Maybe the question should be Why did the pump fail AGAIN? Are you running the boat out of water with no hose on it? If you're running on the hose do you have enough water getting to the muffs? Are your water pick ups plugged? Are you running in skinny water and your pick ups are getting plugged from sand, mud, weeds, etc? You should easily be able to get 2+ years out of an impeller.
Sorry, no other pump, no electric one either.
is there other boats using similar water pumps so i can put in my engine?