I own a 1987 Bayliner Capri 19' with a 125 Force outboard. I am not the best at maintenance but have kept it running well since 1992 when I bought it used. I've changed the plugs a few times, the impeller a couple of times, and the fuel line from the tank to the motor. Otherwise it's original. I think that it's not getting enough fuel at open throttle. At neutral at full throttle, it runs fine. From a stand still, it starts off fine full throttle, planes out, and gets to about 36-37mph. After about 10-15 seconds, it starts jerking, hesitating, and running rough. I have to back off to 1/2 throttle and run around 20mph. I can squeeze the primer bulb once or twice at this speed and it will pick up speed and run better. I can usually replace anything that is needed, I'm just not great at diagnostics. I ordered a fuel pump kit which was just the diaphragm and gaskets, not the valves. Needless to say, that didn't help any. Should I replace the valves in the fuel pump, fuel line from tank to motor again, or would it be more in the carbuetetors. Any advice will be greatly appreciated.
