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#3063001 - 03/08/12 11:26 AM Tundra 550f
Tradbow1 Online   content
trapper

Registered: 12/15/11
Loc: AK
Just blew up 275 miles. Walking home grrrrr

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#3063026 - 03/08/12 11:37 AM Re: Tundra 550f [Re: Tradbow1]
Spek Jones Offline
"FATHER"

Registered: 01/10/09
Loc: Homer, Alaska
Ouch!! You burn a piston or what?


Edited by Spek Jones (03/08/12 11:39 AM)

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#3063036 - 03/08/12 11:44 AM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
That is the only knock on the 550fans, is they tend to burn up. I have 550 fans in my polaris and skidoo suv. I do not run them hard for a long period of time. Babying them is the word and it seems to have worked on 3 of them. The 4th burned up 3 times before they got it fixed right and has been great ever since.

Sucks to hear. Hope you still have a warranty.

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#3063044 - 03/08/12 11:49 AM Re: Tundra 550f [Re: Tradbow1]
Kusko Offline
"Mr. Mayor"

Registered: 12/23/06
Loc: Bethel, AK
Man, that sucks. Both of mine have blown up, but after the first rebuilds, so far so good. I have 10k on one past the rebuild and 8 k on the other past the rebuild.

NW is right, baby them.

Tradbow, I hope aren't posting this message AS you are walking.
_________________________
"There are three things I have learned never to discuss with people: religion, politics and the Great Pumpkin." Linus Van Pelt

www.alaskafinandfur.com

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#3063065 - 03/08/12 12:01 PM Re: Tundra 550f [Re: Tradbow1]
Tradbow1 Online   content
trapper

Registered: 12/15/11
Loc: AK
yup still got the warrenty and extended, sled is 4 weeks old.

she's seized up, just hitched a ride home, trying to figure out a way to recover it...not sure if its blown or just seized at this point. Either way its DITW!

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#3063067 - 03/08/12 12:02 PM Re: Tundra 550f [Re: Tradbow1]
Tradbow1 Online   content
trapper

Registered: 12/15/11
Loc: AK
I just walked in the door...ps iphones dont like the cold haha. Home safe, figuring out how to recover it. Living alone and owning one sled, not a good combination.

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#3063078 - 03/08/12 12:05 PM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
Hopefully you'll get your sled back! Surely sucks that it happened. Glad you made it back safe and sound.

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#3063282 - 03/08/12 01:55 PM Re: Tundra 550f [Re: Tradbow1]
drasselt Offline
trapper

Registered: 05/17/10
Loc: Alaska
So Northway and Kusko, what would be considered babying them?

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#3063288 - 03/08/12 01:59 PM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
I do my best to not run them at high rpm's for very long. I don't speed across lakes, I don't take them mountain climbing, etc. I think the main thing is to not run them wide open up rivers, across lakes, etc. I have mine leaned out also, so take care not to run at high speeds when it is -20, etc.

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#3063456 - 03/08/12 03:08 PM Re: Tundra 550f [Re: Tradbow1]
drasselt Offline
trapper

Registered: 05/17/10
Loc: Alaska
Interesting NW, thanks. Sounds like they get too hot. I wonder if adding ventilation in the cowling would help?
It will be interesting to hear how hard tradbow was running this one when it went down.

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#3063467 - 03/08/12 03:13 PM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
Not sure what the issues are. I burnt up the 550 polaris as it created some sort of vacuum with the oiler and stopped it. It then got rebuilt with nyqusil cylinders and burnt up again. Then the guy rebuilt with and basically made the engine an 07 and did something else to it and haven't had an issue. I have an 03 550 that I duct tape the vents closed, especially when breaking trail as it was notorious for icing up the carbs with the loose snow. It has been a great machine and engine.

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#3063541 - 03/08/12 04:05 PM Re: Tundra 550f [Re: Tradbow1]
drasselt Offline
trapper

Registered: 05/17/10
Loc: Alaska
NW I have heard of the vacuum problem in the oil reserve w/ some polaris year models, if I remember correctly some type of venting was the fix.
Sounds like the recent skidoo 550's are having, at least in some cases, preignition issues and subsequent piston/cylinder damage which I presume is the result of overheating.

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#3063658 - 03/08/12 04:53 PM Re: Tundra 550f [Re: Tradbow1]
Kusko Offline
"Mr. Mayor"

Registered: 12/23/06
Loc: Bethel, AK
When it's warm out here, I'll stop frequently to let it cool down. I'll raise the cowling up and put snow on the muffler. I get especially concerned when the wind is at my back when I'm driving.

I don't pull giant loads with mine. I don't break trail with mine. I don't go fast.

One thing they did was add more ventilation and heat shields on the muffler/exhaust. My buddy has a temperature gauge on his. When it gets too hot, he cools it down. There is no guessing to it.
_________________________
"There are three things I have learned never to discuss with people: religion, politics and the Great Pumpkin." Linus Van Pelt

www.alaskafinandfur.com

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#3063672 - 03/08/12 04:57 PM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
Only time I over heat mine are in late spring when it is 20+ degrees out. Then I can hear the engine and feel the loss of power, so I usually park it and throw snow into the fan while it is running. Just try to be on top of things and not cause the damage. I still work my machines. I break trail and pull big loads.

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#3063722 - 03/08/12 05:19 PM Re: Tundra 550f [Re: Tradbow1]
Kusko Offline
"Mr. Mayor"

Registered: 12/23/06
Loc: Bethel, AK
We don't get the cold like you do....well, we did this year. When those machines didn't have as many miles I was more prone to work them, but now, I'll leave that up to my electric piano. wink

I work on my own machines too, unless it's something major with the engine. What gets me is when there is a cracked weld I can't see. It's caught me twice on my '06 Edge touring.
_________________________
"There are three things I have learned never to discuss with people: religion, politics and the Great Pumpkin." Linus Van Pelt

www.alaskafinandfur.com

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#3064209 - 03/08/12 08:07 PM Re: Tundra 550f [Re: Tradbow1]
Tradbow1 Online   content
trapper

Registered: 12/15/11
Loc: AK
I dont own a cargo sled yet. Was out predator calling off of a trail that wasnt so long ago groomed. There's some new powder.

Sleds at the shop...we'll see what the verdict is. carbs were iced up badly, choke was froze, god knows what else....15 miles of trail riding...this thing is called a snowmachine isnt it????

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#3064507 - 03/08/12 09:38 PM Re: Tundra 550f [Re: Tradbow1]
Spek Jones Offline
"FATHER"

Registered: 01/10/09
Loc: Homer, Alaska
Maybe you tried it, but with a seized piston you can sometimes
limber them up and get them running again, and not have to walk
home. Depends on how badly they are seized. Usually it's the
left cylinder (farthest from the fan) and the piston galls to the cylinder wall on the exhaust side of the cylinder. You can't turn them by the pull rope but you can cut a short stick about 1 1/2" in dia to use as a punch and set it against the clutch and hammer back and forth on the clutch until the piston frees up. If it frees up, the ring groove on that piston will be smeared over so you will not have good compression on that side, but it will still run to get you home. But, here again, kinda baby it along, don't wind her out.

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#3064540 - 03/08/12 09:48 PM Re: Tundra 550f [Re: Tradbow1]
Bushman Offline
trapper

Registered: 12/28/06
Loc: Alberta
Hmm I must be in denial. I run several of them, I work them hard in mountain conditions, pull extreme loads, use them during chinooks, and have no problems. Late March and early April can be 70 degrees in the day and below freezing at night, they bog down in the day in those conditions and you have to feather the throttle to get them rolling. I can see all you guys will be swapping up to Bravo's.

Nice tip Spek...it's filed.
_________________________
www.sheepcreek.net www.compassmedia.ca

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#3064586 - 03/08/12 10:03 PM Re: Tundra 550f [Re: Tradbow1]
fishermann222 Offline

"OX"

Registered: 12/22/06
Loc: Bethel, Alaska
I never had a problem with mine either. I rebuilt it at 7K and it needed to be rebored, but it wasn't horrible. Internet snowmachining is easier on them than real life.
_________________________
I survived the Tman crash of '06

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#3064726 - 03/08/12 10:58 PM Re: Tundra 550f [Re: Tradbow1]
northway Offline
trapper

Registered: 01/25/07
Loc: Tok, Alaska
I ride mine, but maybe not as hard as I used to. You can go to any site and whether it be the 550 polaris or 550 skidoo, both engines have had their issues with burning them up. I've ran my 03 550 HARD, and no issues. But after burning up the 05, I tend not to run them balls to the wall anymore. Just a fact of life with those engines and I would rather keep mine running versus not!

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