I was given this motor and does model 72 mean it's a 1972? It has a plastic propeller 8 X 9 1/4, 9 spline. I'm not able to find replacement. Local prop dealer gave me 10 spline 8 X 9 1/4. I also would like to know how to check the water pump. I would like to use this motor in 1 days. Thanks
