M7 randomly died

[AKHark]

Was climbing this hill today and when I turned around at the top my m7 immediatly died as i pointed it downhill. It had been running fine all day until this. It took about 15 pulls to get it stared again and then ran fine the 2 miles back to the truck. I know this could be a million different things, but it dying as soon as i turned it around seems odd.

Any ideas?

 

[Mn_Mtn_Cat]

Could it be water on the fuel pump pickups in tank?

 

[AKHark]

Thats the only thing I could think of, would putting Heet in there stop that?

 

[jasn179]

i would bet it is your stuck throttle device had ice in it happens to all sleds

 

[Arctic Thunder]

Pull your pipe and inspect the piston skirts

Pull your pipe and look at the skirts on your pistons.

My guess is you may have squeaked it.

Thunder

 

[AKHark]

Alright thanks i'll check that out. Does that mean that its not getting enough oil?

 

[mtn_extreme]

Most sleds burn down right after a long hard pull on the turnout. You have everything hot hot and all the sudden you stop giving it any fuel to cool it down and squeeeeeeekkkk. I always blip the throttle slightly on turnout. Good luck, hope it is just a fuel pump issue or something simple.

 

[jasn179]

the key is it ran 2 miles back to truck i would bet that stuck throttle switch on the handlebar had ice in it had it happen again to a m1000 last weakend my m7s done it as has a summit and also a rmk

 

[Mjunkie]

If you have a lot of miles on the sled and the piston isn't squeaked, pull the fuel pump/regulator out of the tank. They have a fine mesh screen around them and it could be plugged. Mine did something pretty much the same last year, and I didn't find out until I put a fuel pressure gauge on it, and when it died on me next time, I noticed that the fuel pressure was way low. Cleaned the screens, put them back in and haven't had a problem since.

 

[Arctic Thunder]

the key is it ran 2 miles back to truck i would bet that stuck throttle switch on the handlebar had ice in it had it happen again to a m1000 last weakend my m7s done it as has a summit and also a rmk

You could be right. But my M1000 did this exact same thing about 5 times before it burned it bad enough to keep it from running. I put a good 500 miles on it after the first squeak.

Let us know what you find.

Thunder

 

[qshear]

i have an 06 m7 and when i start out every weekend for a day ride about half a mile in my sled starts to die wheather im on a trail or in the powder. I have to stop and play with the throttle before it will start going again.

 

[AKHark]

Problem just got alot worse

So I checked everything out and couldnt find anything wrong so just decided it might be a fluke thing. I went out riding 2 days later and it ran fine allday.

Well I went out riding today and was riding for 15 minutes and we decided to go to the backside of Turngain, about half way up the climb the machine dies again. I was probably going 3/4 throttle for about 15 secs when it died.

I rode down the hill backwards for a couple hundred feet then got the sled stopped. Tried to start it and it ran for about 1 sec then died, tried again and gave it a little bit of throttle and it just wanted to take right off, it wouldnt idle, if I got off the throttle it would die. Changed plugs and it all looked good.

I got towed part of the way out then decided I would try and start it again. The sled started but wanted to die if you got off the throttle and it would just take off with the littlest amount of throttle and would stick for about 1 sec when you let off. Rode it back to the lot like that and was probably the scariest couple miles of ridden with a sled that the throttle would stick and die if you let off.

Sled is going to the shop tomorow. Any ideas??

 

[theultrarider]

Yep, sounds like it is what sevreal of the guys have said here. There is an electrical switch in your thumb throttle that senses when your throttle cable is stuck.. Sometimes the little buttons that sense this will freeze and stick. When this happens it will shut your motor off...unless you sqeeze the throttle and put pressure on the throttle cable. So, if it is running fine while squeezing the throttle and it only dies when you back totally off the throttle, that is mostly your problem. Also when this is happening, you will often get a backfire when you get back on the throttle after letting off and getting back on it again.

 

[m8magicandmystery]

barometric sensor tube for cpu kinked,,??..any codes flashing..??

 

[AKHark]

Nope nothing flashed at all

 

[AKHark]

Yep, sounds like it is what sevreal of the guys have said here. There is an electrical switch in your thumb throttle that senses when your throttle cable is stuck.. Sometimes the little buttons that sense this will freeze and stick. When this happens it will shut your motor off...unless you sqeeze the throttle and put pressure on the throttle cable. So, if it is running fine while squeezing the throttle and it only dies when you back totally off the throttle, that is mostly your problem. Also when this is happening, you will often get a backfire when you get back on the throttle after letting off and getting back on it again.

Thanks. What can I do to stop this from happening again, climbing up Turnagain isnt a cool place to have this happen, im sure you know that.

 

[theultrarider]

Start by getting it somewhere warm and getting it thawed out AND DRY. Then see if it goes away. It will usually take a day or two to really get it dried out good. Alittle of that lock de-icer spray can help too. Do you have a tether cord on your sled? Alot of guys will disconnect those switches because like you said, they can cause a bad wreck at the wrong time and place. I would disconnect it without a tether though. The tether will kill the sled if you do have a throttle stick and choose to bail, or are tossed from it.

 

[AKHark]

Nope no tether. Its drying out in my garage now ima start it up in a couple hours

 

[m8magicandmystery]

is there not a bypass plug in the tool kit to install that will tell ya if the stuck cable symptoms the problem..??

 

[AKHark]

All right so I just took it up and down the street and it ran fine and sounded good. So im gonna have to say the throttle got stuck while I was going wide open up the hill.