Quick question about kickers stalking at idle speed while in gear. I absolutely love my 2015 Merc 9.9 4 stroke kicker but I've noticed after fishing for a bit, it wants to stall while in gear at idle speed. Is that due to the plug fouling or just the idle being too low? I turned the idle screw 1/4 turn and it seemed to help a bit, but I don't want to speed up the idle cruise speed of my boat as we like to go as slow as possible. What about changing to a different plug? Maybe a hotter plug or something?