It's here!!!!............Inside the MS661

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Sorry to disappoint you guys. We were at mom's until about 1 AM. I started the Christmas thread when I got home. I ended up not going to bed until 4:45AM. I still have two customers saws to port before I get to this one. I'll be doing one this afternoon and one tomorrow. This evening we'll have a house full of company for Anna's 16th birthday. So, yes, I'm crazy busy. I'll get to it as soon as possible...promise!!!
 
I have no need for a 661 class saw, but the big breakthrough, at least in my mind ... it is the first M-Tronic saw that did not add weight or bulk, and the power did not remain the same, it increased.

Most Autotune saws are also heavier than the saws they replace.

......

No, most of them actually are lighter, despite the Autotune: 550xp, 545, 560xp, 562xp (barely), 555, 556, 2253, 2252, 2260, 2258.

Only the 576xpAT (that was the first one) is heavier.
 
Sorry to disappoint you guys. We were at mom's until about 1 AM. I started the Christmas thread when I got home. I ended up not going to bed until 4:45AM. I still have two customers saws to port before I get to this one. I'll be doing one this afternoon and one tomorrow. This evening we'll have a house full of company for Anna's 16th birthday. So, yes, I'm crazy busy. I'll get to it as soon as possible...promise!!!

Take your time, the "wolves" can wait! ;)
 
There is no way that a saw can pull fuel all the way from the tank through dry filter, lines, and carb in three pulls. This has nothing to do with MTronic.
A saw just out of the box the flagship of stihl and marks on the cylinder? its normal ? what hapend with this marks when the flagship go for work ?
 
Maybe if your tank vent is screwed. That don't explain the lean condition you are experiencing. All my 10-12 M-Tronic saws fired up flawlessly: six of them on one pull in July weather. Don't tell me there's no way. You got a saw there to be proud of, but you better look at them score marks boss.
IMG_4274-L.jpg
one picture is a thousands words my friend, 661 mtronic the flagship of the stihl. smell you a new............. recall ? just say
 
Maybe this carbon concept would WOW? Think its a couple lbs lighter than 661C-M, same power but 85cc, fuel injection, titanium in muffler and bar nuts, and has the carbon bar.

ssssssssssssssssss INJECTION and carbon fuel tank weight like 261. the 661 its another piece of ****. many friends here in europe buy it and now hit theirs heads in the wall.
 
I have no need for a 661 class saw, but the big breakthrough, at least in my mind ... it is the first M-Tronic saw that did not add weight or bulk, and the power did not remain the same, it increased.

Most Autotune saws are also heavier than the saws they replace.

I think that is why the 372 and 461 still don't have modern electronic control.

I'm hopeful that the Tech advances in the 661 will work their way through the entire Stihl lineup.
does the alloy flywheel weigh the same as the poly, and why back to alloy?
 
I smell some bullsh*t with this comparo, the 661 is stock and tuned awfully rich and the chain is likely dulled but man, this 390xp is a freakin' monster. If you can get gains like these with that Stihl you will have a wicked machine. Looking forward to seeing how it turns out.

 
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