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  1. #1

    Having a brainfart 155mm pump conversion gp1300

    So to do the 155mm pump conversion for the 03-04 go 1300s all I need is the impeller duct? P/n 6B6-51315-01-00. And maybe a different impeller? Might be able to get one for next to nothing. And all the other parts are the same?


  2. #2
    Tool Bag water worx's Avatar
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    it already has a 155 pump

  3. #3
    Not the 03-04. The 05+ have the ho 155 pump.

  4. #4
    Tool Bag water worx's Avatar
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    Its the same pump the only diff is the big hub on the "HO pump"

    All XL/XLT/GPR 1200/1300 had 155 pumps.
    Last edited by water worx; 06-06-2019 at 06:56 PM.

  5. #5
    Dave in DE's Avatar
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    Are you trying to do the 2" spacer upgrade from an 05? Is that what you're asking?

  6. #6
    butterbean_29512's Avatar
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    I run a HO pump on my 00 GPR. Big improvement over the original, and I didn't even bother with the 2" spacer.

  7. #7
    Not the spacer I'm just wondering about the conversion. I thought the duct was 150 on the 99-04 gprs and 05+ had the bigger ones. So what is the actual difference between the 2 then, and what do I need to convert?

  8. #8
    butterbean_29512's Avatar
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    The diameter is 155. The difference lies in the hub. It's a larger hub. I think the shaft and bearings are different also. I bought mine as an assembly. It was a bolt on replacement with mine...not sure about yours. I love mine. I run a dynafly 14/19 .

  9. #9
    I crossed all tha p/ns between 03 and 07 and the only different one is the duct/pump housing

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