Here's the story: I bought a 2007 AC F6 SnoPro a few years back at the end of the season; it started fine, as the previous owner was using it semi-regularly. The sled only had like 1,300km or something.
I rode it for about 700km that weekend, then I stored it for the winter in my buddy's trailer. Come the fall, I take it out in hopes of giving it a once-over before it's time to ride. No start, after a good 60 pulls between me and my buddy. Ether/quickstart would get it going, but that's it, so we ascertained it was a fuel delivery/computer issue. Took off the dash, exhaust, and took off the fuel rail which sprayed some gas. Injectors looked fine, so we re-installed the injectors, and it starts after 2 pulls. Note: this season we pulled the power valves to inspect/clean them, as we weren't sure what the previous owner's maintenance was like, but they were in perfect condition.
Next year, same deal. Not until I removed the fuel rail, and re-installed it, will it then start after 2 pulls. No power valve work, as I only rode the sled maybe 600km the previous year.
This year, same crap; 75 pulls and it won't start on it's own. Remove the dash, another 15 pulls: no start. Remove the exhaust, another 15 pulls: no start. Disconnect the rail, and re-install it (spraying some gas). 2 pulls, runs perfect. Again no power valve cleaning, as I rode the sled maybe 50km last year.
So, I am thinking there's no way it's supposed to be like this "from the factory", so I am trying to figure out what's up, and make it so my fall checkup doesn't involve this seemingly pointless exercise. My current working theory is that, since the fuel rail isn't recirculating like it would be in a car, whatever fuel goes down that fuel line HAS to come out the injectors. Either:
A) The fuel in the line/rail will not burn after sitting for 7 months; when I disconnect the rail, I am basically draining the fuel line/rail of "old gas".
B) There is air getting into the fuel rail somehow, and the injectors are not opening until there is fuel in them, or they're burping air, but never enough for fuel to get there.
I do not use fuel stabilizer anymore; I figure it's not very long between when I stop using it, and when I give it a tune up, so it's not worth it. I did, however, put stabilizer the first year, and it didn't help. I fill the fuel tank before I store it at the end of the season, and I grease all the grease points, but that's it. I also use Arctic Cat APV.
Is there something I should be doing, that I am not doing? Is there a part that is worn-out somewhere that is causing this issue? It's annoying, and seems like there's no way this is the experience everyone has with this sled.
Why doesn't my 2007 F6 start until I disassemble it?
