GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
You're FWC, therefore you do not need a marine pump, it is not pumping raw water, it is pumping anti-freeze. You should be OK with an automotive one. Regarding your starter, I would just take it to a shop and get it rebuilt. It is much cheaper than a new one.