Muffler..no muffler? - Snowmobile Forum: Your #1 Snowmobile Forum

von diesel · 11-26-2012, 08:16 PM

Well here goes,my first question..
Sled is a 73 Mercury 440,all stock.
I would imagine being almost 40 years old the muffler is probably half full of oil and rust.
Now..even if I could find new exhaust it would be $$$$..I just want to ride it and have some fun.
I am in an area where no one will care if it's a bit loud.
Question is..can I run it w/o the muffler or do I need some fancy tuned exhaust?

Thanks for any response's

XCRacer440 · 11-26-2012, 08:39 PM

Why don't you just use the exhaust you have right now??? Why would you want to change it if it works?
And yes you need back pressure on a 2 stroke. It will have less power.
Unless your factory exhaust has too many holes to salvage, I suggest running what you have or fix the minor holes if it has any.

Grudman · 11-26-2012, 08:42 PM

If the muffler you have doesnt have any wholes in it run it the way it is. The oil will burn off once you start riding it and heating up the exhaust!

von diesel · 11-26-2012, 08:51 PM

yeah it doesn't look too bad,except at some point in it's life previous owner hit something with the front and the pipe leaks at the joint where the springs are.
probably be able to line it all back up,but if not...

I realize it needs the back pressure ,but Would it hurt to eliminate any of the 3 bends after the muffler if need be?

XCRacer440 · 11-26-2012, 10:34 PM

Where it leaks at the joint, use some high temp RTV. Used to have to do it on both my 98 XC 600's at the can, and my buddies 98 XC 700. It was common for the U pipe to leak.
I am not sure what the 3 bends after the muffler means. Are you saying the pipe itself has 3 bends, or does it really have 3 bends after the muffler itself? That would be really odd if that was the case.
If it is the pipe that has bends, they are designed that way to make the motor run properly so just don't mess with it would be your best option like I said earlier.

**smallengineguy** · 11-27-2012, 03:43 AM

The exhaust system is designed to give the most power for that engine. Keep it all together.

1on3off · 11-27-2012, 05:00 AM

Quote:

Originally Posted by von diesel

yeah it doesn't look too bad,except at some point in it's life previous owner hit something with the front and the pipe leaks at the joint where the springs are.
probably be able to line it all back up,but if not...

I realize it needs the back pressure ,but Would it hurt to eliminate any of the 3 bends after the muffler if need be?

My exhaust leaked in the same spot. I took it into a local muffler shop and they repressed the opening. Another words they trued up the opening by making it perfectly round again. Much cheaper than a new exhaust.

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