2012 etec 800 won't start

[saski]

Took sled for a ride, ran fine and normal, unloaded from truck and parked in carport. Its for sale, Dude came to look at it, started first pull as per normal, idled for 2-3 minutes, shut down. Dude comes back to buy it in minus 20c when I wasn't here, wife says he pulled and pulled, wouldn't start. Had my buddy drop by minus 25c now, same thing. I come home, minus 10, No dice, just some backfires, couple mild run for a second or fire once type of thing. Try full throttle it fired once or twice but didn't help. Its been in the heated garage for 4 hrs now at room temp 20c positive and not a single fire. I did pull plugs and compression test it and reinstalled same plugs as normal. Hasn't fired since I did that. Compression test shows about 110-115 on PTO and 115-120 on Mag. Which seems a bit out but not a definite conclusive motor failure especially at idle? Seems odd that it at least wouldn't fire up on the mag side and run a bit crummy. Unless I lost a skirt on one. If anyone has had a similar event or knows much about the etec plug deal let me know. Plugs looked a bit moist and it was backfiring so I would think there is enough fuel, spark it strong from both sides, seems like enough compression to run at least especially when it started first pull, idled for 3min and then wouldn't start the next day? Pissing me off.

Thanks if you know what my next step is, aside from tearing it down for a rebuild.

 

[Team Lazy]

Just a shot in the dark but it sounds like water in the fuel/carbs maybe? Try some gas additive to get the water out. Have you tried putting some NEW gas directly into the cylinder via the spark plug holes? If it runs and dies in a minute then at least you know it's probably an air/fuel thing, not the motor. If it's water in the fuel it would make sense. It froze and now you have ice in there, which is going to be water again even if it runs. It's gotta go!

I always recommend heating the plugs with a blowtorch before reinstalling as well. I've brought a few dead motors back to life that way.

Good luck, let us know.

 

[jet101ski]

I have seen the same symptom twice this year on two of my buddies 800 etec summits. Both of them had a stator go out... Showed spark on the trail, but I guess the stator wasn't putting out enough power to give spark and run the fuel pump too...