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Ethanol in your Axys

i wouldnt put a gas tank inside the trailer

Why? Yes snowmobiler, I'll even listen to grandmas suggestions :face-icon-small-win

How about rigging up a cap with a vent hose that comes out and down the side of the tank through the floor where it's protected by a frame member and has a one way cap on it?
 
why would you think it can't tolerate eth 91?

I didn't mean to imply that it couldn't tolerate it. The conversation was about how ethanol fuel can be harmful to a motor. Most of the time it does tolerate it. I use ethanol because of the issues finding non-ethanol fuel easily. But it is a fact that ethanol binds water. You tell me if you think puddles (even small) are going to cause problems in a performance motor. Not to mention that you are 10-15% less gasoline per gallon with ethanol fuel. I was just trying to have the discussion, but some people took it as gospel.
 
Ethanol 91

I have used 91 ethanol for years in my Polaris machines. Used it all last winter for my 2017 and 2016 Axys and had no trouble. I even store it in a 500 gallon farm tank at my cabin. BUT, this year I am going to try using StarTron Enzyme Fuel Treatment. I have also used Heet randomly in the past and had good success with Sta-Bil Marine fuel additive that you can get at any Walmart. The marine fuel additive is designed to keep gas and ethanol from separating and keeping water out. All that said, I have never had any fuel related problems. I just mess around with additives because forums like this make me worry! My machines are all stock.
 
I've been running ethanol fuels since ethanol was mandated. I've probably got 25,000 to 30,000 miles on sleds running ethanol and have never had an ethanol related problem. I have experimented with straight 91 octane gas when available and have never seen a performance gain that was noticeable running 91 non-eth versus 91 eth. I may be one of the few retards that has run his sled in non-eth mode with eth. in the tank. That combination actually makes for a noticeable performance improvement at 8,000 to 11,000', and have never had an issue or failure running in that non-recommended setting. Some high volume high performance oriented dealers actually recommend running the Polaris Axys with an aftermarket single pipe on ethanol in the premium setting without a fuel controller and pretty much guarantee you won't have any lean burndowns or any other issues at elevation. It appears they are now mapping so rich that even retards can't burn one down, I guess they call that making a product "Consumer Safe".
 
We have a tank in the trailer. Its 2'x4'x6" maybe? Its horizontal up by the nose. Fill it and the sleds up at the station before going up the hill. Works great. Empty by the end of the trip. No special venting or filters. Five sleds in a trailer with vented tanks no matter what you do. Grease your hinges up good I guess!

I've used eth also but I don't put on a ton of miles either. Alcohol absorbs water, can that be removed by a common filter or is said filter just removing the bulk condensation at the bottom of the tank?
 
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