rings are burned and there is only enough compression to run the engine without load.
they all vary i have a Stihl weed eater that runs 50:1 and i have others that run 32:1 and i have one that runs 16:1 it just depends on the maufacture
3oz per 1gal =40:1 and ive ran mine that way for many years and works great! 50:1 mix with premium gas. period. Only run leaner if you have a modified saw. (if you dont know it its modified, than it probably isnt). so always run 50:1!
I would run a mix of 32:1 with 89 octane fuel.
General rule of thumb is pressure check fuel hose from tank to carburetor if you can do that. There should be no leaks. Also check tank vent. Next would be the carb, then after that make sure the engine is sealed and has no air leaks. If engine has air leaks it will run bad regardless of position. You didn't say what model the saw is. Check your Stihl dealer. Some carbs have come DOWN in price substantially for newer saws.
People look for different things in a chainsaw. There are favs in multiple categories of chainsaws. But, all around Stihl is thought to offer the best chainsaws, for homeowners. And, they offer a variety of gas/electric chainsaws. Makita is very promising in giving Stihl a run for their money, though. Their Makita 64cc 20-Inch Bar 4.7 HP Gas Powered Chain Saw is recommended time and time again.
Hi _ I have an 041 AV which I love. The guy I bought it off ran it on about 1:40 with the Stihl 2 stroke oil. He says 1:50 like the weedeaters was too lean. I came across the original factory specs which list it as 1:20 but I think that is when oils weren't as good as today. I tend to go anywhere between 1:30-1:40 depending on my mood. If summer heat I run more oil than in winter. Hope that helps.
Yes. It is what I run. Just mix two of the synthetic silver bottles designed for one gallon to give you the proper 25:1 ratio for one gallon of gas. It is great oil..
No, the perfect fuel/air ratio is 14.6 to 1. A ratio of 13 to 1 is a safe ratio for most non turbo gas engines. Turbo engines can run a 12 to 1 ratio. Chrysler's lean burn system of the 70's and 80's used a ratio of around 18 to 1 and it was horrible. No gasoline engine can run at 30 to 1.
not 100% sure but almost all new saw says 50 to 1.but i never run them that lean even if they saw its fine.i mix my stihl 35 to 1.if it doesnt fowl plug i run em heavy,i have a old 1980 saw that has cut 300 cords of wood and never had any work at all except replaced fuel line and filter.
Replace the head gasket with a thicker one, this would lower the compression ratio.
Depends on the saw... On a Stihl chainsaw there is a four position switch. Top position is OFF, second position is RUN/IDLE, third position is HALF CHOKE and the last position is FULL CHOKE. Hold the throttle in with your finger and move the switch down with your thumb. DO NOT try to move the switch down into choke WITHOUT holding in the throttle. On a Husqvarna chainsaw there is normally a switch that you pull out towards you. However, there have been models made that you have to push a switch downwards.