snowmobile repair

[nhboat61]

Thanks everyone,

I found Croccos in East Wakefield, on Rt 153, came by today an picked it up.

Maybe.... we eventually get some snow ...

[WINNOCTURN]

Originally Posted by nhboat61

Thanks everyone,

I found Croccos in East Wakefield, on Rt 153, came by today an picked it up.

Maybe.... we eventually get some snow ...

nhboat61,

Please let us know what they did to get it running. We will all learn from it!

WINNOCTURN

[nhboat61]

Originally Posted by WINNOCTURN

nhboat61,

Please let us know what they did to get it running. We will all learn from it!

WINNOCTURN

Needle valve in carb stuck open. Gasoline filled the cylinders to the point it was running out of the exhaust.

Took apart the carb, replaced the gaskets and reseated the valve and changed the plugs. Brought it back today, runs like a charm .... now we just need snow.

Very reasonable on the cost as well.

[pcmc]

Is this referring to the needle that hangs below the slide?
The slide is what opens when you squeeze the throttle with your right hand.
I'm guessing out of habits, the throttle was squeezed to simulate pumping the gas pedal in an older carbureted car to set the choke prior to starting the engine.(?)

I would immediately (yes, before riding the machine) call the repair shop and ask if they inspected the carb to make sure nothing was altered inside the carb.

If they simply did a visual looking into the throat of the carb and saw the slide stuck open, then squeezed the throttle to take tension off of the slide and needle, and wiggled it to align it with the slot that the needle fits into, this may not have fixed the problem.

If there are worn or even the wrong parts in there, the next time you squeeze that throttle the needle may get stuck again! Next time you may be on your favorite stretch of wide open trail, or showing off in a cramped back yard with limited response time.

I hate to seem like I'm trying to scare you, but I'd hate worse to hear you were injured due to an accident because your throttle stuck wide open.

It was mentioned this carb needed an update kit. I would make sure the correct fix was done and not an alternate fix via the wrong needle put in there.

Does anyone know if the needle should come up out of the port from the main jet, or should the tip remain hanging down into the hole slightly? I don't have any machines here I can check.

If this is the valve on the float in the bowl of the carb then this a totally different out come. Clean and adjust the float along with the rest of the carb and your in good shape. The more I think about it, it's probably the float, but if rather be safe than sorry.

[MAXUM]

Originally Posted by pcmc

Is this referring to the needle that hangs below the slide?
The slide is what opens when you squeeze the throttle with your right hand.
I'm guessing out of habits, the throttle was squeezed to simulate pumping the gas pedal in an older carbureted car to set the choke prior to starting the engine.(?)

I would immediately (yes, before riding the machine) call the repair shop and ask if they inspected the carb to make sure nothing was altered inside the carb.

If they simply did a visual looking into the throat of the carb and saw the slide stuck open, then squeezed the throttle to take tension off of the slide and needle, and wiggled it to align it with the slot that the needle fits into, this may not have fixed the problem.

If there are worn or even the wrong parts in there, the next time you squeeze that throttle the needle may get stuck again! Next time you may be on your favorite stretch of wide open trail, or showing off in a cramped back yard with limited response time.

I hate to seem like I'm trying to scare you, but I'd hate worse to hear you were injured due to an accident because your throttle stuck wide open.

It was mentioned this carb needed an update kit. I would make sure the correct fix was done and not an alternate fix via the wrong needle put in there.

Does anyone know if the needle should come up out of the port from the main jet, or should the tip remain hanging down into the hole slightly? I don't have any machines here I can check.

If this is the valve on the float in the bowl of the carb then this a totally different out come. Clean and adjust the float along with the rest of the carb and your in good shape. The more I think about it, it's probably the float, but if rather be safe than sorry.

If I recall when I updated my 550 after it blew chunks there are the main and needle jets, then the needles themselves. The needles do not clear the jets completely at WOT. At the time I was fixing mine the jetting was the only fix they recommended, now they are doing a whole kit that includes a whole lot more. If you would like to read more about it there are ample write-ups on the problems and fixes from Polaris... here is just one of many

http://www.hardcoresledder.com/forum...ne-issues.html

As much as I loved my sled I was done with that 550 after two meltdowns, no support at all from Polaris, clear indications they had no idea how to really solve the problem, I will never own another one. I just picked up the same exact machine with a 600 Liberty under the hood. Been happy ever since.

[WINNOCTURN]

NEEDLE & SEAT?

This is the "valve" that "Hangs" on the Floats. It can "swing" and stick as described in the repair applied. Not that common.

Polaris had some problems when they used a Brass on Brass Needle and Seat combination. Between normal or admormal ware the fuel could seep through and cause Hard starting or Flooding after not running from one day to the next. The simple fix was to, after riding Shut the Manual Fuel Valve OFF. Easier sead than done.

The real fix was to replace the "Brass Needle" with a Viton Tipped Needle. The Viton Tip is a "rubber tip. They will virtually never leak. They were a little expensive, especially if you had a "Triple", at $25.00 each.

The actually swapping of the Needles was easy once you removed and disassembled each Carb.



Attachment 10171