions differently ?
    Then I might be able to u derstand it from Your side.

    Racers are in competition with each other. They have a set of rules they must...
  48. Phill, there is nothing wrong with your answers....

    Phill, there is nothing wrong with your answers. Pleasure boaters have different needs and don't think the same way as racers and racers don't always agree with each other.
  49. As you study here are a few things to find out...

    As you study here are a few things to find out about.
    - which is richer 100 to 1 or 50 to 1
    - most commercial two stokes are premix, have lower compression and larger jets...why?
    - if you have a...
  50. Your still testing similar style carbs. Try the...

    Your still testing similar style carbs. Try the older SST 60 style carbs.
    If the oval port 70 hp carbs are the same as the older carbs, then you should be able to run a 69D jet.
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