Re: 402 merc power help
okay you need to do a fuel pump rebuild and a carb rebuild. Pull the carb and fuel pump, completely disassemble both. Get a gallon of Chem-Dip or similar carburetor soak. take all the plastic pieces off the carb and fuel pump. take all the hose fittings off your fuel pump. there should be 2 hose fittings that are threaded, and then one screw that is a 7/16" head I think. take those 3 out of the fuel pump, and soak all that along with the carburetor and all its screws and components. Make sure when you remove the idle screw on your carb you count how many turns out it is from a lightly seated position. If your motor is lacking fuel when you put it in gear, you just need to rebuild these 2 components, and also replace the fuel filter that is next to the fuel pump. if you still have the factory one, throw it away. go to academy, and buy the Moeller glass filter. it is very good and worth the 13 dollars. don't use cheap plastic filters as they will get leaks and pinholes and are very cheaply made. Also, when you rebuild your carb, make sure you get a new float, and needle and seat, and ofcourse all the gaskets. the fuel pump rebuild kit comes with the gaskets, the diaphragm, and the check valves. this should fix your problems.
