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  1. #181
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    Quote Originally Posted by lars strom View Post
    I don't think OMC put any effort in to racing with the 2 cylinder looper. My effort was mostly for fun. I hired the best 2 stroke tuner in Sweden but we could never get any better power out of the engine. The best engine for the UIM SD class was the Mariner 60 2 cyl.
    Sst45 Engines are about 70hp at the crank at 7000
    Plenty left as its a stock class

  2. #182
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    SST-45 is a different story and was based on the production 50/60 2 cylinder powerhead from 1980. No OMC modifications was done the the powerhead just stock.
    What made the SST-45 unique was the midsection/gear case but the powerhead was a production. I dont believe the 70HP.. maybe 60HP a very good day.
    My SD effort was based on the 55 from 1978. Not a good engine and was replaced with another "bad" powerhead 1979.
    We tried the new stock Evinrude 60 2 cyl. 1980 when it was released from OMC in the UIM SD class but the Mariner 60 was much faster. (Also 2 cyl).
    Bertil Wik was racing the Mariner 60 in the UIM SD class and he won every SD class race for years. He got the nick name "Super Bertil" from that era.
    Last edited by lars strom; 07-30-2017 at 10:28 PM.

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  4. #183
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    The SST-45 is using the powerhead from the 50/60 model year 1980 (picture). Its a better powerhead than 1978/79 but still not very powerful.
    The best way to tell a 78/79 from the 1980 model year is the 1980 have one bolt for the lift eye..the older two bolts.
    Worthless info but a fact.
    Attached Thumbnails Attached Thumbnails 50-60.jpg  

  5. #184
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    Evinrude and SST-45 was the start for F1 Shaun Torrente ..!!

    http://svera.se/blogg/evinrude-and-s...haun-torrente/
    Attached Thumbnails Attached Thumbnails shaun.jpg  

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  7. #185
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    it was Racer that told me, he has had dozens on his dyno all 70hp.
    it has more comp than stock plus the almost dry custom megaphone has to count for something
    The 45 block from 1986 is different than the original as its a permamold or lost foam with cast in exhaust.

  8. #186
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    Well the 1986 production 60HP is a down rated 3 cylinder and the 1986 production 2 cylinder is only 40/50 HP.
    The 1980 2 cyl block is more or less the same all the way up. First year with better sleeves and exhaust.
    Last edited by lars strom; 07-17-2017 at 09:38 AM.

  9. #187
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    The fist picture is the 1979 55 HP 2 cyl, with the old style exhaust manifold. The second picture is the 1980 50/60HP 2 cyl, and you can see the old style manifold is replaced with what you call lost foam with cast in exhaust.
    First year for this and a very reliable two cylinder engine but not a lot of horsepower.
    This was a big seller in Sweden and OMC replaced hundreds of 1979 powerheads with the new style (Warranty) More or less every 55-79 blow up.
    Attached Thumbnails Attached Thumbnails 79 2 cyl.jpg   1980 2 cyl.jpg  
    Last edited by lars strom; 07-17-2017 at 10:25 AM.

  10. #188
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    SST-45 was popular in Sweden also in the mid nighties. Here is Tobias Tejby racing. I was with Tobias in Cypress Gardens,FL 1995 for the SST-45 World Championship race.
    If I remember right was Duke Waldrop from OMC the officer of the day.
    Attached Thumbnails Attached Thumbnails SST-45 TT.jpg  
    Last edited by lars strom; 07-17-2017 at 10:24 AM.

  11. #189
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    Quote Originally Posted by lars strom View Post
    We tried the new stock Evinrude 60 2 cyl. 1980 when it was released from OMC in the UIM SD class but the Mariner 60 was much faster. (Also 2 cyl).
    Bertil Wik was racing the Mariner 60 in the UIM SD class and he won every SD class race for years. He got the nick name "Super Bertil" from that era.
    Bertil Wik in his very fast #3 SD class Mollgaard/Mariner 60
    Attached Thumbnails Attached Thumbnails Bertil SD.jpg  

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  13. #190
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    “Facts from the factory” 1978 by Mark Spencer.

    http://svera.se/blogg/facts-from-the...-mark-spencer/

    Jimbo McConnell in his OZ class # 191 Molinari / Evinrude V6 3 liter looper Fuel Injection.
    First picture

    Action was hot and heavy in the corners for the OZ class boats as Fred Hauenstein #68 and Ken Stevenson #201 fight it out in amazing similarly painted Johnson outboards.
    Both drivers was powered by OMC V6 3 liter looper Fuel Injection engines.
    Second picture




    Last edited by lars strom; 07-30-2017 at 10:29 PM.

  14. #191
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    What were the specs for UIM SD class?

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  16. #192
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    Don't remember 100% but it use to be max 700 cc production homologated engines. (Archimedes Penta was more or less the only engine for the class)
    Production gearcases with reverse. I think it was 1978 UIM raised to max cc to 750 so the new Evinrude and Mariner could be used. A minimum length and a minimum seating area was also in the rules for all S classes at that time.
    Last edited by lars strom; 07-17-2017 at 03:36 PM.

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  18. #193
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  19. #194
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    Quote Originally Posted by 2us70 View Post
    Did OMC have any luck in SD in the USA. I last ran the class in 1975 then a year in G Production then ran out money.
    I recall Burt Ross and his son Bobby running SD in Florida in the late 70's with OMC's. They ran "Bunkies" that I believe they kneeled in. Bobby blew over in Key West and was stung badly by jellyfish awaiting rescue. Don't have any pics of the SD's, but this was Burt's SE Bunky...

    Click image for larger version. 

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  20. #195
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    Here is some Scandinavian UIM SD race boats from 1976/77
    before UIM raised the cc to 750.
    Cats and V-bottoms was used. The #251 is under a record run 68 MPH.
    Attached Thumbnails Attached Thumbnails Penta SD.jpg   Penta SD V.jpg   Penta SD Record.jpg  
    Last edited by lars strom; 07-17-2017 at 03:37 PM.

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