While I'm ordering new drain plugs/o-rings for my '75 50hp, I am considering replacing the water pump impeller, just because it's an old engine and I don't know if it's been done yet. Have an OEM manual, but it does not have specific directions for replacing this part. Is it difficult, and what is the procedure. How much of the motor do I have to disassemble to complete the job? Do I need any special tools?
