850 No Start- Out of Break In- Ran Great

tbpatten33 · Dec 11, 2018

Had this same issue with mine, headed for Canada and it wouldn't start, drove 450 miles with it in the back of the truck, unloaded it started 2nd pull....ran great all weekend. Had .3 hrs on it when it did this plugs were fine. Only thing I had done to sled was install cat tether which by the way is not currently working.

polarisperformance · Dec 11, 2018

I had the same issue last year with my 2016 sks, take me 2 days to start it again. It was just flooded . Then after, It never happen again

SRXSRULE · Dec 11, 2018

This has been happening since 2016. Sometimes these sleds flood on start-up. If you dont catch it after a couple pulls and hold it wide open throttle, the problem compounds quickly.

If your sled wont start, and you remove the plugs and they are wet, check for spark. If it has spark, its flooded!

cascadesnowjunky · Dec 11, 2018

SRXSRULE said:
This has been happening since 2016. Sometimes these sleds flood on start-up. If you dont catch it after a couple pulls and hold it wide open throttle, the problem compounds quickly.

If your sled wont start, and you remove the plugs and they are wet, check for spark. If it has spark, its flooded!

Thank you, someone with a little common sense. Lol

dragona1 · Dec 11, 2018

When you start these things up and don't warm them up to operating temps ie backing them off of a trailer and shut them off or unloading them and coasting them into the shop really compounds the problem. I think they are so pig rich in break in mode that causes this.

jimh · Dec 11, 2018

I had the same issue, rode for 2 hours just fine, went to unload it the next day and it started for a second, died and then nothing.

Took it to the dealer, the diag plug wasn’t seated correctly. They reseated it and then had to get all of the fuel out of the engine.

Btw, if you unplug the diag plug, that disconnects the fuel pump. Then you arent pumping more fuel into the sled every time you pull on it...

dragona1 · Dec 12, 2018

Where is the diag plug if you don't mind me asking?

sledneck322 · Dec 12, 2018

As some others have said, sometimes you have to hold her completely wide open and pull. I have had to do it on my 2019 as well as all my others over the years.

cvcustoms · Dec 12, 2018

dragona1 said:
Where is the diag plug if you don't mind me asking?

Grabbed this from the other starting issue thread on here.

Sent from my iPhone using Tapatalk

tmberro · Dec 12, 2018

jimh said:
I had the same issue, rode for 2 hours just fine, went to unload it the next day and it started for a second, died and then nothing.

Took it to the dealer, the diag plug wasn’t seated correctly. They reseated it and then had to get all of the fuel out of the engine.

Btw, if you unplug the diag plug, that disconnects the fuel pump. Then you arent pumping more fuel into the sled every time you pull on it...

Can you clarify this?

Your diagnostic plug was disconnected - so they connected it and had to remove fuel from the engine.

Your next line says that when the diagnostic plug is unplugged it disconnects the fuel pump so you don't keep pumping more fuel into the sled.

So if yours was unplugged, where did all the fuel come from?

jimh · Dec 12, 2018

tmberro said:
Can you clarify this?

Your diagnostic plug was disconnected - so they connected it and had to remove fuel from the engine.

Your next line says that when the diagnostic plug is unplugged it disconnects the fuel pump so you don't keep pumping more fuel into the sled.

So if yours was unplugged, where did all the fuel come from?

it wasn’t seated correctly, so it was intermittent. they unplugged it, cleared the fuel and then plugged it back in. Check the diag plug and make sure its got a good connection and no bent pins.

SEVS11 · Dec 12, 2018

Mine won’t start either brand new 2 km. Went to take it out for a rip today and no go. New plugs, help wide open cranked a 1000 tines and nothing I’m soooo disappointed

AndrettiDog · Dec 12, 2018

Before everyone flips out about the 850's, I would say that my 800 did this at least five times last year. Every time, holding the throttle at 100% and pulling SEVERAL times did the trick. Temperature variances seemed to play into the issue.

nw-sickboy · Dec 12, 2018

kidwoo said:
You may just have a shlt ton of gas in the case. So every time you go to pull it just drenches the plugs.

I had something similar happen to a cat a while ago. I had to do a hot plug start, hood off, flaps open, fuel line disconnected. I eventually got it to fire by heating up a plug with a torch (like glowing red hot), getting it in as quick as you can and then starting. It vaporizes the fuel so it doesn't put out the spark.

In my case it ran for like 10 minutes without the fuel line even attached.

Just a thought. Your drenched plugs make it sound like a similar issue. Mine was from overheating it on the way back to the truck the day before and so the thing must have been just dumping fuel in to cool it down. Next day, no starting and wet plugs no matter what I tried. I was burning off so much gas in the cylinders with a lighter it was getting scary. Mine would do the same with fresh plugs: fire for a second and then just repeat the cycle. I just had to get the gas out of there, one way or another.

This **** is showing up all over snowest and the 850 group on facebook. Break in has been a nightmare on these 850's for WAY to many owners. Between shipping issues/delays in getting snowchecks, WAY to rich during break in causing fouled plugs etc Polaris has really **** the bed on this one.

RMK-King · Dec 12, 2018

I have around 10hrs and 125 miles on mine so far without any issues. Polaris is working on the hot start problem some of the sleds are having. I find it kind of odd that only some sleds do it since they should all have the same mapping.

Devilmanak · Dec 12, 2018

I would agree, but it seems that Doo is now doing the same thing, how hard is it to make a recoil starter work? Or deliver sleds before Xmas?

revrider07 · Dec 12, 2018

What about electric start units are they having problems?

snowmobiler · Dec 13, 2018

wonder how many no starts forgot to pull up the kill switch.

SEVS11 · Dec 13, 2018

snowmobiler said:
wonder how many no starts forgot to pull up the kill switch.

you can count me out......I dropped mine off last night and the tech seems to think being that the plugs are soaked and both plugs are firing that possibly the throttle bodies are not opening allowing oxygen to start the fire?

He's suggesting this because once the plugs where dried up and we held her wide open it fired up after only two pulls. So, if this happens to you try holding the throttle open if she don't start after the second or third pull.

I had a 18 G4 previous to this and yes it had its concerns but all you needed to do is pull that cord a FT max one time and she fired up every time. Not feeling warm and fuzzy about this motor just yet. The one thing I am noticing is how rich this motor seems to be on break in compare to the G4. Time will tell.......

snowmobiler · Dec 13, 2018

sounds like its to rich.might need to hold the throttle open on the first pull untill after break in or poo reflashes computor

850 No Start- Out of Break In- Ran Great

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