I have a 1971 merc model 200 - 20 HP that drops a cylinder at low RPM's but runs like a bear and fast at WOT. Changed plugs, visually checked wiring, have not pulled the fly wheel to look under that. bought the motor used 3 yrs. ago. Seems that the coil to the bottom cyl. was changed out at some point before I bought it. Need ideas guys please !!!!!!
