MerCruiser 45-55757A1 Sterndrive Driveshaft Pre-Alpha Lower Unit Gearcase 70-82 Internal Engine Parts May need to run a

May need to run a hone through it

Width: 4 1/8"

but probably should be replaced but are probably usable

MerCruiser TR / TRS Bell Housing 1977-1993

32-54570 Thermostat Housing To water Pump

MerCruiser 45-55757A1 Sterndrive Driveshaft Pre-Alpha Lower Unit Gearcase 70-82 Internal Engine Parts May need to run aItem Details MerCruiser Lower Unit Drive Shaft 45 55757A1 45 49139A1 used in all MR Pre Alpha lower units 1970 1982 <<< Please make sure that the one you are replacing has a pre load pin**** Normal wear, overall good condition. Bearings might be ok on this carrier but I would recommend replacing them if you are installing this item. Replacing the bearings is always highly recommended. I didn't inspect them closely, so replacing them is completely up