Stihl MS660 or 066

[250R]

I have a chance to buy 1of these saws. Both in VG condition. I need some help with this. I plan on using a 36" bar. Are both saws basically the same in performance? Will I notice a difference?

 

[Tobystihl]

Hi yes basically the same saw!

 

[Hand Splitter]

Get both! Try them out. Keep the one you like best. Or like them both and keep them both!

 

[Mad Professor]

660 somewhat emasculated by the EPA regulations. Early 066 had differe nt style crank/flywheel

 

[PV Hiker]

Flippy caps / Non flippy caps.

 

[Bob Hedgecutter]

Would you rather have a 250RB or a 250RG?

 

[huskihl]

Flippy caps / Non flippy caps.

They’re both non-flippy.

An early 066 would have more power than a 660

 

[Justsaws]

The early models felt lighter, smaller, a bit more angry at nature in general. They also might have a good bit more use on them and certain parts are getting hard to find. The later models could have less use on them, feel a bit chunky and some were kind of weak power-wise, perhaps miffed instead of angry, still a 90cc saw just more polite. Both will do a 36” bar, most folks would not notice the difference between a 066 and a 660 powerwise.

Late model parts are a plenty in both OEM and aftermarket. The AM parts are everywhere on 660s,I see very few used 660s that do not have AM parts installed these days.

 

[InfiniteJest]

A flat top 066 is pretty hard to beat. Just plan on numb fingers and arms.

 

[PV Hiker]

They’re both non-flippy.

An early 066 would have more power than a 660

@huskihl .. My bad.... 661 went flippy. Thanks and embarrassed to post.

 

[Tom82]

I know you said 066 vs 660 but, if it's a late model 066 it's the same saw as a 660.

The early flat top 066 is pre regulations, is physically smaller and makes the same power or more.

All of the 066/660's are the same same bore, stroke, and CC.

 

[drf255]

The early 066 had no Decomp, better timing and tighter cases. Also smaller by a tiny amount.

Depending on how old you are, the decomp valve is a plus on the 660’s and later 066. Less power because of port layout, but you can’t run a saw you can’t start.