OKAY, BEAR WITH ME HERE. OUR CONTROL BOX SIEZED UP ON OUR MERCURY OUTBOARD AND WOULD NO LONGER GO INTO REVERSE. WE TOOK IT TO A REPAIR SHOP AND THE GUY SAID HE COULD NO LONGER GET PARTS OR ANYTHING TO FIX THE ONE WE HAVE. I NEED TO KNOW FROM ALL YOU EXPERTS WHAT WE SHOULD DO. I HAVE LOOKED FOR...