Sierra 18-2733 Water Shutter, Replaces 92802 and 99370A2, Package of 2

The Sierra 18-2733 is a marine water shutter designed for stern drive cooling systems, sold as a package of 2. Water shutters regulate raw water flow through the exhaust and cooling passages, helping maintain proper engine operating temperature and preventing exhaust water from backing up into the engine when it is not running. This part is built to meet or exceed the specifications of the original equipment it replaces, making it a direct, reliable substitute for worn or failed shutters.

Measuring 3.175 inches in length and 2.5 inches in width, the 18-2733 is manufactured under the Sierra brand for durability in continuous exposure to raw water and marine exhaust conditions. It replaces OEM numbers 92802 and 99370A2, so it fits applications originally equipped with either of those parts. Because it ships as a package of 2 and is priced per package, buyers replacing shutters in pairs can source both from a single part number.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2733
• Length: 3.175 inches
• Width: 2.5 inches
• Weight: 0.14 pounds
• Package Quantity: 2 (priced per package)
• UPC: 808282124670

Fitment

• Fits applications originally equipped with OEM water shutter 92802 or 99370A2

Replaces (OEM)

• 92802
• 99370A2

Frequently Asked Questions

What does the Sierra 18-2733 water shutter do? It regulates raw water flow through a stern drive's cooling and exhaust passages, helping the engine reach and hold proper operating temperature and limiting water backing up into the exhaust when the engine is off.

How many shutters come in a package of the 18-2733? The 18-2733 is sold as a package of 2 and is priced per package, not per individual shutter.

What OEM part numbers does the Sierra 18-2733 replace? It replaces OEM numbers 92802 and 99370A2, so either of those part numbers can be cross-referenced to the 18-2733.

What are the dimensions of the 18-2733 water shutter? It measures 3.175 inches in length and 2.5 inches in width.

How much does the Sierra 18-2733 weigh? Each package weighs 0.14 pounds.

Is the Sierra 18-2733 an OEM part or an aftermarket replacement? The 18-2733 is a Sierra-brand replacement part engineered to meet or exceed the specifications of the original equipment water shutter it replaces (92802 or 99370A2).

Will the 18-2733 fit any boat with a water shutter? It is a direct replacement only for applications that originally used OEM water shutter 92802 or 99370A2; confirm your original part number before ordering.

What is included when I order the Sierra 18-2733? One package containing 2 water shutters (Sierra part number 18-2733) is included.

What is the UPC for the Sierra 18-2733 water shutter? The UPC is 808282124670.

Can I order a single water shutter instead of a pair? No, the Sierra 18-2733 is packaged and priced as a set of 2 shutters.