Originally Posted by
russhill
Sam, You're right, as usual about the old opposed K40 (I didn't know there was a KR40.)
I don't agree about the Vs. Yes there was a V45 and V50, but I don't think there was a VR until '31. What gearcase did it use? The V45 was a "small valve" 25 HP. It used a full speed rotary valve, as contrasted with the "big valves" which ran half engine speed and were called 32HP. I don't know which valve was used on the 1930 V50s.
As for the class rule, it was definitely 14 inches. We helped get the rule changed allow the Mercuries to compete legally in the early '50s.
I wish this stuff were better documented.
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