outboard primer bulb not getting hard

Main motor is fuel injected and has no bulb. I replaced the bulb and it will not get hard. It generally starts with a partial blockage, where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. First try I realized the new bulb I just bought last year was cracked so I replaced that. Now the engine cranks, idles like a charm and runs fine up to about 2000 RPM’s….. beyond that it simply is not getting the gas it needs. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. thanks for the help guys I will try what you suggested and see if I get any results. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. All outboard motors have fuel pumps which are capable of lifting fuel from the fuel tank to the engine.

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