Echo Chainsaw Muffler Mod

Doing a test run of the Echo CS-490 after modding the muffler.

[@FYMM69]

Nice attempt but that saws muffler still sounds Way restricted and needs to have the spark arrestor thrown out because it does restrict air flow. Not sure if you still have the high speed jet too far but it sounds burbling rich and not near what it should be running

[@tedmiller1745]

So what do you say about the mod he did? Just do the same and toss the spark arrestor?

[@FYMM69]

@@tedmiller1745it’s hard to tell how his carb is tuned because he has it loaded in the wood. Be better if we could hear it running wide open with no load on it.
That exhaust is so badly restricted For Sure with that spark arrestor still in there. Saw companies put them in there for liability only. First thing any pro does when first buying a saw is throw those things in the garbage because you might as well leave the saw stock. Muffler Has to breathe and this fellas saw is choked off.

[@cmcg1190]

great video, thanks... did you find any loss of compression after doing your mod?

[@HilltownCT]

Thanks, no difference.

[@johnpion7694]

Sounds to rich, drill a couple of holes besides the cat and retune without the limiter caps. then put em back in.

[@D70340]

Remove the cat out of the muffler, then lose the limiter caps off the H/L fuel mixture screws and retune it. Its very evident its still restricted, and its 4 stroking terrible.

[@moosekiller2004]

There is no cat in that muffler

[@drga6246]

Ti si pametniji od 1000 inžinjera u echu