inherited the boat and engine which had been sitting at least 18 months w/ a 3/4 full tank of fuel. Changed the h20/water filter and oil. Have not changed the fuel - yet. Engine starts fine and throttles up nicely when in nuetral. Put it on the water and could not push her over 2000 rpm. Engine dn't die, but wouldn't throttle up. <br />Any ideas? Carbs? Filters? I'm guessing bad gas and or gunk, but why would it throttle fine out of gear?