i shut off the raw water valve and put a 10 ft garden hose in a gallon of 50% pink stuff and attached the other end to a take out on thr rawwater intake. i started the motor and nothing happened. the level of the pink stuff did not go down. i let run for a time but still nothing. i took the hose out out of the gallon jug and checked if there was sucksion and there was. later i held the gallon jug up higher than the engine and got about half a gallon into the engine. but by his time the engine was overheating so all i got out of the exhaust was staem so i quit. any ideas?