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Thread: Origin of OMC Triumph 55
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05-25-2009, 09:15 AM #31Member
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05-25-2009, 09:21 AM #32Member
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05-25-2009, 09:29 AM #337000 RPM
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how that 650 cross flow comes up when talkin about a looper with a head gasket, i'll never know.
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05-25-2009, 10:02 AM #34
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05-25-2009, 05:31 PM #35
75/650
Hard to read but I say this rules. show me what the 650xs did in stock, I can't remember if they were approved for SE FE. When they first came out an older guy name Red Mcntier from Columbia SC who always ran a 44 Merc. bought one an ran it in NOA an outlaw races. When the 700 came out a lot of people said he had one with a 650 cowl. At one race a guy ask Red was it a 650 or 700, Red looked at him an just said can't you read. I always though this was funny.
Last edited by php; 07-02-2009 at 01:37 PM.
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07-02-2009, 02:39 AM #36
We have a 75 Evinrude from 1978 on a 16" Banda. Runs a Cleaver 22 at 6500 rpm without hesitations. I look for a OMC 23 inch cleaver to test with. Only mods are nosecone and the engine is bored out to get higher compression.
My son run it in Classic Offshore here in Sweden.
Back in the days these engines ruled the E-class.
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07-02-2009, 08:07 AM #375000 RPM
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'cause someone said the looper ruled E racing, which isn't so
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07-02-2009, 09:55 PM #385000 RPM
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Outside of the USA.
Canada, Europe and Australia.
In Canada the Merc 650XS's and the OMC's went head to head for many many years.
ALLSTAR wrote; I always wanted to move up to a SE tunnel boat. What a great package Seebold tunnel and 75 Stinger.
There were quite a few Seebold Se boats with Evinrudes; there were about 16 to 18 made for 'The Race of Champions' and I wish I knew how many were made for the Jeff Brown promo.
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07-20-2009, 01:09 AM #39New Member
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What is surprizing to me is how long it took for outboard engine builders to get on board with so called "loop scavenging" considering it was pre WWII technology. DKW had it in the 30's. Invented by a fellow named Schnurle as I recall.
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07-20-2009, 07:28 AM #40
It was used in outboards made in Europe for decades before it came to the US. The main reason it became popular in the US had nothing to do with it's application, but rather its manufacture.
New casting techniques made it cost effective in the high volumes done by US makers. Crossflow motors had been radically less expensive to manufacture before that time.
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07-20-2009, 09:14 AM #41New Member
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Good reason
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07-20-2009, 11:07 PM #42
Back to SE/FE and the 650x
I ran FE in the early 80's, spent quite a few years in that era around and in OPC racing in South Florida. I don't ever remember a Merc being competitive in SE or FE, at least once the 75s were established. I do think that they went head to head in Mod 50, though we rarely saw that class, but those were often either factory drivers or "factory" drivers and who knew what was really in those engines.
Sometime after OMC came out with the 49 ci motor, they changed the D class from uner 40 ci to under 44 or 45, whatever it took to give a place for all of those 4 cylnder Merc 50s not to become obsolete. Of course, the down side is two more classes to split up the number of people who raced.
To me the interesting comparison was FE/SE with SG/FG--the latter with the 85 4 cyl Mercury. Those two classes, with the added length and weight for the G class, ran very close to each other. The best G drivers would eventually outrun the best E drivers, but they were very close. But, once again, you had the same group of drivers with about the same boats running four classes instead of two, and fewer boats per class.Per Rock:
"Once I bought my first Hydrostream boating changed forever for me."
Per my hero Instigator:
"I try not to let common sense interfere w/my boat buying decisions."
Pat Gent
cell 954-249-3246
'78 Hydrostream Vandal (being rebuilt)
'86 21' Eliminator Daytona, 300 OMC V-8 (Li'l Toy III)
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08-10-2009, 10:23 AM #43Member
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And to think charlie stang left merc to do this great motor. just think what could have happened if charlie would have stayed with merc and could have gotton along with carl and left jack hannigan and brunswick out of the picture.
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08-10-2009, 10:29 AM #44Member
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I can remember when merc ran a v6 on 3 cylinders agains these omc;s and cleaned house. in fact it was on tv i saw it happen. did merc get to keep using the 3 cylinder v6?
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08-10-2009, 10:32 AM #45
I don't think there was ever anyone who "got along" with Carl better than Charlie (other than Rose)
Brunswick & Hannigan pushing deeper into Merc was inevitable, I don't think Charlie could have done anything about it.
The temptation to become Ralph Evinrude's successor at OMC was probably too much for Charlie to resist ... that probably started about the time Brunswick acquired Merc