What oil is best? and what ratio?

[bwalker]

A piston should have carbon on it if the motor is tuned properly. This can't be disputed.

 

[bwalker]

And my MS260 ran on motul 800 has carbon on the piston.

 

[junkman]

Piston should have carbon with a little wash by the transfer ports i thought ?

I did try to peek inside the milling 660 the other night ,got the scope in there saw a lot of the carbon is flaking off and bare piston color on the exhaust side of piston where the carbon flaked off ,i was making real hard passes ,on a 2 foot thick fir log that had been down a year ,thought something was wrong with my chain it was so hard to cut ,not sure if it was the hard cut or the stock muffler keeping too much heat in ,maybe both ,my batteries died in the scope machine so got no images ,the cut i was making was like ripping 2 4x12 timbers down the long way at once that were real dry ,

 

[jmssaws]

I'm not using oil anymore,just a shot

Piston should have carbon with a little wash by the transfer ports i thought ?

I did try to peek inside the milling 660 the other night ,got the scope in there saw a lot of the carbon is flaking off and bare piston color on the exhaust side of piston where the carbon flaked off ,i was making real hard passes ,on a 2 foot thick fir log that had been down a year ,thought something was wrong with my chain it was so hard to cut ,not sure if it was the hard cut or the stock muffler keeping too much heat in ,maybe both ,my batteries died in the scope machine so got no images ,the cut i was making was like ripping 2 4x12 timbers down the long way at once that were real dry ,

Carbon flakes off all the time and should.
If not things would get tight over time.

 

[junkman]

I'm not using oil anymore,just a shot

Carbon flakes off all the time and should.
If not things would get tight over time.

Half the piston was bare aluminum on exhaust side ,intake side was still carboned ,i will get some images when get some batteries ,never had a saw do that much ,just little chips here and there .

 

[jmssaws]

Half the piston was bare aluminum on exhaust side ,intake side was still carboned ,i will get some images when get some batteries ,never had a saw do that much ,just little chips here and there .

Stock muffler got it hotter than normal and cooked it off I magine

 

[junkman]

Stock muffler got it hotter than normal and cooked it off I magine

Question ,is the saw going to melt down ,or is this normal ?I need to get images i know ,will try this weekend .

 

[mdavlee]

Piston should have carbon with a little wash by the transfer ports i thought ?

I did try to peek inside the milling 660 the other night ,got the scope in there saw a lot of the carbon is flaking off and bare piston color on the exhaust side of piston where the carbon flaked off ,i was making real hard passes ,on a 2 foot thick fir log that had been down a year ,thought something was wrong with my chain it was so hard to cut ,not sure if it was the hard cut or the stock muffler keeping too much heat in ,maybe both ,my batteries died in the scope machine so got no images ,the cut i was making was like ripping 2 4x12 timbers down the long way at once that were real dry ,

That sounds like a normal milling cut in hardwoods. I've seen some of them do that bare spot near the exhaust port after being worked real hard.

 

[jakethesnake]

I feel like I'd have to swap the muffler to an opened up one and wear some muffs... Heats not really your friend in my opinion I could be wrong but on those long milling cuts I'd want the heat out ASAP Not saying shell go nuclear on you but the extra heat probably isn't gonna do your machine any good. Nor is listening to a loud ass saw Maybe try the muffs?

 

[jakethesnake]

For the record I've never milled anything nor do I have a saw capable of the job. My opinion comes from the fact that a long milling cut keeps you at wide open for such a long time obviously you'll see more heat than say falling a large tree So since chainsaws aren't necessarily designed to mill???? I don't think??? Maybe a good open muffler could help the saw shed down enough heat for it to never reach those borderline temperatures. I could be full of *s-word that's just how my brain feels today

 

[jakethesnake]

Now how bout the cheap black bottle of husqy oil Any good? Trash? Price was right I'm burning lucas right now ... I heard it was good stuff. I also read the last few pages where it sucks eggs. I'll say this it's unlikely I buy more but I have a gallon or so of the cheap husqy oil anyone have an opinion on it ? Not the silver one but the black?

 

[jmssaws]

Question ,is the saw going to melt down ,or is this normal ?I need to get images i know ,will try this weekend .

Got a pic of how the saw lays on the mill

 

[junkman]

Got a pic of how the saw lays on the mill

In the am i can

 

[jmssaws]

In the am i can

Got a box here from you

 

[Nitehawk55]

I think doing a muffler mod and resetting the carb if able is one of the best improvements of any , simple and a better/cooler running saw .

 

[bwalker]

Piston should have carbon with a little wash by the transfer ports i thought ?

I did try to peek inside the milling 660 the other night ,got the scope in there saw a lot of the carbon is flaking off and bare piston color on the exhaust side of piston where the carbon flaked off ,i was making real hard passes ,on a 2 foot thick fir log that had been down a year ,thought something was wrong with my chain it was so hard to cut ,not sure if it was the hard cut or the stock muffler keeping too much heat in ,maybe both ,my batteries died in the scope machine so got no images ,the cut i was making was like ripping 2 4x12 timbers down the long way at once that were real dry ,

They absolutely should.

 

[bwalker]

I think doing a muffler mod and resetting the carb if able is one of the best improvements of any , simple and a better/cooler running saw .

I agree. The only downside is the noise, which after decades of shooting and racing two strokes becomes annoying.

 

[Chainsaw Jim]

Won't carbon build up on the piston crown prohibit a good quench which is more important in an air cooled two stroke chainsaw motor?
A cleaner burn will produce less carbon, so using higher quality oil and richening it up just to see carbon build up seems like the wrong thing to do.

 

[jmssaws]

Won't carbon build up on the piston crown prohibit a good quench which is more important in an air cooled two stroke chainsaw motor?
A cleaner burn will produce less carbon, so using higher quality oil and richening it up just to see carbon build up seems like the wrong thing to do.

I can assure you that a saw I tune isn't rich and there will be carbon.

Wash patern will eventually fade away.

 

[mdavlee]

I feel like I'd have to swap the muffler to an opened up one and wear some muffs... Heats not really your friend in my opinion I could be wrong but on those long milling cuts I'd want the heat out ASAP Not saying shell go nuclear on you but the extra heat probably isn't gonna do your machine any good. Nor is listening to a loud ass saw Maybe try the muffs?

I want to rig up a cylinder temperature gauge just to see. I know at the end of a cut the cylinder is near 500°. That's about 150° hotter than redbull has gotten any time. They won't score there if they've got a good tune. I've run out mid cut when I didn't realize it would use 2 tanks per cut. Not a good feeling when it screams lean for a second and dies.