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Motorcycle Forum / General / Snowmobiles / September 2008



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Re: Skidoo cuts out at trail speeds

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Tim - 12 Sep 2008 17:46 GMT
Okay the local shop charged me $200 to supposedly replace the fuel
pump, and the following winter the machine had the same problem again
out on the trails. (Mental note: don't use that shop again) We still
had a good trip, but had to keep the speeds real low (which is
annoying when you're trying to get somewhere across a frozen lake or
big, wide, open trails, but is just fine on twisty trails which we
spent alot of time on).

(Original problem: '00 SkiDoo (2 cyl ~500cc) drops to an idle after
20-30 seconds at higher speeds. Seems like fuel starvation problem
since it doesn't stall. If you wait a minute sitting there at an idle,
you can then go fast again for another 20-30 seconds. You can putt
around at lower speeds all day without a problem.)

---

From: "David Courtney" <adva...@powercom.net>
Date: Oct 29 2006, 11:07 am

   You really don't need an engine lift to remove the engine... that
whole
motor probably weighs 70 - 80 pounds.
   But, you probably don't need to remove the engine in order to get
at the
fuel pump anyway.  You may need to remove the airbox and carburetors
to get
access; but I've never seen a snowmobile where you couldn't service
the fuel
pump without removing the engine.
   According to the online parts fiche, it looks like your fuel pump
is
mounted on the bulkhead near the steering post?
   You should be able to move the carbs out of the way without
disconnecting anything except the fuel lines... leave the choke and
throttle
cables in place.
   I sure don't want to try to talk you into getting in over your
head, but
you're gonna probably spend $150 to get a $15 fuel pump kit
installed.  The
actual pump kit is a snap to install... probably take 10 minutes and
needs
no special tools.

"Tim" <tcan...@comcast.net> wrote in message

news:1162125157.389024.313530@i42g2000cwa.googlegroups.com...

> Looked at it yesterday, and the fuel pump is totally inaccessible under
> the motor. Can barely see it, nevermind get to it.) If I had more time
> and a proper engine lift I'd attempt it, but since I'm just a Joe
> Homeowner this one goes to the repair shop.
>
> Thanks for the info just the same; it's important to know when to "call
> it" and not try to fix it at home!
>
> T
Dave Ward - 14 Sep 2008 20:20 GMT
Have you checked the vent tubes on the tank - maybe kinked, creating a
vacuum in the tank.  Or maybe even a dirty, clogged fuel filter.

> Okay the local shop charged me $200 to supposedly replace the fuel
> pump, and the following winter the machine had the same problem again
[quoted text clipped - 53 lines]
>>
>> T
Wes 94 ZR580 - 15 Sep 2008 21:04 GMT
Another thing to check is the impulse line from the crankcase to the
fuel pump. Just replace that hose with a new piece because a leaky
connection, or soft hose can reduce the ability of the pump to pump. It
is the crankcase pressure through that hose that makes the pump pump.

Wes
94ZR580

> Have you checked the vent tubes on the tank - maybe kinked, creating a
> vacuum in the tank.  Or maybe even a dirty, clogged fuel filter.
[quoted text clipped - 56 lines]
>>>
>>> T
 
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