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Thankyou frankr
It is good to know that the newer pistons an rods can be used in the older motors.This is valuable info.I have learned a lot from you all about these motors an how to ,an what to do and not to do..I sure hope the 1956 10hp. holds up….if not i now know how to start to fix it…Thankyou again…all of you..for the valuable info
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It is easy to determine if you old 10hp has loose wrist pin issues. Get the pistons in mid travel (with the plugs out), and rock the crank back and forth just slightly to feel for slop. You can usually hear a ticking noise while the engine is idling if you have this issue as well. I use 16:1 in my older 10hps, hoping the extra oil might help protect against this issue.