Hi. I need to find out what type of plugs to use and what model # for my 1993 mercury xr-6 150. I am guessing it is a 1993, the serial # is od188202. I am having trouble starting it when cold, sometimes it takes 30 minutes to start it up, but after runs for a minute or 2 it starts right up every time. I cleaned the carbs and changed the fuel filter. Thanks, Dave
