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    1995 Mercury 150XR6 No RPM past 4200

    I have the 1995 MERC150XR6 (SN:0G228702) mounted on 1995 Nitro 17 1/2 foot running a 22P prop, can not get past 4200RPM feels like it surging. So far I have done carbs 2 times, new reed valves, fuel pump, fuel hose, external fuel tank, plugs, link and sync, timing. Any ideas or help would be...
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    Mercury 150XR6 issues

    New to the board. I recently bought a 1985 Nitro boat with Mercury 150XR6, the motor has a few issues but need to determine year of engine before diving in. Serial # 0G228702 Issue is rough idle and feels like a miss or hesitation at WOT can only get about 3700 rpm. We have done a link and sync...
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