So did my maiden voyage on my home lake today. Yesterday changed oil, installed new plugs and ran engine. Everything seemed fine but didn't idle well. Has half a tank left in from last year. Used marine stabil ethanol treatment and sea foamed when put away for winter, filled up tank today used more ethanol treatment. Launched. Engine starts no issues. Idles rough and will stall without throttle. Drove a few miles at least. Tried to setup for a troll, engine running rough at trolling speed. Pulled lines and ran for a good 10 miles on plane, no issues. Setup for a troll,again, engine ran ok bit not great at a trolling speed. Stalled out a few times. Need to give it throttle. Ran back to the launch. Stalled coming into the dock. Chewed through a quarter tank of gas on an 85 gallon tank. Thoughts?