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  1. #1
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    34cc Heads for 2.5L Mercury

    SOLD

    I have a clean set of 18488 C3 heads that were cut to 34ccs. Asking $250 plus the ride.
    Click image for larger version. 

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ID:	475700Click image for larger version. 

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    Last edited by Go Time; 01-19-2021 at 10:05 AM. Reason: Sold
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  2. Likes Mercury Jake liked this post
  3. #2
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    To da top
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  4. #3
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    What psi would these put me at, stock moto?

  5. #4
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    It varies depending on such things as exhaust port height, exhaust notch (150 & 175) , gasket thickness, etc.
    34cc heads are typically the smallest chamber heads you can use safely on a stock 2.5 200 2 stroke with premium pump gas.
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  6. #5
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    My Chris Carson rebuilt to stock 2.5, except cut heads to 138-141and I was recommended to use 90 oct ethanol free is why I asked about the psi.

  7. #6
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    34cc should read 145ish lbs lbs which needs atleast 91-93 octane. We have 93 around here and its been fine

  8. #7
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    Quote Originally Posted by Go Time View Post
    I have a clean set of 18488 C3 heads that were cut to 34ccs. Asking $250 plus the ride.
    Click image for larger version. 

Name:	A44A15EF-0B33-4207-A153-875F4547E7EC.jpeg 
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ID:	475700Click image for larger version. 

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    Pm'd, bump for ya!
    Last edited by oceanstatetuning; 12-02-2020 at 10:39 AM.

  9. #8
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    Replied to the PM Ocean
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  10. #9
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    Is $250 plus shipping your best price?

  11. #10
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    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  12. #11
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    How do you think these would work on a 1998 200 efi bone stock?
    Blazer 202 Pro V with Merc 225

  13. #12
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    Sent you a PM
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  14. #13
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    Btt
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  15. #14
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    PM sent.

  16. #15
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    Sold
    thanks S&F
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

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  1. Wtb mercury 2.5 34cc heads
    By Yingdog in forum Parts Wanted
    Replies: 6
    Last Post: 07-27-2019, 05:09 AM

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