I am about to buy a 50 hp mercury and the boat has set for a few years. started up great cleaned everything and put oil in the cylinders before i started it just incase there was rust or something. Just a quick shot of wd 40. anyways the engine runs great but the water pump doesnt seem to be working. I've looked on ebay and everyplace I can think of and nothing matches up. I took the serial number off the front on the mounting plate it says 4144978 can anyone point me in the right direction where to find the kit? or is that the wrong number? Any help would be greatly appreciated.