Bought Boat out of storage, Drained old Gas, Filled with No E 91,Cleaned all 4 carbs, new plugs, new filters. Runs smooth up to 2400 RPMs on the lake then bogs. out of water with no load it runs on up as it should. Ran around the lake for an hour it purrs like a kitten up to 2400 RPMs, never got hot, Pee hole runs full flow. I do know that the Ignition switch was replaced. Any things I can check to get the RPMs up ?