sagerider
New member
Okay... riding has been going great, then hit a new problem last week. Was making several trips across a field with low snow (almost none by day's end). I know, I know... but I had to. Part of a service contract with Internet provider (has antenna's on my property, lost power so had to jump through hoops). Anyway, MM700 suddenly got a terrible, horrible bog... I mean stopped dead in its tracks, sputtered and gagged and the temp light started flashing. I shut 'er down immediately. Started checking things out (there was some water and mud in and around the tub... not sweet, I know). Felt the head... didn't feel real hot, same with the hoses. Checked the rear cooler, still had snow around it and was steaming like normal. Popped the cap, coolant level good.
Okay, checked the coils and boots felt loose on the plugs. Wiggled them around a little, pulled them off, pulled plugs. Plugs looked good... a little oily maybe. Put everything back together, fired it up (grudgingly) and headed for the shop. Half way there, did it again. Left it running this time, popped the hood and wiggled the coils... then it came back. Okay. Get it to the shop, pull plugs and put new plugs in. Now the coils snap back on. Good. Pull plugs, check compression. All good, only 1lb diff. Hmmm
So, off to the mountains. Got up over 7k feet yesterday in the Eagles, snow was very deep. Got a ton on the hood, and eventually got some steaming off the pipes. Been riding hard (deep heavy snow) for about 2 hours, with some stops, went off this little drop, slowly. Leveled out at the bottom, and cough, gag, sputter... won't go. Freaked out, shut it down. Checked everything again. All is good, except the coils are loose on the plugs again?? Hmmm.. wait a little, let everything air out. Fire it up... off we go. Then, every time I carve into deep powder, it sputters and cuts out.
Whats up? Could I have a leak in my coils and everytime I get moisture in the tub it shorts out? Looking in the book for the specs and will run diags on them tonight. If it is, is there a bandaid until I can get new ones?
Thanks
Okay, checked the coils and boots felt loose on the plugs. Wiggled them around a little, pulled them off, pulled plugs. Plugs looked good... a little oily maybe. Put everything back together, fired it up (grudgingly) and headed for the shop. Half way there, did it again. Left it running this time, popped the hood and wiggled the coils... then it came back. Okay. Get it to the shop, pull plugs and put new plugs in. Now the coils snap back on. Good. Pull plugs, check compression. All good, only 1lb diff. Hmmm
So, off to the mountains. Got up over 7k feet yesterday in the Eagles, snow was very deep. Got a ton on the hood, and eventually got some steaming off the pipes. Been riding hard (deep heavy snow) for about 2 hours, with some stops, went off this little drop, slowly. Leveled out at the bottom, and cough, gag, sputter... won't go. Freaked out, shut it down. Checked everything again. All is good, except the coils are loose on the plugs again?? Hmmm.. wait a little, let everything air out. Fire it up... off we go. Then, every time I carve into deep powder, it sputters and cuts out.
Whats up? Could I have a leak in my coils and everytime I get moisture in the tub it shorts out? Looking in the book for the specs and will run diags on them tonight. If it is, is there a bandaid until I can get new ones?
Thanks
are you showing signs of arcing at the base of the plugs? it will look like excess carbon where the plug sits on the head. use some di-electric grease in the plugs and in the caps to make a seal. or your sucking hot steaming air from under the hood. have you sealed all the pipe joints with high temp silicone as well as the big gaping hole where the silencer exits the belly pan? this makes a huge difference. also, try taping off the right side hood vent(as you looking at the sled), the one above the bumper. use the foil heat tape like the hvac guys use. this trick helped my piped mtn max by keeping the snow off that particular pipe.
sagerider
New member
snowdad4 said:
Yes, there has been some black deposits all over the plugs. I figured it was rubber off the boots. I'll try the di-electric grease right now.
I have the stock airbox with no mod, but yes I may be getting some of that hot steamy air. However, nothing different from before or last year and it never acted like this before. And yes again, all the pipe connections are siliconed.
One thing that did happen recently, had a very hard landing off a decent jump. Didn't realize it for a while, but had bounced the exhaust pipe out of the hole in the tub and it wasn't seated properly. I wiggled it back in there, but it is not, and probably never was, a picture perfect fit.
I'll try the foil heat tape thing too... I'd already been contemplating that.
Ran awesome today, no bog at all. But the snow was nasty heavy and wet. Didn't fluff up on the hood much, if at all. Had my worst stick of the year today though. Went for a little jump, but couldn't see at the last minute and let off only to slump over into a hole. Trenched, was stuck up front and in the rear, and the entire stuck glazed over like a glacier. No shovel, and snow turned harder than a rock. I was the pickup guy in the back of my family group. I was still digging with my hands and a screwdriver when they found me two hours later. Sweet... but no bog.
Thanks again Snowdad. Your like a pocket mechanic.
I also found the specs on the coils, just havn't tested them yet.