Quote:
The 25 was done in only cabin model with twin I/O's inline 6's = not enough power but all they had back then.
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Ditto the standard power on the 27' SeaCraft SeaMaster flybridge model. Twin 165hp Mercruisers with 250ci I6 Chevy-block motors. (Which blocks, by the way, were available from 1969 to 1974 as 250hp I6 sterndrives)
The Royal Bahamian Defence Force has a 1970 27' SeaMaster that was repowered in early '95with twin outboards, transom mounted. The transom was entirely rebuilt to hang twin 30" outboards, no bracket.
It was first repowered back in '94 with twin 25" shaft 275 hp 3.4L V6 Mercs with extension kits, it was later repowered with twin 30" 300hp HPDI Yamahas, I think in '02. I have no information on the performance with the Yamahas, but with the twin Mercs it ran about 39-40 knots.
I know they got their original 3.4L Mercs off of my 34' Scarab Raider after I bought it from the US Customs service at auction in '94, when I lived at Compass Point on New Providence Island.
__________________
Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury