She had a feeling and mentioned that it might be a good time to replace the raw water impeller. We are headed up the Grand Manan Channel tomorrow and it may have let go somewhere along the rocky coast with twenty foot tides. How do they do that?
Be thankful you have a traveling partner that knows enough and participates at that level. The perfect one also knows tools well enough to hand you the correct one when asked.
I know the standard advice is to replace the impeller annually, but that could be anywhere between 50 hours for a recreational boat and 1200 or more hours for commercial use or someone on the loop.
How many HOURS are people getting on their impellers before failure?
If you replace annually you have no idea how long they last.