The International Cessna 170 Association

butchpilot170 wrote:Hey thx Bagarre ! Maybe something will come along ! Someone told me that if you MOH a c-145 eng. you have to change the crankshaft = $$$$ . Could this be true ?

It is NOT true as long as the existing crankshaft passes inspection. If it doesn't pass inspection, you have to find a serviceable replacement (getting VERY difficult as time marches on), or purchase an IO-360 (Contintntal of course) crankshaft which is dimensionally identical to the C-145/O-300 crankshafts except that the front end has to be plugged to run a fixed pitch prop, and that it has a 6-bolt flange instead of the earlier models' 8-bolt flange. (IIRC, O-300C and later engines already have 6-bolt crankshafts.)

^^ What Miles said. The crank AD is on the IO-360 and not the O-300 nor C-145.
Usable 8 bolt cranks are getting very hard to come by tho.

Your A model might now have a 0-300 D but it did not come that way. Are you sure that is what is installed?