I have a beautiful 1967 Mercury 20 hp outboard on my 14' aluminum. Last spring I went to get it ready for the summer and couldn't get it started. I checked both plugs and was not getting any spark. The points seem to be in good condition so I am wondering what else I need to check. I am not very experienced with outboards but don't want to get rid of my grandpa's old mercury(good memories.) Any help would be much appreciated.