Yamaha F60TJR 2006

by Bob McHenry
(Seattle wa)

At wide open throttle the engine begins to miss and run rough. I have replaced the following with no change. Plugs, plug wires, coil packs, injectors, low and high pressure fuel pumps, fuel filters, VST service,ECM. Latest info on new ECM showed highest rpm at 5650 so not hitting rev limiter at 6250rpm. No matter what I replace it still runs the same.

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