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Author Topic: Older 2 stroke equip. (Chain saw)  (Read 1561 times)

Offline TSLPE

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Older 2 stroke equip. (Chain saw)
« on: March 22, 2014, 09:12:04 AM »
Just had service done on my chain saw which in approx 29 years old. The fuel mixture according to instructions is 16 to 1. Most of the newer 2 stroke stuff today is 40 or 50 to 1. They tested and tuned my saw with a mix of 40 to 1 saying that the oils of today are far superior  than 29 years ago and a 40 to 1 mix is ok for older 2 stroke equipment. What do all you people think? Will it be ok? It won't be getting a lot of use anymore. My firewood cutting days are over. Just be using it for storm clean up and elk camp. 

Offline FC

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Re: Older 2 stroke equip. (Chain saw)
« Reply #1 on: March 22, 2014, 09:21:39 AM »
I would probably keep the oil mix rich just to keep it from over-revving, it was designed to run at 16:1, I would keep it there. I'm sure premium 2 stroke oil is better but that is also a 29 year old 2 stroke engine.
The reason there are so many Ruger upgrades is because they're necessary.

Offline Kittman

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Re: Older 2 stroke equip. (Chain saw)
« Reply #2 on: March 22, 2014, 09:26:58 AM »
It would be better to keep the mixture screws adjusted to the rich side, and then use 40:1 mix you should be just fine.  Chainsaw will only over-rev if the idle screws are set too lean, and that condition will destroy the engine rapidly.

Offline jay.sharkbait

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Re: Older 2 stroke equip. (Chain saw)
« Reply #3 on: March 22, 2014, 09:31:31 AM »
Run it at 40-1.

And try to get ethanol free fuel or drain and run  the saw dry after every use.

The saw shop is right.


Offline Mike450r

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Re: Older 2 stroke equip. (Chain saw)
« Reply #4 on: March 22, 2014, 09:49:16 AM »
40:1 is fine for the smaller engines with the better synthetic lubricants out now.   32:1 for the larger engines like motorcycles etc...

Offline mazama

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Re: Older 2 stroke equip. (Chain saw)
« Reply #5 on: March 22, 2014, 10:13:34 AM »
All of my saws are older,most mixes are designed to mix with one gallon of fuel,i stop the pumt at about 9:10-i also add a couple of squirts of stabil to every gallon,ido same for mower and i never have a problem,over time all chainsaws have to be adjusted-even elevation can effect them.

 


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