Thanks for the info and help. I got it changed out yesterday with little problem. It's streaming out quite well now. What I didn't find out until I was almost done was that somehow (my friend speculates it was a mud dobber) my hose within was caked with mud inside and also prevented it from releasing. The 7 year old impeller really didn't look in bad shape so the blockage was probably more the problem but it didn't hurt anything with replacing the impeller for sure. My friend has it had happen so many times that he actually keeps a wire in his release hole so as to prevent the insects from getting up in there when boat not in use. It seems pretty small to me but what do I know.