has 13 3/4 x 15 prop----engine mn--J88MSLCUS--S#---7484182-----WATER SEEMS TO BE PUSHING AWAY FROM MOTOR BAD---MOTORS STILL PUMPING WATER BUT IT SEEMS LIKE IT CAVITATING BAD----WAS TOLD I NEED TO CHANGE PROPS AND PUT A HYDRO FOIL ON IT---ALSO WAS TOLD IT THE ENGINE COULD BE A SHORT SHAFT--I DONT...