Well Mr Opposed the ’51/’52 fasttwin were the “not so fast” fasttwin. I have one of those. I think it’s main claim to fame was its gear shift. The gearcase was shared with Johnson for the first time. The ’53/’54 fasttwin was a big improvement. Still not as fast as a Mercury but better than the 14s. The 15 had the throttle and the timing synchronized. These 15 were the start of some great running motors IMHO! I have two of those. This power head was used well into the 70s.
dale
“Crowded elevator smell different to midget!” Confucius
Labrador Guy wrote “This power head was used well into the 70s.”
I knew the old 15 power head was revived by Gale 1960-63, and that (hood shape and all) was revived (1965 thru 68??) as the Evinrude Worktwin and Johnson Workhorse, but available info on those commercial models is pretty slim, and I wasn’t aware of it being built after 1968.