I have a 2 1/2 year old 3ym20 with about 400 hrs on it. After returning from a six week cruise I found the raw water pump leaking. I thought it was the hoses but it turned out to be the bearings in the pump itself. This seems to be a bit early for a water pump to give up the ghost. Any one else have this problem ?
Depending on where you are located, the type water and solids in the water, and also winterization techniqes, raw water pump assemblies and impellers may need service every year. If I didn't replace the impellers on mine every spring, it would surely need replacing at the most inconvenient time later that year.