New guy from slovenia with ms500i problem

[alaznik1990]

Ok hope this helps

 

[ericm979]

Sorry I meant the exhaust side of the inside of the cylinder. Like the first pic of the cylinder but the other side. Also pics of the top of the piston and one of the underside of the crown (if you can get one, it is a hard pic to take) would be useful.

The pistons that I have seen seize from lack of oil have had much more scoring on the exhaust skirt than yours does so I think the cause was not lack of oil or oil failure. It looks like the side of the piston with what appears to be pitting above the upper ring gap area is the intake side? I'm saying that because it has score marks that roughly match the scoring on the intake side of the cylinder, and that side has less dark carbon than other side. The exhaust side of the piston always runs hotter.

 

[alaznik1990]

Sorry I meant the exhaust side of the inside of the cylinder. Like the first pic of the cylinder but the other side. Also pics of the top of the piston and one of the underside of the crown (if you can get one, it is a hard pic to take) would be useful.

The pistons that I have seen seize from lack of oil have had much more scoring on the exhaust skirt than yours does so I think the cause was not lack of oil or oil failure. It looks like the side of the piston with what appears to be pitting above the upper ring gap area is the intake side? I'm saying that because it has score marks that roughly match the scoring on the intake side of the cylinder, and that side has less dark carbon than other side. The exhaust side of the piston always runs hotter.

No problem as long as I can help
Hope these pics are better

 

[alaznik1990]

New parts arrived

 

[alaznik1990]

Pressure and vacuum test ok

 

[alaznik1990]

Saw is finally running hope it stays that way

 

[Seachaser]

Good job. Maybe I missed it, but how old was the saw and about how many hours on it?

 

[alaznik1990]

Good job. Maybe I missed it, but how old was the saw and about how many hours on it?

Ohhhh now that's a hard one can't say for sure,but the saw is 2 years old

 

[Piotr Pakuła]

We say that in the forest, the saw will survive the warranty period well, and if it is good, it will last 2-3 years

 

[alaznik1990]

We say that in the forest, the saw will survive the warranty period well, and if it is good, it will last 2-3 years

Yes I agree but with bad maintenance It won't last even a year

 

[Tomos770]

What oil ratio are you going to use now?

 

[Piotr Pakuła]

in the forest, they pay for the amount / with us, not much / so the sawmill tries to cut as much as possible / not everyone cares about the service / and it is as it is, the saw fails well if not the operator

 

[alaznik1990]

What oil ratio are you going to use now?

Hahaha 1:40

 

[Tomos770]

Did you investigate what have killed your saw? An air leak? Usually worn out bearing on clutch side gets enough play.....to eat away a lip on the seal (semmering)....

 

[stihltech]

Look for something comming apat in the crank and bearings. I am guessing a cage.

 

[alaznik1990]

What oil ratio are you going to use now?

Hahaha 1:40

Did you investigate what have killed your saw? An air leak? Usually worn out bearing on clutch side gets enough play.....to eat away a lip on the seal (semmering)....

A combination of a bad bearing and overheating was my guess and my local Stihl dealer confirmed that.

 

[Piotr Pakuła]

bearings from a small amount of oil also fail faster as well as too much chain tension

 

[alaznik1990]

bearings from a small amount of oil also fail faster as well as too much chain tension

Noted
And thank you all for every bit of information you have shared it helps a lot

 

[Tomos770]

bearings from a small amount of oil also fail faster as well as too much chain tension

Especially with those X-torq..... 2Mix designs.....where there is less fuel/oil flow trough the bottom end...

Thats why its better to mix 40:1 or 32:1....