I have a 2002 Mercury 115HP Salt Water series outboard (four cylinder, quad carby, oil injection, 2 stroke). My biggest complaint with the motor is that it idles on only two cylinders (this a Mercury system - not an engine fault) which results in both a rough idle and rough take off when accelerating hard (such as for water sports). I am uncertain what system causes it to idle on only two cylinders and am wondering if anyone on here knows and ideally knows if it can be converted to idle on all four cylinders?
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