I inherited a 7.5 hp Gamefisher Motor, I started to check it out with the obvious.... 1) Compression: I checked and it is perfect, 2) Fire: I tested for spark and there is none coming through the Wire... I figured after being in storage for so many years the points are corroded.... So I began to disassemble. I took off the cover, the fuel tank and filter, the pull rope assy., and now can't find out how to take of the power head.... Do I need to use a puller??? Any help would be greatly apperciated, Thanks, BCavitt