MS391 trade in or sell?

[fearofpavement]

Pecan is a stringy wood almost like elm. It doesn't noodle as well as one would like. (a lot of cross grain)
A hydraulic splitter is your friend on this type of wood.
Cut it 8" long and sell it to guys that smoke with it.

 

[Ron660]

Keep it for smaller sized trees for firewood. I ran a MS 390 for over 8 years and never had a problem with it. I bought a 660 for larger stuff. Listen to Z71Mike's comments.

 

[nickwa04]

Thanks guys! One last question. I have read about the auto tune stuff. But from what I am assuming I still need to adjust carb once muffler mod? And after reading some posts I am going to switch to 32:1 instead of 50:1 on the gas mix.

 

[Ron660]

You will need to adjust your carb after those changes. I use a tach so I know exactly were I'm at. My friends 441c, mtronics, adjusts itself. I still need a screwdriver and a tach which I don't mind. I also recommend downloading your service manual to find out your idle and high end speed rpms.

 

[z71mike]

Adjust your carb every time you use the saw. Cheap protection from lean seizure.

 

[nickwa04]

I realize that but with these two saws being new they have the "intellicarb" as stihl calls it. That is the part that confuses me I guess. I thought that adjust the fuel/air ratio. I assume I still adjust them the same as the old saws?

 

[rob066]

I realize that but with these two saws being new they have the "intellicarb" as stihl calls it. That is the part that confuses me I guess. I thought that adjust the fuel/air ratio. I assume I still adjust them the same as the old saws?

It does to a point but adjusts for a dirty air filter and thats about it. It has no wide range adjustment to compensate for mods. You must do that manually. The cm saw are controlled electronically and have a wide range of adjustment enough to compensate for mods. The cm have enough range that they will flood out even with an air leak.

 

[nickwa04]

Thanks!!! Makes sense now!

 

[z71mike]

Intellicarb is basically useless. Helps stop catastrophic failure from a plugged air filter. It means nothing when it comes to tuning. The saw is still 100% manually tuned.

 

[nickwa04]

Good to know! Now just to get the limiters removed on the adjustment screws. Assume you have to remove carb. My junk echo 306 I got free I muffler mod it and easy to tune did not have to deal with removing limiter caps. I will say though I am extremely disappointed in the filter on the ms391. I noticed fine fine pieces of dust on the plastic intake of carb.

 

[kenneth davidson]

Good to know! Now just to get the limiters removed on the adjustment screws. Assume you have to remove carb. My junk echo 306 I got free I muffler mod it and easy to tune did not have to deal with removing limiter caps. I will say though I am extremely disappointed in the filter on the ms391. I noticed fine fine pieces of dust on the plastic intake of carb.

I found some information similar to your comment about dirt getting through the air filter. You can use K&N air filter oil on the inside of the filter to help keep dirt out. I did that this weekend and it trapped the fine dust, but also sealed around the gasket.

 

[sawfun]

Sell the 391 and get a decent used 044 for the difference. Significantly more power, better built, and lighter than your 391. For what a used 391 goes for, you could probably find a nice 044. And you can run a 28" bar acceptably with it.