I recently purchased a Mariner 9.9M outboard engine. The plate says 9.9M 682C 335036. After getting the run around at a large chain I've found out that the 682C is a serial number code but I have not been able to find out what year the serial number is. I'm trying to order the linkage from the manual choke knob/button to the carb...any help would be greatly appreciated. Thx Mark