Trouble with my warranty

I recently had my 2005 MOOMBA LSV over heat and took it to a local marina qualified to work on INDMAR engines. They found that my impeller had failed and ended up causing about $600.00 in damage to cables, wires, plugs and exhaust bellows. After labor costs the total bill was almost $1500.00. I have had my boat winterized and de-winterized every year since 2005. The shop in Michigan "Club Royale" that did the winterization work told me that the impeller is not an annual/100hrs. required replacement item however INDMAR and Skiers Choice have both told me otherwise. In addition to being replaced, the INDMAR owners manual states that the impeller is supposed to be removed and stored in an airtight bag as part of the winterization process. The last time I needed to have my boat de-winterized I asked what was involved to see if I could just do it myself. They told me to put the plug in, connect the battery and break in the boat slowly due to the engine preservation chemicals in the block and carburetor. Obviously they didn't follow the guidelines from the maint. manuals because they didn't need to reinstall the impeller. Since it sounds like Club Royale is not following the written guidelines set down by MOOMBA and INDMAR I think Club Royale should pick up the tab on this damage. Please reply back with any suggestions or past history you might have had or heard about. THX.}