Jan 16, 2016 · - AV on the 661 is bad ass vs 660. My wrists and elbows give me problems when I ran the 660 to much. 661 no worries. - I'd say you'd get about 20% more gas mileage with the …

Dec 4, 2015 · Hi Bruce ( @Gentleman ), I bet it would be great to see a replacement coil for the 661 that allowed us to run a standard carb without having to run the M-tronic coils. European …

Dec 31, 2015 · I was looking up some parts on 661 yesterday and noticed a few things on the carb, solenoid, and coil. I couldn't find any bulletins. Anyone, know more about these new …

Feb 8, 2016 · gas mileage - 661 all the way. anti vib - 661 all the way. My wrists and elbows no longer hurt after running the saw all day (using 661). m tronic - if you have the 4701A coil and …

Jun 10, 2018 · Hi everyone. I have been doing some reading, and although used the search function here I don't ever seem to find a lot of info on the subjects I am searching (I believe its …

Apr 1, 2016 · On funkysawmans 661 I believe he had the muffler opened up quite a bit. I changed to the muffler to one that was a tad more restrictive and did the reset procedure, it took 2-3 …

Aug 15, 2018 · Check out the thread "Has the 661 been proven like the 066/660". That will give you an idea of some of the issues. If yours is the newest model with all the updates on the M …

Aug 7, 2019 · I just got off the phone with my Stihl dealer, and he mentioned to me, that Stihl was going to start offering the 661 carb version in the US. He said his rep mentioned it to him, and …

Oct 14, 2021 · Hello all, I hope this finds you well. So I have a new MS 661-C with maybe 12 to 13 hours on it. The other day it just stopped running and would not start again. Today I found the …

Dec 14, 2017 · I have a 661 that was giving me lots of issues, it spent a lot of time at the shop under warranty. Many new solenoids, wiring, carb and a complete new M-tronics system all …