Stihl MS260 rattle

[Stubby]

Don't let it idle for a tank or two , worst thing you can do . Glazed rings . Work it as it is supposed to be worked from the off . Flat out .

[NorfolknGood]

What I have always done with my RC aircraft engines is run a tank through them without putting the engine under full load i.e. flying the thing or in a chainsaws case pulling high torque cutting wood. I let the engine warm up to working temp and keep the revs altering throughout the whole rev range.

 

I have heard of some people running the 1st tank using mineral oil as it speeds up bedding in but prefer to run slightly higher fully synth content for the first 2 tanks with mixtures set correctly rather than slightly rich as some people do. A rich engine is not burning all the fuel which will wash the lubrication for any moving parts.

 

That's my way with any small engines anyway right or wrong

[ward.S]

Have you checked the needle bearing is not worn causing play in the clutch cover?

 

That's my guess

 

 

Sent using Arbtalk Mobile App

[NorfolknGood]

That's my guess

 

 

Sent using Arbtalk Mobile App

 

New needle bearing arrived today and I fitted it. No discernible difference in sound but much less movement in clutch outer. Perhaps I'm being a bit fussy about sound, it cuts very well

[ward.S]

If it cuts well then I don't see a problem

 

 

Sent using Arbtalk Mobile App

[NorfolknGood]

Some how It cut ok with the piston worn and hitting the top of the pot and 1 ring seized so I don't think cutting ok is necessarily a sign of good health with the saw.