I have a 130 hp 3.0 liter Mercruiser with a Mercury Alpha 1 outdrive. The gas was probably as low as I hav ever had it, gauge says 1/2 tank. The boat started out OK, one good run across the lake, then I backed down and the engine sputtered out when idling. Then the boat rattled the rest of the day, like it was a bad idle. I trid to pull a skier but the boat never reach speed, with throttle all the way down it only went 20 when normally it is 35 to 40mph. Speed kicked in once but never again. Is this a water in gas issue or is there something else I should look for.
