Sierra Rubber Seal 18-2939, Replaces 814356, Fits Volvo Penta AQ200/250/270/275/280/290, Pack of 2

The Sierra 18-2939 is a rubber seal used at the water pump connection on select Volvo Penta AQ series sterndrive engines. It creates a watertight seal at the pickup/connection point in the raw water cooling circuit, helping prevent leaks and water intrusion that can lead to corrosion or reduced cooling performance. Made from rubber for flexibility and resistance to the marine water environment, this seal is a low-cost, high-frequency maintenance item that should be replaced any time the water pump connection is disassembled for service, or as part of routine cooling system maintenance. It is sold as a package of 2, so buyers have a spare on hand or enough for both connection points in a single service job. This seal directly replaces OEM part number 814356 and is designed to fit Volvo Penta AQ200, AQ250, AQ270, AQ275, AQ280, and AQ290 engines. Installing the correct rubber seal at this connection point is a simple but important step in keeping the raw water cooling system sealed and functioning properly, and using the Sierra 18-2939 ensures a fit and material equivalent to the original equipment part.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2939
• Product Name: Rubber Seal
• Application: Water Pump Connector
• Material: Rubber
• Package Quantity: 2
• Weight: 0.05 pounds
• Replaces (OEM): 814356

Fitment

• Volvo Penta AQ200
• Volvo Penta AQ250
• Volvo Penta AQ270
• Volvo Penta AQ275
• Volvo Penta AQ280
• Volvo Penta AQ290

Replaces (OEM)

• 814356

Frequently Asked Questions

What is the Sierra 18-2939 rubber seal used for? The Sierra 18-2939 is a rubber seal that fits at the water pump connection on Volvo Penta AQ series sterndrive engines, sealing the raw water cooling circuit at that connection point to prevent leaks.

Which Volvo Penta engines does the 18-2939 seal fit? This rubber seal is designed to fit Volvo Penta AQ200, AQ250, AQ270, AQ275, AQ280, and AQ290 engines.

Does the 18-2939 replace OEM part 814356? Yes, Sierra part number 18-2939 directly replaces OEM number 814356.

How many seals come in a package? The Sierra 18-2939 rubber seal is sold as a package of 2.

What material is the 18-2939 seal made from? It is made from rubber, chosen for its flexibility and ability to hold a watertight seal in the marine cooling environment.

How much does the 18-2939 rubber seal weigh? The package weighs 0.05 pounds.

When should this rubber seal be replaced? The 18-2939 should be replaced any time the water pump connection on a compatible Volvo Penta AQ engine is disassembled for service, or when the existing seal shows signs of hardening, cracking, or leaking.

Is the Sierra 18-2939 an OEM or aftermarket part? The 18-2939 is a Sierra aftermarket rubber seal manufactured to replace OEM part 814356 on the applicable Volvo Penta AQ engines.

What is included when ordering the 18-2939? Ordering the 18-2939 provides a package of 2 rubber seals for the water pump connection on compatible Volvo Penta AQ engines.

Will one 18-2939 package be enough for a full water pump connector service? Since the 18-2939 ships as a pack of 2, most single-engine water pump connector services on a Volvo Penta AQ200-AQ290 engine can be completed with one package.