I recently picked up a 1966 6HP Chrysler Outboard. Starts and runs fine with one issue - something is wrong with the water pump. Took off lower unit and inspected impeller which appears fine. Looks like there was a gasket or ring of some sort on the top outside housing which contains the impeller. Its where the drive rod enters the impeller housing. Anyone know where I can get parts for this outboard and a copy of the parts schematic for that model? Thanks