This came off a donor motor thats a 1980 40hp mercury serial number 5557376. it would be smart to put a new impeller in before installing on your motor. it comes with the prop nut and nut retainer and thrust washer. it will ship in a plywood and 2x2 constructed crate. it will ship with no oil in the lower unit and may have a sticker on it that is not pictured (inventory purposes). the shift cam does not come with it. if you wish to use local pickup send me a message and we can arrange it. the driveshaft is 11 splines and the prop shaft is 13 spline. if you have any questions please do not hesitate to send a message and ask.