Stihl MS 661 Adjustable Carb Version

[Vintage Engine Repairs]

Hi,

I have seen some posts from 2020 that Stihl was bringing out an adjustable carb version of the 661, anyone have one? I know some have modified the m-tronic version back to carb, but that’s not what I’m referring to here.


My local dealer can’t find any info on them here in Australia.

Thanks all.

 

[JPCalifornia]

The traditional carb 661’s a hard to find, but if you’re in the market for a 661, it’s definitely the way to go. I personally think the 661cm (m-tronic) runs on the lean side, and I like to run these bigger saws on the rich side, especially when using the saw for any type of milling. The performance is awesome BTW.

 

[snobdds]

My dealer always has pro saws in non m tronic versions for sale. Sthil makes them for the fire guys and forest service. He has a 661 non mtronic on the shelf now.

 

[JPCalifornia]

There’s nothing better than a traditional, old school saw shop like you appear to have over in Big Wonderful Wyoming!

 

[benjo75]

I have a new in box non m tronic 661 and 261 sitting in the shop now for spares. When I found out I could get the non m tronic I started buying what I could.

 

[huskihl]

Believe it’s called a 661 Magnum. Might not be available in Oz.

I believe all Stihls but the 400 and 500 are now available in standard carb models due to a shortage in mtron harnesses

 

[JPCalifornia]

What about the MS170 Magnum ?

 

[isawben]

What about the MS170 Magnum ?

I’ve got one of those, it sits right next to my MS170i.

 

[Dennisthemenace]

Oldish post but did anyone see one in Australia? I'd buy one to compare with my C-M. Especially if the cylinder and timing were the same. I'm not convinced the 661 cm runs lean but my 462 certainly does

 

[JPCalifornia]

Go buy one so you can be convinced

 

[HansFranz]

So ... how does a traditionally-carbed 661 compare to a 660? Anyone ran them side-by-side?

According to Stihl, the 660 is 7.1 hp and the 661 is 7.2 hp but I suspect muff modding the 660 and fattening it up would more than make up for that 1.4% difference in power...add a MAGNUM decal and it's all over!

 

[JPCalifornia]

Absolutely, adding that Magnum decal definitely puts it over the top!

 

[Dennisthemenace]

Go buy one so you can be convinced

I have one, early '17 Australia, white solenoid, 40/1 Amsoil, 98 Octane, muffler opened up, Maxflow, moderately used, plug is wetter/darker than photo shows

 

[Vintage Engine Repairs]

Any luck on the 661 carb version Dennis. They could do away with any limiter too while they’re at it.

 

[stihlaficionado]

Mucho smoother than the 660 I sold

 

[terryrichardson10]

My 661cr with the muffler I made

 

[Vintage Engine Repairs]

Still no sign of them in Australia