jimmyb865 wrote:
Ginch wrote:
I just saw this posted by Sir Paul and thought it's a useful trick for eliminating a possible problem.
100 percent.
Been saying this forever.
Whenever a "how to clean exhaust" comes up I say don't waste the time, find a good clean used/or new pipe. It is also difficult to tune a carb if your pipe is shot. Also if you have a silencer can and its old, the glass packing and baffle holes are probably sooted and clogged.
Big YES on the Check The Muffler! when trouble shooting. The last time this bit me, all was working fine when all of a sudden my motor didn't want to run(in motor stand). You need spark (at right time), air & gas so I checked and HAD all that, but motor would idle for a minute then die, right away if you tried to open throttle. Finally changed the muffler and it ran fine again.
Unofficial Crude test for plugged muffler:
Take a couple of tight wraps of masking tape around the exit tip. Now you have a 'clean' mouthpiece, pucker up and BLOW as hard as you can thru the muffler. There should be no noticable restriction. Both the clogged ones I've encountered were obvious when tested this way.
Big MAYBE on wasting time with 'plugged' muffs - I've saved a couple this way

FIRE shoots out the tip!
Afterwards rap around edge seam w/ a hammer, shake crap out, then final flush w/ compressed air & shop vac to suit. But no wood stove available, Jimmy's right. I'm no fan of oven cleaners or Drano for this.