On my 21' Open Bow with a 454, I still have the manual fuel pump. On the ramp, it is taking longer and longer to fire up. Is this normal? Should I be pumping the carb, or not? last weekend it took a good 3-4 minutes of cranking to get here going. Should i rebuild the carb? Or will putting an electric fuel pump on help it? what do I need to make the conversion? Thanks guys!