prepping for new rings

[Greg Carberry]

Lol this went from replacing my rings to race bikes, hydraulic cylinders and then underwear!! Makes for some interesting reading though

 

[paul hill]

Definately makes interesting reading. I'm sure Pioneer will always remember how to install rings. build a bike and wash his underwear now.

 

[Fish]

wash?

 

[Dennis]

Fish, i dont believe there was ever any doubt about your skids. LOL...

I personally hone every used cylinder I work on. The rings seem to seat fine. Granted I do ring and piston work to each saw as well. I use a 3 finger hone, with oil, on them. Never failed me yet.

 

[Fish]

If after removal of the piston paste there is damage to the
cylinder, I replace the cylinder. Honing removes material,
which is just that , removing material. I do not believe that
honing will give any benefit in the long, or short run.
Seating is kind of a myth, which is clouded by trying to use a
cylinder that should be replaced, mixed in with oil control issues
from 4 cycles. If the cylinder is in that bad of condition, "scuffing"
or trying to use a cylinder that is out of round from wear, is a
waste of time. Since rings on this type of equipment does not
rotate, an out of round cylinder has little hope of "righting" itself
from "scuffing" or "honing", unless a considerable amount of
material is removed. I am always siding on the practical side,
as always, and if the cylinder paste is removed and a new
piston or rings installed, it is more like a new saw, and honing
would be working against what I was trying to accomplish,
as honing would remove material.
If there was any grooves after removing the pasted on material,
I would replace the cylinder, light scratches too.

 

[bwalker]

Seating is kind of a myth, which is clouded by trying to use a

Thats not true Fish. Two stroke rings nead to seat just like a four cycles. Some Kart racers even hand lap ther rings to speed up the process.

 

[Jacob J.]

Hi Folks-

Just wanted to interject a couple of points. Stihltech and all other Stihl technicians I have talked say the same thing- use a glazebreaker, be it a ball hone on your electric drill, or by hand with 120 grit emery cloth and cutting oil. Some Stihl and Husky mechanics do their ball-honing in the solvent tank. The solvent both lubricates and washes grit away. McCulloch, in the 1960's, recommended treating all of their cylinders ( either steel sleeve or plated ) by hand with emery cloth and cutting oil. This gave the best finish.

 

[Fish]

Why I am a Stihl tech! I got a pretty certificate, a hat, a
screwdriver, flashlight and calender to prove it.
I remove the pasted on material, that's it, and get good results

I also find out what caused the problem to start with.

I have never done any exhaustive studies to back up my
observations, as I am too busy just trying to earn a living.
That is just my opinion, so it is likely incorrect. If you all
hone, scuff,sand whatever, and it works for you, then
great, I am just the type that doesn't dwell on minutiae in
general, let alone compose lengthy posts on these details.
However, the discussion here is good and healthy, it is a
shame the group of us cannot ever all get together in the
same pub just once, it would indeed be interesting, maybe
violent, but fun nonetheless.
Oh yeah, was that Synthetic cutting oil?

 

[dozerdan]

Fish
The next time that you hone one try a mixture of .99 bar lube and llama urine,I have heard it will produce an excellent finish,use only in a well ventilated area.
Later
Dan

 

[Fish]

Its not that easy, Llamas have poor aim.