Yamaha F250BTXR 2009

by Richard Lininger
(Boulder City, Nevada)

The engine bogs down and shuts off over RPMs above 1800. I have replaced replaced all fuel lines from inside tank and throughout the engine. Had both low pressure and high pressure pumps replaced including all filters. Engine will stay Running at higher RPMs while in neutral. But when put under load in gear it shuts down fuel filter stays full even when it shuts down under load. It works properly at lower rpm. The low pressure pump turns off and on at the proper intervals. I can run it up to the 1600 to 1800 rpms without problem. Plugs have also now been replaced without change. No engine error codes show at dealer when hooked up to computer or on command link system. Have any ideas?

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