I have a 1968 55 hp evinrude triumph model #55872. It starts and runs great, lots of power but when I get cranked up and skipping along the engine will all of a sudden just kill. It usually starts right back up and away I go again. Sometimes though the fuel flow has stopped and I have to squeeze fuel into the engine in order to get going. It runs real good when I first put in but after a while it starts killing on me more frequently. Can anybody give me some possibilties of what might be wrong? I appreciate your response. Andy