Yamaha 225 4 stroke loses fuel pressure at all rpms. I have new pressure pump, new lift pump, pumped the tank, all new fuel lines, new fuel filters, new filter between fuel pump and injectors(Chris v). It acts like it is running out of gas but you can pump the bulb and it will keep running. I even used a separate gas tank hooked straight to the motor to rule out a problem with the pick up tube in the tank and it still quits. The bulb is not sucking flat it just goes soft ,it won’t stay pumped tight. Any info would be greatly appreciated.
check the o-ring on the primary filter on the engine, make sure its not pinched and the retaining ring is not cross threaded(easy to do)
Savage1 - Mine is doing the exact same thing. Especially at idle. Have to pump the bulb while putting boat on the trailer. Tune-up, new pump, new filters, etc., Startron in the gas. I have an appt. with ChrisV on the 14th. If you figure something out, lemme know.
SeaPro 23 WA Yam 225
Key West 17’ Stealth Yam 115
High Tide 15’ Yam 50