[swampdonkeyvt]

Thats cool bob. hopefully polaris will do the same with my broken frame. im assuming your 6 month warranty is over with?

 

[polariswrr]

My 2013 scrambler also has this same problem the dealer is rebuilding the motor with an aftermarket crank where the gear is casted on the crank. And polaris is warranting the whole thing. Only 150 miles on mine thank god I bought the extended warranty

 

[Fly]

Anybody know if this has happened to any 850 Sportsmans ?

 

[aknawful]

Anybody know if this has happened to any 850 Sportsmans ?

I was thinking the same thing. Is this a Scrambler only problem? Does the Sportsman have the same gear/cam setup? I've never heard of this problem before.

 

[BlkPrl1000xp]

Exact same motors far as I know.

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[swampdonkeyvt]

http://www.polarisatvforums.com/forums/polaris-xp/38347-2012-850-xp-engine-problems.html

 

[Thavandy]

It happened to my sportsman last summer

 

[hatzie]

So Polaris is going with water ingestion as the cause?
I just don't see it...

From orbit via Android.

 

[Fly]

Thanks Swamp. At least there doesn't appear to be many.

 

[Rangerbob316]

UPDATE: hot off the press. Polaris has sent a BRAND NEW REDESIGNED crank to my dealer. It arrives Tuesday. Hmmmm, wonder if it will be keyed? Have to wait and find out. Photos on their way as soon as I get them.

 

[hatzie]

Glad they stepped up. Hopefully not just press-fit... I'm interested to see.
Durn rubberneckers...

From orbit via Android.

 

[rickb]

mine also new 13 850 first ride timing gear slipped 3 teeth back to dealer totally rebuilt the new crank is different timing gear is not pressedon like original it is all part of crank one piece .good luck mine was warranty.valves also hit crank not good on these websights so spread th word

 

[Rangerbob316]

look what showed up at the dealer today... the new cranck
It's now one piece. The gear will no longer slip!


IMG_20140227_101957 by rangerbob316, on Flickr

 

[hatzie]

That'll fix the immediate problem. When you use up a timing chain you'll need a crankshaft now.
Maybe that's not an issue tho.
How long do timing chains last on these engines?

From orbit via Android.

 

[JetSnake]

I can't see how water would have done this either. But I wonder if the 2014's have the same issue, or did they get the updated crank?

 

[snipe523]

My buddy picked up a brand new leftover Scrambler 850. 12 miles/3 days into owning it the same thing happened to his motor. It's now sitting in the shop waiting on parts to rebuild it.

 

[Ultra]

Just rebuilt my 09 last weekend with new case and crank. Got it back installed pretty much today. Waiting for a new map sensor and 1 bolt to come in on Tuesday then will hope it fires right up. Sucks to have an 09 with blown engine and a 13 with rough idle both 850's.

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[Rangerbob316]

putting it all back together

IMG_20140303_145307 by rangerbob316, on Flickr

 

[Gcsupraman]

My cam gear turned with 70 miles on the quad. Ruined the entire motor. Polaris told me they were going to rebuild the motor, I fought them, and got a brand new motor installed. I'm not happy with the quality of these machines!

is this a common problem?

Apparently because all the sudden mine lost power and is running really rough. Hard to start, stumbles and even the exhaust tone is different.

Same symptoms as "newtoford" had - I was there when his motor failed and pulled him out of the woods.

Awesome - I'm out of warranty

 

[Gcsupraman]

UPDATE: hot off the press. Polaris has sent a BRAND NEW REDESIGNED crank to my dealer. It arrives Tuesday. Hmmmm, wonder if it will be keyed? Have to wait and find out. Photos on their way as soon as I get them.

Bob,

Did you ever find out what the difference was?

Mines going in tomorrow.....


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