What oil is best? and what ratio?

[Ron660]

Yes , a 660 ,Randy ported it for milling ,it milled fine stock also ,running square .404 chain also

Ever check your tune milling? Just curious if you tune richer when milling compared to cutting firewood?

 

[Ron660]

Yes , a 660 ,Randy ported it for milling ,it milled fine stock also ,running square .404 chain also

Square full skip?

 

[junkman]

Ever check your tune milling? Just curious if you tune richer when milling compared to cutting firewood?

Same tune as cutting .maybe slightly richer 13k or so on 660 ,in the pass it is pretty smooth between 8-9000 rmps

Square full skip?

i run full comp and full skip ,if w want a little nicer finish will use full comp ,full skip leaves a decent finish also ,just not as nice as full comp ,full skip is a little faster ripping though ,clears the chips better .

 

[Keith Gandy]

Stihl 201t Stihl Ultra @ 50to1. Bearings r shot and slide on/off by hand and crank was moving side to side in crankcase. Ring lands were full of carbon

 

[Moparmyway]

My 660 likes 24:1 in the summer cutting stumps with the bar oiler turned up.

Yuppers, thats what muh stumpers eat year round when they b stumpin !!

24:1 ain't just for the summer.........

Stihl 201t Stihl Ultra @ 50to1. Bearings r shot and slide on/off by hand and crank was moving side to side in crankcase. Ring lands were full of carbon

Yuck !!

 

[Stihl working Hard]

Stihl 201t Stihl Ultra @ 50to1. Bearings r shot and slide on/off by hand and crank was moving side to side in crankcase. Ring lands were full of carbon View attachment 78516 View attachment 78517 View attachment 78518

That's terrible Keith the only oil I buy from Stihl is biodegradable bar oil it's Mobil1 Racing 2T in the fuel for me @ 40:1 zip carbon

 

[Keith Gandy]

That's terrible Keith the only oil I buy from Stihl is biodegradable bar oil it's Mobil1 Racing 2T in the fuel for me @ 40:1 zip carbon

Im not sure whats goin on with this saw unless its tuned too lean. Generally the Stihl Ultra thats in equipment that I work on looks pretty clean in the ring lands and some doesnt. These rings were getting tight

 

[Stihl working Hard]

Im not sure whats goin on with this saw unless its tuned too lean. Generally the Stihl Ultra thats in equipment that I work on looks pretty clean in the ring lands and some doesnt. These rings were getting tightView attachment 78595

Tried it once Keith but it burns my eyes something bad ,I know a treelopper using ultra and have rings sticking as well

 

[RI Chevy]

How does one tell if a ring is sticking without taking saw apart?

 

[Stihl working Hard]

How does one tell if a ring is sticking without taking saw apart?

I personally have seen premature blow by on the exhaust side

 

[Keith Gandy]

Thats about the only way I know of too. I had a 550xp that did just that with Klotz Super Techniplate in a real short time. Blowby and sure enough when I tore it down the ring was already hard to move in the land from the buildup

 

[Ron660]

Im not sure whats goin on with this saw unless its tuned too lean. Generally the Stihl Ultra thats in equipment that I work on looks pretty clean in the ring lands and some doesnt. These rings were getting tightView attachment 78595

Maybe they'll switch to a better oil after that diagnosis.

 

[rogue60]

Now fellers yall know if I was runnin any oil other than RA she woulda cried WOLF!!!!

I don't know about that I've run saws for a few days at a time not a few minutes with big air leaks ripped intake boots leaking crank seals on Cheap Castrol mineral oil at 25:1 with no ill effects wear or failure to the power head but then they are Stihls lol...the work needs doing the saw still runs so ya just keep at it...

 

[rogue60]

How does one tell if a ring is sticking without taking saw apart?

Heat gun and stopwatch! Ya slippin Chevy lol

 

[RI Chevy]

Lol. I still don't understand. Lol
What am I missing???

Sent from my SM-G930V using Tapatalk

 

[Keith Gandy]

I don't know about that I've run saws for a few days at a time not a few minutes with big air leaks ripped intake boots leaking crank seals on Cheap Castrol mineral oil at 25:1 with no ill effects wear or failure to the power head but then they are Stihls lol...the work needs doing the saw still runs so ya just keep at it...

Not common practice for me brother! Id pick up another saw if I had one until I could fix the problem instead of running a known problem if I was aware of it? Ive seen saws drop cylinder/piston in a few minutes with air leaks

 

[rogue60]

Lol. I still don't understand. Lol
What am I missing???

Sent from my SM-G930V using Tapatalk

Stuffed if I know with out pulling the saw down I just made that chit up about the heat gun and stopwatch...lol

 

[rogue60]

Not common practice for me brother! Id pick up another saw if I had one until I could fix the problem instead of running a known problem if I was aware of it? Ive seen saws drop cylinder/piston in a few minutes with air leaks

Not a problem for me to keep running a saw with known air leak thanks to running the same oil and 25:1 mix for over 20 years I have never had a failure due to an air leak I have confidence in the oil to keep running the saw, I've done lots of testing this oil but I just call it work...

 

[Stihl working Hard]

Stuffed if I know with out pulling the saw down I just made that chit up about the heat gun and stopwatch...lol

LMFAO

 

[Keith Gandy]

Not a problem for me to keep running a saw with known air leak thanks to running the same oil and 25:1 mix for over 20 years I have never had a failure due to an air leak I have confidence in the oil to keep running the saw, I've done lots of testing this oil but I just call it work...

Sounds good brother