1989 225 evinrude winter project always ran merc before but could not pass these motors up also got a fingerported 2.7 ltr that will be at a later date. im at the carbs now had 59ds for mains way to lean for me mids and idles were stock. thanks for all your help that other link helped alot thanks again phil
The difference is the way it is reamed from factory, one is single bored and other is double bored. Easiest way to remember is C is for crossflows and D is for loopers and you should have 62-67D's depending on carb/engine series
