I'm thinking about replacing the water pump or impeller on my outdrive. I've never done it before and have owned this boat for two years, so it must be due, or overdue. My question is, should this procedure be left for a seasoned marine tech, or can somebody with at least a mediocre mechanical ability do this job. I've read the manual on the procedure and I'm a little "iffy" about it. Are my fears warranted, or is this really no big deal, Thanks