2015 Mercury 115 EFI

by Mike Jeno
(South Carolina)

Engine starts runs perfectly up to 4000 RPMs, above that, the engine loses power and stumbles. If I throttle back to idle for a few seconds, I can run it back up past 4K rpms for a couple minutes and it will stumble again. I have checked the in-tank, and the two inline fuel filters, tested the injectors, the trim and neutral safety switch show the correct ohms.... I’m stumped!!!!

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