Quote:
Originally Posted by G32
GearRat: Con rod # to confirm the 100 Hp 59 crankshaft is 99A or 29A ( may
be stamped 99A).
90 hp 221 crank is 91A or 21A { may be stamped 91A}
Enjoy 35!
Gene Tulsa
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Hey Gene,
The # I found on the rod ends was 99, but i'm not sure if there was an "A" by them or a triangle. The bore from what I measured was around 3.218", mind you that probably isn't very accurate, but it is a larger bore. My grandfather had this engine rebuilt in the 1980's so chances are there were a few up-grades like valve rotators and such.
-Garrett