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2006 EFI Merc Black Scorpion in Sanger V230
Started the season off with fresh fuel filter, separator and impeller. Been out quite a few times since then, boat was hesitant to start first time out after service. Thought it was air working its way out of fuel system.
Now at least 15 engine hours later, I still have an issue after about 5 minutes of being on plane running 15 - 20 mph. Engine will stumble and drop anywhere from a few hundred to a thousand RPM. Often perfect pass revs it a bit and you can barely tell a difference in the wake. Other times, we have to drop the rider and restart cause the boat won't maintain speed. Never dies, solid hole shot, cranks every time. So that rules out bad gas I thought I got from a shady station.
Acts like a fuel pump issue, losing pressure after a few minutes of running it. Only 370 hours, so I'm not convinced its the pump. Can hear it power up and charge the system with key on. Keep going back to my garage mechanic skills and not sure I primed the system properly.
I didn't fill the separator with gas when I put it back on, about the only thing I can think of.
Should I take the engine cover off and try check for air in fuel rail? Whats best way to get all the air out? Or do I have something else going on?
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