could anyone help me out and tell me what could be the problem?the motor is 2002 75hp merc.the #1 plug is geting weak spark, both of the others are fine.it has a CDM if that matters it also bogs down when u gun it, but at full throttle its fine.when u just put it in gear it spits and sputters so i cant troll with it.any help would be great,i dont have $70/hr to go get jerked around at a shop