Hello All - First time poster, long time reader.
I recently acquired a 2015 MXZ 600 H.O. ETEC TNT which was in great condition has around 3900 miles on it.
On my first real outing on a lake with a combo of hard pack and fresh snow riding, the sled started exhibiting this weird bogging-down / seems like it was running on one cylinder after about 6 -10 miles (don’t know for sure). It was intermittent, but got worse the more I rode. I didn’t want to put many miles on it with that happening, so before trailering, I parked it on the lake to let it cool down and reproach the problem.
After letting it sit for about 2 hours, I came back out and it started right up without issue. It ran clean for a bit then starting having the same problem. I limped it back to our trailer and put it away and went running for this forum.
After reading similar posts on similar year ETEC motors, I changed out the coils, and the wires. Put dielectric grease on everything and put the plug wire clips back on. Plugs seemed good, properly indexed to be facing the injector the right way, maybe a bit on the rich side, but nothing terrible (previous owner said he had the plugs changed last season). I also replaced the aftermarket belt with a new OEM belt, and put some dielectric grease on the DESS contacts, as someone posted that that was a culprit for them. I ran it for like 12 mins in my garage (no room to test stuff out in my area) and it ran great.
Well, I took it out riding last night and it ran like a champ for about 30 trail miles. We stopped multiple times and shut it down and restarted. I thought I was cured. UNTIL - we were nearly back at the trailer and it started happening again. The one-cylinder bog down. Put ‘er back on the trailer and tried to stay positive, but come to this place for some help on where to turn.
Thanks for the help.