Adirondack
ArboristSite Operative
Is there any difference between one or two piston rings? Does this mean better compression or longer life? What saws have two rings?
2-ring pistons are seen typically on what are considered to be more, "pro" saws because they offer more durability.
In the case of Stihls, their, "occasional use" saws/leafblowers/etc have 1 piston ring.
I have a 242XP a 262XP and a 7900 they all have only 1 ring these are all pro saws!
Hi!!
In competition 1 ring (higher RPM, lower weight, less friction...), but sure less duration, but in competition duration isn´t very important.
Curiosly 1 ring is cheaper(less material).
I think constructors trying to find the best of two worlds, 1 ring but nickasil or chrome cilinder for improve duration!!.
Earlier models with iron cilinders use two rings better than one.
2-ring pistons are seen typically on what are considered to be more, "pro" saws because they offer more durability.
In the case of Stihls, their, "occasional use" saws/leafblowers/etc have 1 piston ring.
my 371xp only has one ring.
the acceloration on that saw is increadable. it just jumps to peak RPM instantly. i really notice it after i have been using my 372xpw for a while then switch to the 371xp
It's not much good to give a rule of thumb, since there are so many variables (like Troll said), but:what are the disadvantages of two rings, apart from cost?
my 371xp only has one ring.
the acceloration on that saw is increadable. it just jumps to peak RPM instantly. i really notice it after i have been using my 372xpw for a while then switch to the 371xp
2-ring pistons are seen typically on what are considered to be more, "pro" saws because they offer more durability.
In the case of Stihls, their, "occasional use" saws/leafblowers/etc have 1 piston ring.
Funny how I cut more timber in a day with my two-ring 372 than guys cutting right next to me with their single-ring 371s...
Thats just Talent! Nothing to do with the rings lol
With the cost of rings im glad my262XP only has 1 £11!!!!
Flattery will get you everywhere...you just earned yourself a free piston ring for a 262xp my friend...
Enter your email address to join: