Description

Sierra’s 18-43015 Thermostat replaces O.E. Part Numbers 864493 and 9-43015. It is designed for use in Mercruiser MCM 4.3L MPI, 5.0L MPI, and MX 6.2L I/O engines with dry joint exhaust and closed cooling. Includes one Sierra 18-1508 Thermostat Seal. Check manufacturer recommendations to ensure a proper fit before purchasing. Built with marine grade materials.
Replaces O.E. Part Numbers 864493 and 9-43015
Designed for use in Mercruiser MCM 4.3L MPI, 5.0L MPI, and MX 6.2L I/O engines with dry joint exhaust and closed cooling
Includes one Sierra 18-1508 Thermostat Seal
Check manufacturer recommendations to ensure a proper fit before purchasing
Built with marine grade materials