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The rest of the story! Thanks FrankR! I knew I had chased this before. The first piston number #593434 doesn’t go anywhere as you stated. The second one #593567 SS to a piston kit #384698 which has 2 pistons, wrist pins, & rings with instructions to install all as a kit. That number is the same as J/E 40hp motors of the era & stayed the same for a long time after. The #378430 rings SS to #308108 which are still good today, but no oversize are shown so Chris, I do not know where your .040 pistons came from in your motor unless it is a 35hp in disguise? Does it have the big crank?
FrankR do you have the bore & stroke handy on the 40hp Gale engine from the early 60s? Hard to believe it would be different!
Thanks!
Dan in TN