Just an FYI. I would make it part of your regular maintenance schedule if I
were you. Mine gets changed EVERY spring regardless of condition. Cheap
insurance.

Buck
wrote in message ...
Thanks, I do believe it would be best to replace the impeller. I did
that once, many years ago on a Mercury outboard and as I remember it
was pretty easy to do, but could someone please give a brief step by
step heads-up on replacing the impeller only on a stern drive lower
unit? Thanks,
HJJ