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  1. #1

    Economical STX-15f fuel pump replacement

    Wanted to post this just in case anyone needs to replace the fuel pump in their STX-15f. The Airtex E8335 fits perfectly and available from both autozone and advance. Download an advanceautoparts coupon from retailmenot.com, and order online for store pickup, I managed to get my pump for less than $50. You will also need a new fuel strainer, the part number for that is an FS203. Both of these are spec'd to fit a Subaru Impreza, ~2007:

    Fuel pump: Airtex E8335
    Strainer: Airtex FS203

    The pump will need to be wired properly to ensure it's running in the right direction. If you hold the pump with the fuel outlet pipe up and the terminals on the bottom, the negative terminal is on the right and the positive terminal is on the left.
    Click image for larger version. 

Name:	E8335 Polarity (5).jpg 
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    The wires from the wiring harness to the fuel pump housing are as follows: black is negative, red/white is positive.

    This pump is spec'd to flow up to 55 gph (about 200 lph) at 100 psi (ski requires about 43). Don't waste money getting a 255 lph pump, a 170hp non-supercharged engine only requires approximately 70 lph and a stock Subaru pump will provide plenty of gas.

    The fuel pressure regulator is also contained inside the pump housing in the tank. I did some research on an off the shelf auto replacement that could be adapted. Good candidates are the BWD/Intermotor 23035 (43 psi) from Advance or the GP-Sorensen 800-171 (45 psi) from Autozone. Both are Vacuum assist modules that attach directly to a fuel rail. Vacuum assist essentially lowers the fuel pressure at idle, so that can be left open in this application. I purchased the BWD module, it probably could be adapted by attaching a 3/8 fuel line to the inlet and reducing it with some brass fittings. However, there isn't much to clamp the hose to on the inlet (has the o-ring) and it would probably have to be put in the tank just in case the line pops off. Probably easier to just go the aftermarket route.


  2. #2
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Walbro gs342. ~$100.

    Sean

  3. #3
    I have a 2003 STX 12F...will these fuel pumps fit my ski? I have searched for days and not found an answer beyond getting the $400+ OEM part. Any advise is greatly appreciated!

  4. #4
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    yes, this has been answered several times, just make sure that your regulator is good when you replace it.

    good luck,

    Sean

  5. #5
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    I just went and checked the airtex pump and it has a different connector and does not come with the proper one, where did you get the connector from? In the walbro package it's included.

    Sean

  6. #6
    Can't remember regarding the connector. I replaced this pump previously with another one from Advance and I think it had the connector with it. You can get the spade connectors from Radio Shack and crimp them on the wire or build them yourself. As long as the wiring is correct, red/white to positive, black to negative, it will work properly.

  7. #7
    @tranter's ski:

    If the kawasaki part number is the same on both skis, then it should fit. The only issue is the physical size of the pump. Since it's a return type system, excess fuel is returned to the tank via the pressure regulator.

  8. #8
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    I wouldn't trust a crimp job on a fuel pump. I have replaced the pumps in the past with the walbro and I ended up doing the same this time after not getting the connector with it. The pump and install kit with shipping was $85 which is what AutoZone wanted for the pump.

    Sean

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  10. #9

    How do you attach the fuel pressure regulator.

    Quote Originally Posted by squared View Post
    Wanted to post this just in case anyone needs to replace the fuel pump in their STX-15f. The Airtex E8335 fits perfectly and available from both autozone and advance. Download an advanceautoparts coupon from retailmenot.com, and order online for store pickup, I managed to get my pump for less than $50. You will also need a new fuel strainer, the part number for that is an FS203. Both of these are spec'd to fit a Subaru Impreza, ~2007:

    Fuel pump: Airtex E8335
    Strainer: Airtex FS203

    The pump will need to be wired properly to ensure it's running in the right direction. If you hold the pump with the fuel outlet pipe up and the terminals on the bottom, the negative terminal is on the right and the positive terminal is on the left.
    Click image for larger version. 

Name:	E8335 Polarity (5).jpg 
Views:	1311 
Size:	38.7 KB 
ID:	298185

    The wires from the wiring harness to the fuel pump housing are as follows: black is negative, red/white is positive.

    This pump is spec'd to flow up to 55 gph (about 200 lph) at 100 psi (ski requires about 43). Don't waste money getting a 255 lph pump, a 170hp non-supercharged engine only requires approximately 70 lph and a stock Subaru pump will provide plenty of gas.

    The fuel pressure regulator is also contained inside the pump housing in the tank. I did some research on an off the shelf auto replacement that could be adapted. Good candidates are the BWD/Intermotor 23035 (43 psi) from Advance or the GP-Sorensen 800-171 (45 psi) from Autozone. Both are Vacuum assist modules that attach directly to a fuel rail. Vacuum assist essentially lowers the fuel pressure at idle, so that can be left open in this application. I purchased the BWD module, it probably could be adapted by attaching a 3/8 fuel line to the inlet and reducing it with some brass fittings. However, there isn't much to clamp the hose to on the inlet (has the o-ring) and it would probably have to be put in the tank just in case the line pops off. Probably easier to just go the aftermarket route.
    How do you install the BWD/ Intermoter? What attaches to where in your scenario? The regulator in the OE housing just attaches in the one spot, ? correct? How are the connections in the BWD/intermoter regulator attached?

  11. #10
    Hi all, noob to the site but not to skis. Anyway I ran across this post while searching for a replacement pump for my 15f. I ordered the Airtex fuel pump simply because of the availabity from AdvanceAuto and I wouldnt have to wait for shipping. I remove the the fuel pump assembly and then the fuel pump itself from the sleeve last night and am curious about which connector smokey and squared are talking about. I'm assuming you all are referring to the connector that provides power? Thanks in advance.

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