Studless Muffler??

[cessna170bdriver]

Several months ago, I bought a muffer from a 1952(?) C-145 installation, and I'm just now getting around to sending it off to have it overhauled. I opened the shroud and noticed that this muffler doesn't have any of the heat-transfer studs that are on both of my mufflers. Has anyone seen one like that before? Also note the different design of riser clamp that only requires two bolts.

[cessna170bdriver]

Arash, David Ross (bagarre) probably has more of those clamps if you can talk him out of them.

[johneeb]

http://www.wagaero.com/engine-parts/exh ... pma-d.html

Arish, I have used these clamps for a long time, half as much screwing!

[blueldr]

The first time I had a opportunity to work on my airpane I found one of the riser clamps with a bolt hole broken off. I went to Kenny Faeth's junk yard for a half clamp replacement and found a batch of two bolt clamps and bought enough to do the whole engine. Only half as many hard to get at bolts to have to tighten.

[bagarre]

Bought them at wag aero two annuals ago at the link mentioned above.

I didn't think about the mufflers being studless at the time. No log book entries about new mufflers so I assume (heh) they are stock or came with the O300 conversion in the 1970s.

[HA]

I have a studless muffler on the side that gives carb heat. regular studded type on the cabin heat muffler.

thanks for the link on the 2-bolt clamps, I think those will be well worth it.