I have a 1990 Mariner 15ML serial number 684CL329821. I broke the cap on the lower casing, and was wondering whether their is a Yamaha part that would match up with the mercury part number. Mercury part number was 84076M, Cap...now it is 84076T, Cap. Any help would be appreciated. I have gotten other parts for the lower drive including Yamaha oil seals-93101-17054-00, but there are numerous Yamaha Caps that use these seals. Thanks-this is my backup motor, and it runs great, but $170 American is well over $200 Canadian, and funds are a little tight this time of year.