I picked up a 2006 Yamaha F4 4HP from a friend. He bought it new and used it very little over the years. I have tested on my freighter canoe and it runs great. I am planning a very long, remote trip soon.
Question: should I replace the water pump impeller before I go? The local dealer says it should be done to avoid failure and engine damage. He wants $300 for the job. I am looking for 2nd opinions on whether this makes sense.