On Sep 7, 6:27*pm, Kurt wrote:
We have 2 Pawnee's, both 235 HP fixed prop. *One has a problem with
carbon monoxide. *

Are you using the same measurement instrument in both aircraft? (not
the same type but actually the same instrument)

I fly 2 Pawnees at my club but I don't think either has a CO monitor.
Maybe I'll borrow one for my next tow duty.

Andy