What oil is best? and what ratio?

[bwalker]

Nutball, yep,. Both you and I have modified 590's and 620's. They're weird saws.

Even that freakishly long stroke changes how much rpms they want. They're just not screamers. Roughly the same piston diameter as an ms 261, with the stroke of 37.6 mm. That's .4 mm shy of the stroke of most 81 cc saws like the husq 181.

Since bwalker is clueless about almost any echo chainsaw I'll spell it out:

The piston velocity due that freakishly long stroke, 400 rpms was a significant enough difference from being too lean to running right. The stock upper transfers couldn't fuel the saw at those rpms.

BUT, the 620p will run slightly rich at 13500 rpms. Identical bore and stroke, different exhaust and upper transfer numbers. It's kind of like a ported cs 590.

I ran them both today, bucking about 2.5 cord of birch.

Relax...I was just saying you didn't hurt your saw from running it a bit lean.
The more I hear about Echos the less I want to own one if indeed they are that finicky.

 

[Sloa]

placing a dog from a 028 onto a 038 super and it has this black plate, doesn’t seem like it is needed.can someone please explain how dog gets mounted.

 

[pbillyi69]

its either one or the other not both

 

[Sloa]

its either one or the other not both

Thanks that makes sense

 

[mainer_in_ak]

Relax...I was just saying you didn't hurt your saw from running it a bit lean.
The more I hear about Echos the less I want to own one if indeed they are that finicky.

Oh my, bwalker wow! Yep, thanks for stating the obvious that you can't handle echo saws.

A 1/4" turn on a high jet soooooo challenging, and finicky.

 

[Mastermind]

Be nice gents.

 

[mrxlh]

Man, I swear it’s almost like I’ve seen the end of this movie before, hmm…

 

[bwalker]

Oh my, bwalker wow! Yep, thanks for stating the obvious that you can't handle echo saws.

A 1/4" turn on a high jet soooooo challenging, and finicky.

You're the one who said finicky and weird. I trust you...

 

[bwalker]

Man, I swear it’s almost like I’ve seen the end of this movie before, hmm…

Its like the movie Whats Eating Gilbert Grape with Arnie/DeCaprio screaming ECHO!

 

[bwalker]

Ran saber at 32:1 in the fleet of saws for about 18 months. Would never run saber in the oil injected snowmobiles because I was afraid it would strip out the plastic oil injection gears. It's too thick in the hard below zero temps. It won't pour from a bottle at 30 below zero.

The saber residual in the crankcase of 90 cc and 100+ cc chainsaws was so gummy in below zero temps, the saws were hard to start.

Have always ran the lucas 2 cycle in the snowmobiles because it pours at 30-40 below.

To simplify things, I have been running the lucas in everything: string trimmer, ice auger, brush cutter, snowmobile, and all the chainsaws. Switched in February 2024. No stabilizer in the lucas so have been adding 1 oz stabil marine per 5 gal jug.

Dunno if it's built up carbon or shortened lifespan of saws. One saw in particular: a cs 590 has been run only on lucas since new. I'll pull apart the saw in March post up pics of the cylinder at the 1 year mark of lucas.

30 below zero last February:

Why would you use premix oils in an injection system?

 

[mainer_in_ak]

 

[bwalker]

Speaking about Saber.

 

[pbillyi69]

oil threads sure rile folks up

 

[Wilhelm]

Her: Got lube?

Him: "spits on it" Yeah!

 

[Wilhelm]

oil threads sure rile folks up

Human nature!

Complicate simple things & make an elephant out of a mosquito.

 

[Mastermind]

oil threads sure rile folks up

Sadly.

 

[damifino]

Seemed very peaceful till about a week ago. Wonder what happened?

 

[Partner]

But only nervous ones

 

[Wilhelm]

Seemed very peaceful till about a week ago. Wonder what happened?

I was running out of Makita oil!

But all is good, I got the last they had - You can all calm down now.

 

[full chizel]

Her: Got lube?

Him: "spits on it" Yeah!

Hawk Tuah