Sierra 18-3536 Thermostat, 143 Degree F, Replaces Mercury Marine 833072

The Sierra 18-3536 is a marine engine thermostat built for Mercury marine applications. It regulates engine coolant flow to maintain proper operating temperature, opening at a rated 143 degrees F (62 degrees C) to help the engine reach and hold optimal temperature for efficient combustion and long-term reliability. Consistent, accurate thermostat operation protects against overheating and against running too cool, both of which can reduce engine efficiency and accelerate wear.

This thermostat is a direct interchange for the original Mercury Marine part, so it installs using the same mounting configuration as the OEM unit it replaces. Sierra manufactures marine replacement parts to meet or exceed the specifications of the original equipment they replace, making the 18-3536 a straightforward swap when a Mercury thermostat has failed or is due for routine replacement.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3536
• Temperature Rating: 143 degrees F (62 degrees C)
• Color: White
• Weight: 0.06 pounds
• UPC: 808282241230

Fitment

Designed for use in Mercury marine applications.

Replaces (OEM)

• Mercury Marine 833072
• Mercury Marine 833072003

Frequently Asked Questions

What temperature does the Sierra 18-3536 thermostat open at? The Sierra 18-3536 is rated to open at 143 degrees F (62 degrees C), which is the temperature at which it begins allowing coolant to flow through the engine.

What does the Sierra 18-3536 replace? It is a direct interchange for Mercury Marine part numbers 833072 and 833072003.

Is the Sierra 18-3536 an OEM or aftermarket part? It is an aftermarket replacement manufactured by Sierra to meet or exceed the specifications of the original Mercury Marine thermostat it replaces.

What color is the Sierra 18-3536 thermostat? The Sierra 18-3536 thermostat is white.

How much does the Sierra 18-3536 thermostat weigh? This thermostat weighs 0.06 pounds.

What engine applications is the Sierra 18-3536 designed for? Sierra designed the 18-3536 thermostat for use in Mercury marine applications.

Does the Sierra 18-3536 come with a gasket or other components? The listing for the Sierra 18-3536 includes the thermostat itself; no additional components are specified.

How do I know if my Mercury thermostat needs replacing? Signs like engine overheating, slow warm-up, or erratic temperature gauge readings often indicate a failed thermostat; if your Mercury engine used part 833072 or 833072003, the Sierra 18-3536 is a direct replacement.

What is the UPC for the Sierra 18-3536 thermostat? The UPC for the Sierra 18-3536 thermostat is 808282241230.

Can I use the Sierra 18-3536 on any marine engine? The Sierra 18-3536 is designed specifically for Mercury marine applications that originally used thermostat 833072 or 833072003.