I have an older 65 hp Mercury with Thunderbolt ignition. Serial # 7051383.
I have rebuilt the motor and bottom leg as well as the fuel pump.
I am having an issue with the motor when at full speed. It seems like it runs out of fuel after about 30 to 40 seconds of full throttle. At half throttle it runs great and at low throttle it also runs great.I do not know where to turn next. I have also tried a different fuel tank and hose but it still does the same thing. Anyone have any Ideas???