I thing that what is the norm for Ercoupes is 48 to 51 and anything in between is OK. Alon, Or my Alon came out with a 53 on it from Alon. Per Equip. list. Personally I think that If you own an Ercoupe family aircraft
that the books pertaining to your model would be worth the money. You can find almost all the answers in them. Skyport or Univair both have the sets for C thur M-10. Yours, Warren H.
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