I have an Echo C-300 chainsaw that needs a 50:1 mix, a Ryobi string trimmer that wants 35:1 and a blower that wants 40:1. Rather than have three different cans going at once, I mix 40:1 for everything. They all seem to do OK on this (so far). Think it will matter in the long run? Do the specified ratios usually need to be folowed exactly?
Oil Ratio Tolerance
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seems to me that you're chainsaw would probably smoke a bit more... and have the potential to foul plugs easier... but other than that shouldn't be a problem for it. Keep an eye to make sure you're not fouling/plugging the muffler over the longer run. You're running your trimmer a with less oil than spec'd, so that's the only thing to maybe be concerned about... But, 40:1 vs 35:1 is probably not a big deal though (?). Run a decent quality TC3 rated oil to try and keep the soot down in the saw.
That's my $.02 - but bear in mind, that I won't buy you a new trimmer if you blow it up
Brent
That's my $.02 - but bear in mind, that I won't buy you a new trimmer if you blow it up
Brent
Brent, smoiking an douled plugs are caused by carbs set too rich, not oil ratios. Saws take a TCor iso egd rated oil, not a tcw3 rated one. TCW3 oil is ment for boats and has totaly differant additives packages and base oils.
Tony Snyder
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I think you will be O.K. with what you propose to do.
shows what I know! I'm OK with outboards & snowmobiles... haven't had much experience with chainsaws (that's why I've been lurkin' here lately).
Thanks for correcting me guys, but can you elaborate a bit on the dif's between TCW3 rated oil vs. oil designed for an air cooled engine?? I remember at one time trying to figure out the difference between oils but at that time it was for "snowmobile" oil vs. "outboard" oil (both TCW3).
Brent
Thanks for correcting me guys, but can you elaborate a bit on the dif's between TCW3 rated oil vs. oil designed for an air cooled engine?? I remember at one time trying to figure out the difference between oils but at that time it was for "snowmobile" oil vs. "outboard" oil (both TCW3).
Brent
Brent, TCW3 oils have additives sytems that are designed to protect a engine that operates under low heat, continous rpm conditions. Iso egd, jaso FC oils are deisnged for engines that see transitional throttle, very high temps and high loads. Air cooled oils have low ash additive packages while TCW3 oils have ashless add packages. There are also some other differances, but I wont bore you to death. BTW I wouldnt use a TCW3 oil in a sled either. SkiDoo has stopped reccomending there use and cat and Polaris all sell "powervalve" oils that are not TCW3.
