Stihl MS660 or 066
- Thread starter 250R
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Hi yes basically the same saw!
Hand Splitter
ArboristSite Operative
Get both! Try them out. Keep the one you like best. Or like them both and keep them both!
660 somewhat emasculated by the EPA regulations. Early 066 had differe nt style crank/flywheel
Flippy caps / Non flippy caps. 
Would you rather have a 250RB or a 250RG?
They’re both non-flippy.Flippy caps / Non flippy caps.
An early 066 would have more power than a 660
Justsaws
Addicted to ArboristSite
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.
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
ArboristSite Operative
A flat top 066 is pretty hard to beat. Just plan on numb fingers and arms.
Tom82
ArboristSite Operative
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.
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
BAD CAD
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.
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.
