![]() Once the saws cooled all the way back off they would start and run. Gas can sitting in the shade looked like a basketball from air pressure built up in it. The gas tank pressurizing, as a n unscrew the cap and get a face full of gas. So oil to gas mixture comes to mind.ĪK… nope 50:1 mixture. The fuel pumps are fairly simple devise that can have issues.īut since all 3 saws quit near the same time it appears like a common issue. You can trim the ends of the fuel line or better to replace if you can. If you're saws are getting older the fuel lines can deteriorate giving you running issues. What leads you to believe that it is vapor locking ? I suspect you're oil pre mix is 50:1 are you mixing it too lean ? If you're keeping it somewhat clean of old saw dust, I like to use air blower. It's just an internal combustion engine that's smaller. It ran like a champ until my Father decided I didn't need two of them and took that one home with him. Instead of fooling around and trying to clean it, I bought a new carb off Amazon for about $13. He had mixed up his gas with ethanol gas and had let it sit over the winter. I got a second saw for free from a buddy who was moving. The shorter bar makes it a great limbing saw. I bought one new and immediately switched to a 14" bar. That is correct but it is a pretty handy saw. Quoting: BrettnyAlso a ms170 is a prety base model saw that's really not built to be ran all day I haven't pulled a chainsaw cord since I got my lithium saw. Good tip on the summer winter fuel change. Also a ms170 is a prety base model saw that's really not built to be ran all day. That could cause a whole other slew of issues. I believe the newer saws now have cat converters in them. I think the tank vent on my ms460 is a bit clogged. My leaf blower, both weed whackers, 2 other chain saws dont care. I run into vapor locking a bit with any gas if I dont top off the tank on my ms460. I learned something! Hope this helps any of you Northern habitating folks who also have winter and summer fuels in your areas! emptied the chainsaws, then mixed a new batch of fuel with regular 10% ethanol fuel. So, dumped the mix into my old Tracker tank. I had bought that 91 octane in late November for my snowmobile. ![]() ![]() Another tell tale was our gas jug even sitting in the shade looked like a basket ball. Found a post by the USFS with a warning to their saw operators about spewing gas when opening 5he tank in warm weather if winter gas is being used. to simplify, way more butane in winter gas so it vaporizes at a lower temperature. what is the difference in summer and winter gas. Of course I'm scouring the internet with the symptoms and got on one forum where a saw mechanic answered a post of someone describing my symptoms, he said, "Winter gas, nuff said." Others agreed. Well the gas was freshly mixed, 91 octane,Įthanol free with Stabil in it. same thing!įrustrated I took it to a small engine repair shop and when I picked it up he said nothing was wrong other than old gas and a little adjustment. I ordered a new carb for mine, then after a part of a day cutting dead stuff around the cabin. If you took the fuel lid off with fuel in the tank, you got a face full of gas! We kind of gave up. We were at our wit's end so after a couple of loads, each with an hour or more in there fighting saws.after they cooled some they would kind of run but die a lot. My older Echo CS330T and my wife's brand new M170 Stihl. Saws did well early then started vapor locking. We started getting wood early this spring, it had warmed up a bit and was in the 70's mid morning. Small Cabin Forum / Off-Grid Living / Chainsaw Issue. Forums - Register/Sign Up - Reply - Search - Statistics.
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