David_V 1 #1 Posted March 29, 2013 I have a C81. The mushroom muffler rotted out. I stuck a straight through muffler on it. The motor has a 1 inch NPT pipe coming out and I used a reducer to get the 1/2 NPT inlet of the muffler on that pipe. Is that going to cause any problems? Should I look for the correct muffler or just one with a 1 inch NPT inlet? Share this post Link to post Share on other sites
pfrederi 17,164 #2 Posted March 29, 2013 Restricting Exhaust flow is not a good idea. Mufflers are reasonably priced vs having to replace burned exhaust valves or damage valve seats. Share this post Link to post Share on other sites
SousaKerry 500 #3 Posted March 29, 2013 Do not reduce your exhaust size, nasty things will happen to your engine not to mention the lack of performance cause it can't breathe. Share this post Link to post Share on other sites
ericj 1,576 #4 Posted March 29, 2013 don't reduce the size not a good idea tractor will not make power and could cause problems with the motor's valve train among others eric j Share this post Link to post Share on other sites
David_V 1 #5 Posted March 29, 2013 OK. I'm on the way to the store to buy a new muffler. Thanks. Share this post Link to post Share on other sites
