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...brand new pair of Mercury Hi-Performance 750 EFI's...new skate board?...no thanks...;)...https://www.offshoreonly.com/forums/...efis-kenny.jpg
1959, a few years before stacks were used on Mercs; even F Alky didn't have stacks at that time. Merc made a full open exhaust as an accessory for the Mark75H, but only a very few racers used them. Only the Anzanis and Konigs had megaphones at that time and even the Carnitis didn't yet have expansion chambers. By 1962 if you didn't have tuned exhaust pipes on your Alky, you were in the back of the pack.Quote:
Originally Posted by 2us70
There was an F Stock class in the mid-1950's but it faded out before the 75H was the big deal. I don't remember if 58, 59 or 60 was the last year of F Stock, but it never caught on and was dropped.
An old friend of mine raced way back in the 40s and early 50s. He told me that he remembered F Outboard running 4 cyl opposed Johnsons back then. Never saw one run. By the time I started racing all of the alky outboard classes ran some type of stacks or expansion chambers.
The F class OMC and Evinrude motors were competitive until the early 1960's in Alky
Quote:
Originally Posted by Mark75H
Didn't the first Entrop Record boat use open stacks? We had them in Miami on a M78 on a 1949 Raveau in 58-59. Out ran the factory Raveaus with 75H motors in the 9 hour race 1958, until we hit a Palm fron.