engine guardian system mercury,2017, 90 hp 4 stroke, rough idle and stalls, changed plugs ,still same problem. was running great, then all of a sudden, no power and rough idle and then eventually stalled.25 hrs on mtr.
Oh sorry that was me 15 yrs ago, I just was continuing, PROBLEM SOLVED, this is my first new boat, I was doing a few things old school. My other boat is a 1976 16' Star Craft (Super Sport 160) with 1974 850 Thunderbolt. I am learning all the newfangled electronics etc. again Sorry
