Stihl MS661 MTronic vs 066 Red Light

Finalizing the 661 project and a head to head with a classic muscle saw.

[@jimssawsnstuff8903]

Those 066's are great old saws! I logged with one for years 😎👍

[@Zach_R]

Love the 066 red light edition just pick myself up one last month going through the whole saw right now can’t wait to put her in some wood!!! Great video keep up the great work!

[@richardflagg3084]

Thank you! I know you'll love it. Well worth the effort.

[@cajun3197]

That 066 is bad to the bone for a stock saw. On the 661 I’m not sure if it’s was the piston swap or the intake being smaller but it’s seems a lot more snappy than other 661s I’ve seen run. Great idea making this video!

[@richardflagg3084]

Thanks Cuz!

[@cajun3197]

@@richardflagg3084 😎🤙🏽

[@mrxlh]

Really nice looking Solo’s RIchard!!!

[@backwoods4x4jason13]

I just picked up a 066 red light , with a 25 inch bar I haven't even cut into anything yet and it sounds mean

[@ronkuzyk3836]

I would like to see a better comparison between the saws. Maybe by someone who does not cut into the other logs in the deck and finishes the cut. Maybe put them on a mill.

[@quentindavis6]

That 066 was running 👍

[@gannangrace1246]

Again another awesome video! You had me at red light I have 3 of them tougher than a $2 steak old school muscle right there.

[@richardflagg3084]

I've got one more that needs restoration. All the important pieces are there and in good shape. Cosmetically she's and ugly girl.

[@gannangrace1246]

Awesome hopefully we get to see her come back to life would make a great video/videos.

[@Mike_Mike_0]

Nice video Rich😆 Them good old saws 💪💪💪💪 Happy and safe cutting. 🪓🪓🪓

[@d.m_7779]

the 066 is gold and strong

[@richardfuerst5286]

I'd take that 066 every day of the week!

[@richardflagg3084]

More proud to own it now then when I got it 15 years ago. They are truly hard to find with the original parts that made them so special (coil, carb and cylinder). The cylinder is a piece of artwork. KS really did the nicest cylinders pre-EPA.

[@ryanstewart1521]

That 066 was tuned perfect

[@mrxlh]

Man that 066 cuts eh…

[@ricksanchez7459]

That 066 may not be quite as good in the cut, but it runs better everywhere else.

[@aaronneher4860]

I have an all original 064. Serial says 1987. Original muffler finally gave up so I’m picking an aftermarket dual port and going with a max flow air filter as well. The single outlet on the OE muffler is only slightly bigger than the outlet on my 036. Bet it’ll wake it up nicely.

[@aaronpowell4885]

Man that 066 is just ol'er school cool😎 the 661 seems pretty happy too👍🏻 but the cost of that cylinder😱

[@richardflagg3084]

I know rite!!!

[@mrxlh]

Oil rabbit hole… Only thing I would say about the visual oil film tests, I’d add petroleum dye as some oil dyes are much darker than others. If you redo the Dominator test with some dye added it will change the results.

[@richardflagg3084]

Yes, I'll be doing more oil tests with this as the test mule. Dunno where to procure petroleum dye tho

[@mrxlh]

They have just about every color under the sun. I’m using purple, and it don’t take much to make the mix dark dark, like 2 drops off of a small screwdriver.

[@kylecromp319]

Is it a red switch 92 power head? Ive read alot about that but heres the deal. I have a 1986 all original with a red switch and i have a 1992 red eye all original with a red switch and a 92 066 red eye with a black one a lil earlier in the year. They say osha. But that doesnt make sense now to me. So what im getting at is whats the deal with some being red some not?

[@mmg6282]

I’m not a Stihl guy but that red light is cool as ……. Looks like she cuts pretty good too….nice ole saw.

[@chevy7134]

Finally some old skool muscle for the soul.💪

[@bryanmarks4070]

Would you recommend running that piston in my 661. Will it affect the reliability? I mostly run my 661 with a 36” bar falling big timber.

[@richardflagg3084]

I'll do a video on that specifically after I get a few tanks through it. The short answer is yes tho

[@bryanmarks4070]

@@richardflagg3084 thank you. My 661 is mostly stock under the jug. I just cleaned up the ports and made them smooth/matched the exhaust to the muffler. I thru a timing wheel on it and it was pretty dam good stock. I’m still thinking of getting it machined and ported by Kevin from opm. I have a max flow air filter and a bark box with an additional port and widened the stock port and took out the baffle. Also a Timing advance. It pulls a 36” with authority. Just wondering if that piston would give it a little bump in power. Keep up the good work!!

[@adrianstefan23]

👍👍👍👍

[@shawnrice7179]

the older 066 was stronger

[@warrendrew2427]

I would like to buy a 661 but my dad won’t let me because he doesn’t like supporting companies that are wholly owned by one rich family. He also won’t let me shop at Aldi for the same reason.