sorry i cant find the wanted adds but im in need of an os 744 muffler for a old airplane that i bought. can anybody help me please. thanks.

What OS engine does the muffler fit? Thanks Dave

there is a 744 bolt throught for SF engines on forward and a bolt on for the SR and FSR series

i think its the fsr. not sure. i no its a .61. its an old plane.

The O.S. #744 muffler was for the .61FSR. The #744B was the one on the .61SF/RF engines. The "B" part wasn't cast into the muffler, though. However, if the holed in the muffler are threaded, you have the #744B muffler. Other than that, they are identical.

thanks. it is threaded. i will look for one of those.

Are you looking to buy one? Is 744 stamped on it? I have a box full of mufflers and some are older ones. I can take a look and see what I have.

yes i am. yes it is. and the holes are threaded. thanks.[img][/img]

do an ebay search. I had a buddy have me look there for him and there is one or more. I ended up needing a different one though. so it should still be there. be sure to include ebay stores. SF 61 is a great old motor!

I found one. It has threads in it. It does not have the little back pressure nipple, but I imagine I have one that will work.

what would you want for it.

I sent you a PM so we could figure out details.