Btw, what does the O-200 do to the useful load of a 415D anyway?


The O-200 is within a pound or two of the C-85.




Ok, but does the 0-200 STC increase the gross weight of the plane?

No not in itself. However in order to install an 0-200, the plane must be
converted to, or be a "D" model which has 1400# gross weight rather than the
1260 of the "C" or "C-D"
Coupes.

Paul
N1431A