We took delivery of our 2012 20 SL (Salt Water Series) with a 70 HP Yamaha (max HP) in June. We have 13 hours and have been breaking in the engine as instructed. The other day we decided to take a longer trip down the river to see how she would perform. We have 25" logs so the maximum capacity is 11 people. We had the Bimini up, 1/2 tank of fuel, with 6 average sized adults and a few coolers onboard. When we took delivery we were instructed with the 2 log pontoon it is not necessary to trim the engine up underway. With the engine trimmed down at about 3/4 throttle the engine started to lug. I played a little with the trim to see if that would make a difference but the engine still lugged and missed a bit. At slow speed and idle it sounded fine. Anyone else experience this happening? Any thoughts? On a better note we love our Amber Yellow color. We have had many positive comments and thumbs up. The people that have stopped and asked about it have been amazed that Bennington has stopped producing this color. They think it's unique and a real head turner. Glad we took delivery before the production ceased on the Amber Yellow.