john keller

been flying saito 120 and 180 for 3 years. never could keep a muffler on. ruined threads and lost mufflers. saito 180 is worse. FINALLY, looks like I may have it solved:

extra strength red locktite ( 550 degrees ) works. also have always had problems with exhaust deflectors. nothing stays on and the extra weight vibrates the muffler loose. did this: installed 1/2 inch ID stainless flex gas pipe. comes with fittings. remove them. do not, do not clamp the flex to the muffler. leave loose and secure flex to landing gear or under the plane somewhere with a stainless hose clamp screwed to bottom. the flex pipe is strong enough to stay in place over the muffler outlet and lets the muffler vibrate within the flex with no strain on the muffler.

Also drilled and tapped the muffler to the header pipe and used locktite there also.

ronwc

My Feedback: (404)

Had a Saito 91 on a Midwest Citabria that the muffler fell off in flight. I put about 4" of tubing to get exhaust out of the cowl, retuned engine (no pressure, no problem)somewhat and flew without muffler. It sounded better and gained abiut 1000 RPM.

greenboot

My Feedback: (1)

On both my OS91fs and Saito 150, I use a short piece of aluminum tubing. Get a size that won't quite slide on so the threads will cut in slightly. Then put a slit about 1/2" long in the end of the tube. Use a muffler clamp to hold it tight. Sounds great and cheap to replace if it does fall off.

Tom

rc-sport

My Feedback: (12)

I have heard of this problem before, I have 4 Saitos and have yet to have a muffler come loose. All I do is crank the lock nuts real tight.

GalenB

My Feedback: (18)

You might try the old trick to keep YS mufflers on -- teflon tape.