Fuel Pump 583 38s

[FreezerBurnt]

95 STX 583 with 38s

When I was cleaning carbs and such the other day my bros mention to me something I forgot over the summer,my fuel pump would leak and and not pump at WOT at the end of season

So I took apart my fuel pump

One of the diaprhams in the fuel pump is shot

Sled starts fine 1 pull ,idles great but WOT it is starving ,though I rarely go WOT

I went to the Ski-Doo dealer and they only sell the whole pump and not diaphram kit -$100

I ask for an universal one but he said it is a no go

he said I need the specific pump for a 38mm carbed 583 :dazed:

Now can I use one off a 92-93 Plus X 583(friend has one for cheap) or a 582 with 38s

Can I use one off a FZ/MXZ with 40mms?

thanx in advance SWRules

[Thumbdoctor]

FB,

Bomby parts book says the pump P/N 403901200 is unserviceable (What BS!!!). Check the Mikuni number stamped on the pump. If it's a DF-52-136, Royal Distributing has a kit P/N 07-187-11 $11.95. If not, you need to find a dual outlet (dual stage) pump that delivers about 70 liters per hour. Royal sells a 65 liter per hour for about $65.00 but I 'm sure you can find one used for cheap. Usually one good backfire will perforate the diaphram or blow a check valve.

Good Luck.

T.D.

[scooter27]

Originally posted by FreezerBurnt@Oct 17 2004, 12:36 PM
95 STX 583 with 38s

When I was cleaning carbs and such the other day my bros mention to me something I forgot over the summer,my fuel pump would leak and and not pump at WOT at the end of season

So I took apart my fuel pump

One of the diaprhams in the fuel pump is shot

Sled starts fine 1 pull ,idles great but WOT it is starving ,though I rarely go WOT

I went to the Ski-Doo dealer and they only sell the whole pump and not diaphram kit -$100

I ask for an universal one but he said it is a no go

he said I need the specific pump for a 38mm carbed 583 :dazed:

Now can I use one off a 92-93 Plus X 583(friend has one for cheap) or a 582 with 38s

Can I use one off a FZ/MXZ with 40mms?

thanx in advance SWRules

[snapback]353876[/snapback]

I had a 1994 stx rebuilt the fuel-pumps twice the rebuild kits suck save yourself the hassel of getting stranding in the middle of a field and buy the whole pump its worth the cash i know from experience twice......

[FreezerBurnt]

Originally posted by Thumbdoctor@Oct 17 2004, 03:14 PM

FB,

Bomby parts book says the pump P/N 403901200 is unserviceable (What BS!!!). Check the Mikuni number stamped on the pump. If it's a DF-52-136, Royal Distributing has a kit P/N 07-187-11 $11.95. Usually one good backfire will perforate the diaphram or blow a check valve.

Good Luck.

T.D.

[snapback]353929[/snapback]

Thanx TD

That is what I said to the parts guy about it not being seviceable

He also said I need 70 fpm

Anyway that one good backfire comment

I think I posted about that backfire this past Jan/2004 now that I think of it,

It split my airbox :dazed:

I guess that is when the diaphram ripped

Yet I still rode the sled after though,like it would bog on full throttle

Thanx for the help

[Thumbdoctor]

FB,

There's one on EBAY here.

Cheers,

T.D.

[FreezerBurnt]

The only # I found on the pump was 44 12 which was on the bottom piece

I have the 95 Bombardier Manual

And under the fuel pump section it shows 3 diferent pumps

1 for the S sries 380/503

1 for the 470/580

1 for the 440/583/670/779

The 1st 2 have the pumps pix in sections

BUT the one for 440/583/670/779 only has the pic of the pump it self but no breakdown of sections :dazed:

Good news on another front(rear idler shaft) is I went to another dealer trying to find a used shaft and he knew what I was looking for and told me Skidoo uses a dif shaft diameter and and I could use a 6205 with diferent interior diameter as I have a shaft from an older Doo but could not get the 3rd idler on with a normal 6205

It sure is nice to have people that help you save $$$ instead of $85(new shaft) it cost me $7 for a bearing that would help me by using an older sled shaft :thumbsup:

[FreezerBurnt]

Is the ebay pump of the 99 FZ 500s 494 a 70fpm?

[FreezerBurnt]

Hey T.D.

another ?

I got a fuel pump off a 98 MXZ 670 when I got the SC 10 too :thumbsup:

will this work on my 38s?

It is a lil diferent looking then mine :dazed:

It must be at least 70fpm?

thanx again SWRules

[hillpounder]

fwiw, on some of the mikuni pumps the diaphram is stretched or tensioned to spec when installed on the pump body when assembled at the factory. They are considered non- sevicable. I've had them apart and back together and they worked but probably not to mikunis spec? Kind of like stringing a guitar, anyone can put a string on but if its not tightend to the right tension the tone isn't right.

[Lasse]

Quote : Freezer Burnt

The Ski-Doo dealer said I need the specific pump for a 38mm carbed 583......

Can I use one off a 92-93 Plus X 583 (friend has one for cheap) ??

Can I use one off a FZ/MXZ with 40mms ??

I got a fuel pump off a 98 MXZ 670 will this work on my 38's,

It's a little bit different looking then mine ???



The answer is : YES !!!! on all the above questions !!