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Thread: 34cc Heads for 2.5L Mercury
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10-23-2020, 12:31 PM #1
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Mercury Jake liked this post
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11-01-2020, 12:23 PM #2
To da top
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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11-06-2020, 07:10 AM #3
What psi would these put me at, stock moto?
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11-06-2020, 07:19 AM #4
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
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11-06-2020, 09:21 AM #5
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.
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11-06-2020, 04:25 PM #6
34cc should read 145ish lbs lbs which needs atleast 91-93 octane. We have 93 around here and its been fine
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12-02-2020, 09:12 AM #7Member
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12-04-2020, 10:13 AM #8
Replied to the PM Ocean
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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12-05-2020, 10:19 PM #9New Member
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Is $250 plus shipping your best price?
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12-05-2020, 10:23 PM #10
Pm sent
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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12-16-2020, 01:05 AM #11
How do you think these would work on a 1998 200 efi bone stock?
Blazer 202 Pro V with Merc 225
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12-16-2020, 07:20 AM #12
Sent you a PM
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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01-14-2021, 09:19 PM #13
Btt
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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01-18-2021, 05:20 PM #14New Member
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PM sent.
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01-19-2021, 10:06 AM #15
Sold
thanks S&FGo Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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