In July of 2007 i replaced my impeller....worked great all season long after that...had the boat winterized then march 08 after uncovering I discovered that I needed to replace it again..I was told that who ever winterized it might have overheated it....ok so I just unwrapped it again this year and discovered it to be totally cooked again...now it was winterized by a very knowledgeable mechanic...could there be an underlying problem causing the iimpellers to burn out so frequantly...this is two springs in a row i've gotta do this now...i have friends who have the same impeller now for 5 years so i'm kinda pissed.......help please........