I have a friend looking at a 50 hp 1972 model OMC with push button shifting,it is on an old tide <br />craft and we are looking for info about the motor relating to keeping it on the water if it breaks down? Can you still get the parts for the push button shifting from OMC and if so are they worth purchasing or does it come to the point that the parts end up costing as much as the motor is worth or they are only available used? Give us your opinion, it will see alot of time on the water. Thanks alot for the help.