Ok the boat has ran good all week 5 times fishing. Run it good long runs. About a half a tank a day. That's about 8 gallons of fuel. Today it ran good until the end of the day. It started to miss a little at idle when in gear. Then at the last part of the day. It did it again. I started it up. Gentle eased on the throttle and it died. Was very hard to start. After about 5 minutes of trying I was able to hit the throttle hard foward and ran it at 5500 rpms for about 3 Mike's to the doc. When I got to the doc and let off the throttle it died and would not start again. Pulled the plugs and they were all black. All same color even. Checked the oil it is at the too of the braided cetiin. No gas in there and looked good. Light brown. Checked the spark plug gap and it was a little off. Guess the mechanic regaled them to close. I'm headed to buy new plugs. And will gap them at .035. I just pulled all the fuel out and will start with fresh gas in the morning.. what could be causing this intermittent problem