Hello all, I have a 1971 Merc 500 that starts great and idles great, however, when I put it in gear it dies (most of the time). Often times after it dies I have a difficult time starting it again. It almost seems as though it is flooding out. If I start the motor and push the small black lever ( throttle advance??) forward the motor just roars-- runs great. If I do get the motor to run correctly it seems like I'm burning thru fuel way too quickly. Any suggestions??