MS200 muffler assembly sealant? I suspect this is one for MM.

Besides the 257, I picked up a nice MS200 over the weekend. The spark arrestor was partially clogged and, without realizing what I was getting myself into, I removed the whole muffler and opened it up with the idea of cleaning it out thoroughly. As I began cleaning up the oily carbon deposits (I suspect the guy I got it from uses something other than a 50:1 mix) I realized that the muffler had been assembled with some sort of liquid sealant (now hard and brittle) between the two aluminum halves. I will have to replace that sealant when I'm done. Does anyone know what it might be?

 

Probably some sort of Dirko or ThreeBond high-temp goo. I had a Stuhl in here that used goo on the case joint, have no idea if it was factory or not.

 

I dunno what they used in the factory, but I would think red permatex would work OK. I'm not sure what temp it is rated for though. Worth a look.

My buddy has some goop that he uses to seal turbos on the hot rod diesel engines he builds where the pyro's go off the charts. I think it is just generic high temp exhaust sealant.

 

Whatever it was, it was hardened up like brittle plastic, not at all soft or rubbery. I got the saw from the original owner and I don't think it's likely he ever took it apart so I'm pretty sure it's a factory sealant.

 

Nope, it's two castings screwed together. I guess it's only sold as a unit, though. The sealant must be there to prevent the plastic parts around the muffler (like the gas tank!) from getting hit with hot exhaust leakage. The proximity of the gas tank would explain why they'd only sell it as a sealed unit.

 

Permatex Copper is a high temp sealant that would work for your application. Very good stuff.
Is your saw a 200t, or 200 (rear handle)?
If the latter, I would love to have it

 

Thanks, I actually have some copper permatex on hand. I was also thinking of picking up a tube of the stuff permatex makes specifically for automotive exhaust systems. Thoughts?

It's a rear-handle, practically like new. I got it from a small-town tree service guy who said he never seemed to use it because he was always reaching for the top-handles instead. He had an obvious case of CAD -- one guy, no employees,, and on the floor of the garage a 660, 460, 372, 550, a couple of 200Ts and more, all in perfect shape. Nice guy, too.

 

I would use the copper, it is a high temp sealant. On a serious note, send me a pm when you are ready to part ways with that saw. I don't have to have it, but it would make a killer carving saw

 

Mine wasn't even all that expensive, but it's still hard to justify having when I see what they go for on eBay. Even more so, since I only cut a couple of cords a year at most. I keep hoping a big tree will fall across my street during a storm and give me an excuse to break out the hardware.

 

Because mild cruelty is fun, this is the original bar.

 

Here's the rest of it.

 

I aim to please.

 

Jon1270, what a beautiful little saw.

 

Yeah, I don't what to make if it. It's like an alien creature amongst all my other saws that have, y'know, actually been used.

 

Well it is small enough that you could put it on the mantle and your family could enjoy it too!

 

My wife's pretty tolerant, but that would be over the line. Besides, I am never comfortable keeping tools that I don't use at least once in a while. I feel guilty for keeping them out of the hands of someone who needs them more than I do.