Pistons to cylinder

[StihlEchoingHusky]

I have no clue if this has been mentioned before or maybe it has.
Would you say that there is a piston to cylinder ratio? By that I mean if your saw is ran with no leaks,high quality oil and good gasoline and your cylinder doesn't become out of round. that you could get (I don't random number) 3 pistons to 1 cylinder before you'd want to look into replacing the cylinder. I know that nikasil a ALOT stronger than aluminum, so I figure there might be some kind of ratio. If that makes any sense.

 

[bwalker]

I have no clue if this has been mentioned before or maybe it has.
Would you say that there is a piston to cylinder ratio? By that I mean if your saw is ran with no leaks,high quality oil and good gasoline and your cylinder doesn't become out of round. that you could get (I don't random number) 3 pistons to 1 cylinder before you'd want to look into replacing the cylinder. I know that nikasil a ALOT stronger than aluminum, so I figure there might be some kind of ratio. If that makes any sense.

Bikes routinely get multiple pistons per cylinder, but with them the limiting factor is the dirt they ingest. Chainsaws don't have to deal with that and they are in a much lower state of tune.

 

[David Young]

if a saw is well taken care of the cylinder will show little wear after many hours of use. However I think people try to use a piston too long. I would almost never re ring a piston. when you are at that point the machine marks are probably long gone on the piston. while the saw may run, I think the worn piston may contribute to more maladies than commonly recognized. Spend 40 bucks for a new piston.

But sometimes I do understand the repair goal is just to get the saw to run for limited use. The saw itself may not be worth the cost of the piston. There are two distinct scenarios in my mind. This second scenario maybe they are a homeowner that will only need a saw for property maintenance or to remove a tree across a driveway. Even a scored piston may be cleaned up and the ring freed to get by.

By the time the second piston is worn out. Most likely the rest of the saw is well worn too.