B
Yes I am every time I hit the throttle at low rpms I’m 200 miles in so maybe it’s still in break in? Doesn’t seem right
850 bogging
- Thread starter Jimrat
- Start date
J
So my dealer spoke with Polaris and they have advised to run them on non-ethanol mode, which would solve the issue.
I’ll go for a ride later on this week and try it out.
I’ll go for a ride later on this week and try it out.
If you over rev especially in Break In it will cause a bog. Did it with hitting WOT from a dig or ect.
J
I think most of us are on non ethanol mode and have this issue anyway.
Proride....how many hours/miles on sled so far?
AKFULL..Did you notice it also seems to come right after an engine restart?
I am going to try it again, but instead of sticking sled, starting and pinning....I'm going to let it run a bit first. I also noticed this restarting and going directly onto a climb. Seems like same behavior.
OTM
sputter
They must know about this - stutter - hesitation off idle and up to approx 4000-5000 rpm on mine too - 16 hours on it -163, 2.6 track RMK with Kurts' gear down kit - 2 sets of plugs now - gonna try hotter plugs till they sort out the fuel mapping issue - it's definitely fueling rich down low - leaves a light black streak in the snow on a hard pull from a stop !! Lol - Bikeman can - clutching right on now - maxing 8200 rpm - runs friggin great otherwise !
They must know about this - stutter - hesitation off idle and up to approx 4000-5000 rpm on mine too - 16 hours on it -163, 2.6 track RMK with Kurts' gear down kit - 2 sets of plugs now - gonna try hotter plugs till they sort out the fuel mapping issue - it's definitely fueling rich down low - leaves a light black streak in the snow on a hard pull from a stop !! Lol - Bikeman can - clutching right on now - maxing 8200 rpm - runs friggin great otherwise !
Spot on. The digital gauges at least since 2011 (rode m-series through the dragon years) don’t react fast enough to usually even show you. If you can consistently see 8400+ under load on a stab I guarantee your tapping the 8600 rev limiter, it’s pulling back, then picking back up. A lot of times it will show it get that high on the record function on the gauge but you never saw it actually displayed while riding.
And yes. You need more weight. With the stock clutching at sea level you really need the 10-74’s. They were back ordered when I got my sled, actually gave them back to the dealer when I installed my clutch kit because he couldn’t get enough from polaris.
One other thing I forgot to mention.
Bog might be also be related to engine acceleration beyond what's programmed into the ECU. So say your a flatlander running down the trail and you blow a belt under load, the ECU is going to see rev's ramp up super quick and retard timing to protect from over revving. Belt's don't always break at WOT....I've seen lots grenade at trail RPM's so it may do it before the engine ever reaches 8600 RPM. If this programming is looking at all rev situations (low rev's and high), the bog may be related to engine acceleration as well.
Maybe the new 850 is too fast revving for even Polaris......LOL
OTM
Bog might be also be related to engine acceleration beyond what's programmed into the ECU. So say your a flatlander running down the trail and you blow a belt under load, the ECU is going to see rev's ramp up super quick and retard timing to protect from over revving. Belt's don't always break at WOT....I've seen lots grenade at trail RPM's so it may do it before the engine ever reaches 8600 RPM. If this programming is looking at all rev situations (low rev's and high), the bog may be related to engine acceleration as well.
Maybe the new 850 is too fast revving for even Polaris......LOL
OTM
Lots of good points here in the bog. I agree if motor revs to fast it goes to protection mode. Had this problem on turbo. Curious if this bog was there in breakin mode for the ones it's happening to?
T
This is not the case where my bog is happening. It is at low speed no acceleration. It almost doesn't matter because I'm not doing any critical moves at that speed, but it still annoys me every time.
I also leave black streaks in the snow as mentioned above. Another new issues is a loss of about 200 rpm. It was running amazing up until last weekend and now seems sluggish and won't find that remaining rpm it used to have (yes the belt deflection is adjusted properly).
I added more weights to the clutch until it stayed at 8150 - 8200 rpm's WOT - now at 72 grams
That would be a yes for me. No big change from new to 12 engine hours (give or take). It's an acceleration bog in my case, not the down low like some people are having.
OTM
B
Mine still does it on non ethenol mode
J
Link to a video I did yesterday.
Juste to make sure we are all talking of the same
https://youtu.be/xeyJHW4PAN0
Juste to make sure we are all talking of the same
https://youtu.be/xeyJHW4PAN0
J
Ya JF, same thing. Did you try non-ethanole ? Have you spoken with your dealer ?
It needs a cleaner map....that's a quick low-cost fix, so I hope they put something out.
Also - can't say for sure - but from what I am observing and reading...it seems those with an aftermarket can are experiencing this with more frequency than those with stock exhaust. Again that's not set in stone...but it doesn't seem to improve the situation, at minimum.
Also - can't say for sure - but from what I am observing and reading...it seems those with an aftermarket can are experiencing this with more frequency than those with stock exhaust. Again that's not set in stone...but it doesn't seem to improve the situation, at minimum.
J
Yes it’s on 91 non ethanol
It’s obviously worst in ethanol mode
Talks to dealer and doesn’t know... they asked Polaris and are waiting for a reply since at lest a week now...
I really feel it’s simply a mapping problème. The problem seem to be more In the Sled’s that are at sea level. Mapping to riche for this elevation???
Some guy told me from a source that Polaris will be comings ou with an updated mapping... would love to have this news from my dealer!
My consern is that not all sled have this issu... makes me wonder why mine..?
B
New map coming out in a few weeks
I sure hope your right. Snowcheck isn't that far off and it would be nice to see some progress on this. Can't justify it with how that bottom end is.
Polaris told my buddy it's still in break-in mode. He has roughly 30hrs and close to 500 miles. The scan with the phone says he has 5hrs. They told him it only records time that the engine is over 5000 rpm. He will be getting a hard time over this for years to come. Lol. They do want him to bring it back in again to hook up to the big computer.
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