Two years ago I purchased a 1996 donzi with a 4.3lx merc powerplant. The problem I have is if the boat sits for more than a few days, it will not start. My guess is the fuel in the carb is either evaporating or there's something wrong with the fuel pump. I understand this engine has a oil pressure senor switch that will not allow the electric fuel pump to work without the right amount of oil pressure. I've had number of opinions on this including installing a switch to tickle the pump until the carb is full of fuel. I guess what I'm asking is this a fuel evaporation problem, or is there problem with the pump. I've "hot wired" the switch at the oil pressure sender and this seems work. But there has to be a better fix than that. Once she's running, it starts right up.