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  1. I was thinking about how to do this the other...

    I was thinking about how to do this the other day..
    I need a signal/trigger that is TDC, so I can compare it to the ignition timing trigger.
  2. older UIM engine homologation documents

    Does anyone have anything older than the 1983 UIM #309 that is available here?
    https://www.uim.sport/Homologation1.aspx

    Actually, I'd be looking for anything not currently available.

    please PM...
  3. GearPros gears for OMC SST60 and Nitro

    Has anyone tried these out?

    Any comments / reviews / thoughts?

    https://gearprosinc.com/shop/ols/products/sst60-3
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    Some more history related to this motor, and two...

    Some more history related to this motor, and two racers I wish I was able to speak to.

    75652
  5. Super Stock

    Here are some pics from assembling a short shaft from a long shaft. This was a few years ago. I'm adhering to our "Super Stock" racing rules. Basically the powerhead has to be stock, and/or built...
  6. All the 60hp models from around 1980/1981 came...

    All the 60hp models from around 1980/1981 came with the 1.71 "675" gears. 60A "675" and 60C "6F0" (the two I own, all original) as well as the 60D "6F1".

    Racers probably saw that due to the power...
  7. Yes, but only at a later date. It never came with...

    Yes, but only at a later date. It never came with 2:1 gears from the factory. The RYA homologation that includes the 2:1 gears clearly states those gears are from the 40F "679" model, and in fact...
  8. Part 22 Walter Blankenstein January 1909 - 1977 (68)

    United States Navy - 4 years during late 20’s & early 30’s.

    Thanks to Ralph Donald, Bill Hosler, Melvin Cooper, R.C. Hawie and Fred Brinkman for contributing stories on Walt Blankenstein. Walt was...
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    One thing that came to mind with the E-tec blocks...

    One thing that came to mind with the E-tec blocks is whether or not the oiling locations from the oil injection are strategic in the design in such a way were you NEED to oil those locations in a...
  10. David Tenney Racing Bio

    David Tenney, born in Minneapolis, MN on July 11, 1958 is an American racer that has competed in karts, sports cars, and outboard racing boats.

    1975 - 1981

    David raced karts in the Midwest
    ...
  11. Photos - 29 and 69

    This is the same boat as in the earlier photo with the Mk 25. I refinished the plywood deck, replaced the canvas deck and replaced 1/3 of the bottom plywood As the boat had been badly damaged in a...
  12. This is loaded with good photos and information:...

    This is loaded with good photos and information:

    http://www.fralickracing.com/our-founder.html
  13. Part 21 - Rick Fralick, Picton, Ontario, Canada , born April 1, 1944 (76)

    Thanks to Rick and Andrew Fralick for supplying the information on Rick Fralick and recommendation by Brian Hendrick.


    Picton, Ontario - I live on the race course where Miss Canada IV set a world...
  14. Part 20B - Bill Tenney and David Tenney

    Tonights “a little history” will be done in two separate emails. Part 20B continuation of Bill Tenney/David Tenney Racing and 21 Rick Fralick, Picton, Ontario, Canada. In both cases I am going to...
  15. 75601

    75601
  16. Document Scan22

    attached:
  17. Part 20 Bill Tenney, Crystal Bay, Minnesota May 3, 1915 - July 24, 1993 (78)

    Thanks to David Tenney (son to Bill Tenney) for supplying the biography, letter and photos. The link below the bio tells the story on Scott-Atwater’s attempt for a speed record and Bill Tenney’s part...
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    This is the boat, motor, and driver that set the...

    This is the boat, motor, and driver that set the record shown in the first post in this thread:

    https://www.youtube.com/watch?v=hFUgbrZRakE

    Amazing that this video exists.
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    Some more history regarding the 60D (6F1): The...

    Some more history regarding the 60D (6F1):
    The 60D (6F1) came with 1.85 gears from the factory (13:24). I'm guessing some racers lobbied to have the 13:26 gears from the 2cyl 40hp (679) officially...
  20. To clarify and correct for historical purposes,...

    To clarify and correct for historical purposes, the 60D (6F1) came with 1.85 gears from the factory (13:24). I'm guessing some racers lobbied to have the 13:26 gears from the 2cyl 40hp (679)...
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    The above posts have been updated.

    The above posts have been updated.
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    photos

    photos
  23. I recently re-read this whole thread and want to...

    I recently re-read this whole thread and want to clarify a few things I've found more recently.

    There are claims in this thread the 6F1/60DES tuner was dual horn - it is not - you can find pics...
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    I had a great person help out and measure a new...

    I had a great person help out and measure a new old stock 6F1 piston, and as per speculation, the 60DES bores were 81.30mm for a displacement closer to 747 or 750cc..
    Stroke and rods are the same as...
  25. I had a great person help out and measure a new...

    I had a great person help out and measure a new old stock 6F1 piston, and as per speculation, the 60DES bores were 81.30mm for a displacement closer to 747 or 750cc..
    Stroke and rods are the same as...
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    Looks like the gaskets are the same part number....

    Looks like the gaskets are the same part number. For example - both 1983 60hp, and 2011 Etec 2cyl - same gasket.
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    those screws holding the butterfly on do not look...

    those screws holding the butterfly on do not look factory stock
  28. That's amazing Marc, thanks so much!! Jody...

    That's amazing Marc, thanks so much!!

    Jody Sanders has posted a couple more times on FB, and with your contribution, we now have a great collection of info.

    Please don't hesitate to post any...
  29. There was a post on FB couple weeks ago by Jody...

    There was a post on FB couple weeks ago by Jody Sanders, the son of Bob Sanders:
  30. They did. Older Mariner 60hp (I have one in...

    They did. Older Mariner 60hp (I have one in hand), and I think the newer 50G 850cc 50hp in the UK.
  31. New parts for a short Yamaha 3cyl 70 are still...

    New parts for a short Yamaha 3cyl 70 are still available, but you'd have to piece it together.. Buying these parts new isn't very cheap.
    Start with a 20in 70hp, find a used 55hp small lower unit,...
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    Many kinds of piston designs for the 49ci.. Far...

    Many kinds of piston designs for the 49ci..
    Far left is the 3 ring 1968 55hp, far right is the 1975hp Stinger piston (high top ring, flat top).
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    factory exhaust port chamfers

    Old thread, I know.., but wanted to add this as I had not found pics of these details online..

    I've been searching for photos of this for a while and finally got to see it first hand (thanks...
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    Sometimes you can get an indication from...

    Sometimes you can get an indication from comparing the parts catalogs for both motors. Looks like the driveshaft top bearing is shared as well as the shims in that location, but the lower bearing...
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    I had brought 2 shafts in with me to get a quote,...

    I had brought 2 shafts in with me to get a quote, and it was approx 1.5 or 2 hours of shop time for both (approx $95 CAD per shaft). Turns out, for a single driveshaft, that's about half the price...
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    I had success finding a machine shop that...

    I had success finding a machine shop that specializes in gears and shafts. They shortened a couple drive shafts and matched the splines to the original. I did provide a spare crank to help them to...
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    I'm running a muffler and it is loud when...

    I'm running a muffler and it is loud when running. It is a stock 20" 3cyl 70 with a 2cyl lower. No mods, all original.

    Maybe no muffler affects the exhaust relief just below the lower cowl/pan...
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    The muffler doesn't matter as much as the actual...

    The muffler doesn't matter as much as the actual midsection "upper casing". It is the mid that has the baffles and exhaust outlet that determines the exhaust flow outlet location. It is also the...
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    So based on your two photos above, I have the...

    So based on your two photos above, I have the exact same configurations..
    You can see that some of the exhaust from the 70 3cyl mid will flow rearward of the baffle/wall between the two bolt holes,...
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    I run a 55/60 2cyl lower on a 70hp 3cyl. It is...

    I run a 55/60 2cyl lower on a 70hp 3cyl. It is also loud. I am pretty sure it is that the gearcase casing has a wall/baffle in a different location from the stock 70hp lower, does not line up with...
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    Very similar, yes. not Exactly the same. Likely...

    Very similar, yes. not Exactly the same. Likely more differences between the 60D/60DE (6F1) and the regular 48/55/60 2Cyl than the differences between the 70CES (6J2) and the regular 70hp (6H3).
    ...
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    Yamaha 60hp Wins British National

    1981
    69831
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    Incredible Yamaha 60D (1983)

    69830
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    Yamaha 60DES S750 UIM Speed Record 1986

    found this in an old Yamaha publication.

    69826
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    Already done that. Also tried both partially...

    Already done that. Also tried both partially blocked inserts and stock inserts. Looking for peoples' opinions on the specifics in my original post. Wanna know what they've found trying various...
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    Don't think our rules will allow that. ...

    Don't think our rules will allow that.

    Wondering mostly if people run with fully stock water pickup inserts, without a nose cone, and if they have any issues running the prop shaft high for a...
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    bump. still looking for opinions.

    bump.
    still looking for opinions.
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    I think the process will depend on what type of...

    I think the process will depend on what type of hub/spline configuration it has (in terms of how it is made/assembled)..
    If you can post a photo, or a part number we can use to look for a photo,...
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    1996 60hp 52ci are WME-45 on the motor I can see...

    1996 60hp 52ci are WME-45 on the motor I can see with my own eyeballs.
    Looks like early 59ci are WME-58 for electric start 60hp, and WME-57 for the manual start 55/60hp, according to parts catalogs....
  50. After asking around and searching for info, I...

    After asking around and searching for info, I have a feeling that the 6F1 was unique in that the displacement was exactly 750cc - It had slightly smaller bore pistons than the very common 760cc 82mm...
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