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I think Dave is right on the props, BP/std LU

Or excessively long boring monologs, I don't know which:confused:

Oh, one thing I omitted ... I intended to thank 2 guys that really educated me on these: Norris Wallace (Raceman) and Dave Schwarz...

I added the images above. #1 is obviously the Sportmaster. #2 is the 1961 Speedmaster (arrow points to the water inlet on the housing instead of nose cone). Bottom diagram image is from the Super...

When the first Merc 6 cylinder motor was introduced in 1956, Merc's chief engineer promised that there would eventually be 2 special high speed lower units for them. The stock lower units were very...