Description

Sierra’s 18-3638 Thermostat is designed for use with Mercury/Mariner 2.5 HP to 3.5 HP (s/n 0R131842 & Up) and 4 HP to 6 HP (s/n 0R411838 & Up) outboard engines. Includes one thermostat per package. It is interchangeable with Mercury Marine 804540. Each Sierra product meets or exceeds the original equipment part it replaces. Fit specific, check part numbers to ensure proper fit.
Designed for use with Mercury/Mariner 2.5 HP to 3.5 HP (s/n 0R131842 & Up) and 4 HP to 6 HP (s/n 0R411838 & Up) outboard engines
Includes one thermostat per package
Interchangeable with Mercury Marine 804540
Each Sierra product meets or exceeds the original equipment part it replaces
Fit specific, check part numbers to ensure proper fit