390XP Performance at 10,000 Feet Elevation

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I guess I could have put the muffler together and tried it. I was just welding on an outlet and screen on the front. I may do that on the next 661 muffler.
Make sure you use a bronze muffler it'll help diffuse the argon better I know it sounds odd but works great on the hydraulic pipes.

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Make sure you use a bronze muffler it'll help diffuse the argon better I know it sounds odd but works great on the hydraulic pipes.

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I don't think I have any of the good purge rigs from work. A piece of steel wool works well over the end of the hose.
 
I don't think I have any of the good purge rigs from work. A piece of steel wool works well over the end of the hose.
It might cost a few extra dollars but it's well worth it in the end I purge as much as I can even carbon steel it just welds that much better.

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I get it completely but it'll help on burn through and help with how it welds.

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Most deflectors are being welded on the outside, so it you don't burn through you don't have to worry about shielding the back side.
 
It might cost a few extra dollars but it's well worth it in the end I purge as much as I can even carbon steel it just welds that much better.

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With my baby bottle of argon it wouldn't last too awful long. I can build 3 084 mufflers and it's out
 
Living near to the Pyrenees in France we often get wok in the 2/2500 metre altitude the saws used run a muffler mod & are tuned at the altitude they are to be used at generally they just seem to lose a few revs not sure how many as tuning is by ear the fallers tend to work in short bursts.
 
I work with the USDA FS for most of my resources. Any modification to the muffler could put you in jail. It has been a while since any USDA personnel looked at my equipment. When they did every thing I had was was in good shape ant the mufflers looked great. Here in California any thing to do with a fire is serious. I have been threatened numerous times for being in my normal work area when fire conditions were high. If some one notices a muffler mod even if it is not a mod that would not endanger the landscape it still is a NO NO.

I live and work at 6,000 feet and higher. 8,500 to 9,000 feet are as high as often work. With this in mind all saws need a little timing boost. At least 5 degrees to start with because it makes quite a bit of gain. Thanks
 
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