Auto Fuel STC Engine Swap

[nippaero]

If i purchase the STC for my plane now with a C-145-2H motor in it and I swap later this year to an O-300B will the STC have to be repurchased again for the new motor?

[nippaero]

I think I answered my own question. I called up Petersen and the STC is tied to the S/N of the aircraft+Motor. If I swap motors it will be $145 to redo the STC to the new engine.

[Bruce Fenstermacher]

That is if you buy the Peterson STC. I'd buy the EAA STC and don't ask questions. As far as you know the 0-C-145-2H and the 0-300-b are the same engine covered under the STC application chart. If my plane had the Peterson STC I'd still use the same logic.