i have got a mercury blueband 50hp outboard could any1 tell me wot year it is the serial number is 4414514 also i need 2 get a part think it is call the prop hub washer iv found these on the net but to make sure im gettin the rite 1 i need the number from the part as i have not got the 1 that was in it before hand any help would be appriciated many thanks ..........dave