I have a 1989 60 hp evi that is running o.k except for the top cyl. will not keep running unless I hit the primer button on remote control. I have had the carb off 2X & done everything I could think of and this last time I actually took off the lead ball (last resort) on top of carb bcuz it had been squashed into the opening compared to the other 2 carbs. I basically had to pry, piece, etc. it out of the opening so it's no longer useable. My ? is what actually does that lil ol lead ball do in there?... and can I get one for cheap somewhere...like out of one of my shotgun shells or ???... please help. Thnx.