Posted by Bret4207 on September 25, 2012 at 04:10:07 from (64.19.90.196):
In Reply to: Chain saw gas mixture posted by Sammy in Kansas on September 24, 2012 at 20:09:49:
It really depends on the model and when they were made. Jonies for the last 25 years or so have been 50-1 engines. A Mac might need something more like 30-1 or richer depending on how old it is, or it might be a 40 or 50-1 machine.
FWIW- I have saws dating from the early 60's up. I tend to run about 40-1 in all of them with no problems. But you want good 2 cycle oil, not outboard oil and certainly not motor oil! The biggest reason the old engines used 16-1 or 20-1 was because the lubes were so poor back in the day. With a good 2 cycle oil, assuming the saw isn't worn out or has been abused, I think something in the 35 or 40-1 range will work for most saws. There will be exceptions that simply require a richer mix due to specific wear, design or conditions. IF the saw will run good at 50-1 then that's what I'd go with. Too much mix oil is almost as bad as not enough.
This post was edited by Bret4207 at 04:11:57 09/25/12.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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