Industrial M45-858711 Driveshaft

This Industrial M45-858711 Driveshaft is an aftermarket replacement for Mercury MerCruiser stern-drive lower units, identified by the OEM numbers 45-858711 and 45-858712. The 45-858712 variant is the XL (extra-long) version, listed by Mercury Marine as Drive shaft-XL, with overall length of 42 inches, width 6 inches, height 1.50 inches, and an approximate weight of 7.61 pounds. In Mercury’s cataloging, 45-858712 is superseded by 881942, and the 45-858711 lineage is superseded by 881938, reflecting updated part numbers while maintaining compatibility for the same lower-unit family. This driveshaft is shown as a replacement option for a range of Mercury Marine engines and configurations that originally used these part numbers, including several 200- to 225-HP applications and related 3.0L V6 lower-unit setups. When selecting this replacement, verify you require the XL/X-long length variant and that the shaft length aligns with your specific Mercury MerCruiser lower unit to ensure proper fit and driveline alignment.