Sierra Check Valve Assembly 18-99546, Cross Reference 551-33cv, for Marine Oil Change Pumps

The Sierra 18-99546 Check Valve Assembly is a replacement check valve built for marine oil change pumps, the type used to extract used engine oil from a boat's crankcase during routine oil changes. The check valve is the internal component that allows oil to flow in one direction through the pump while preventing backflow, so the pump can draw oil out of the engine efficiently on each stroke or cycle. A worn or cracked check valve is a common cause of a marine oil change pump losing suction or failing to draw oil at all, and replacing the valve assembly restores proper pump function without having to replace the entire pump. This assembly is sold as a single complete unit, so installation is a straightforward swap of the worn valve for a new one. It is cross-referenced to the CDI Electronics 551-33cv, making it a suitable replacement for pumps that originally used that part. Boat owners performing their own annual oil changes, or servicing a pump that has started losing prime, can use this valve assembly to get their existing oil change pump back into working order rather than purchasing a new pump outright.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99546
• Product Name: Check Valve Assembly
• Category: Marine Oil Change Pumps
• Weight: 0.3 pounds
• UPC: 736983856203
• Unit Count: 1
• Cross Reference: 551-33cv (CDI Electronics)

Replaces (OEM)

• 551-33cv

Frequently Asked Questions

What is the Sierra 18-99546 Check Valve Assembly used for? It is a check valve assembly for marine oil change pumps, controlling one-way oil flow so the pump can draw used oil out of an engine's crankcase during an oil change.

Is the Sierra 18-99546 compatible with CDI Electronics 551-33cv pumps? Yes, the 18-99546 is cross-referenced to the CDI Electronics 551-33cv, so it can be used as a replacement valve assembly on pumps that call for that part.

How much does the 18-99546 check valve assembly weigh? The Sierra 18-99546 Check Valve Assembly weighs 0.3 pounds.

How many check valves come in one 18-99546 package? One complete check valve assembly is included per unit, ready to install as a direct replacement.

Why would my marine oil change pump lose suction? A worn or cracked check valve, like the one replaced by the Sierra 18-99546, is a common cause of an oil change pump losing suction or failing to draw oil.

Can I replace just the check valve instead of the whole oil change pump? Yes, the Sierra 18-99546 Check Valve Assembly lets you replace the failed valve component on its own rather than buying an entirely new oil change pump.

Is the Sierra 18-99546 an OEM part or aftermarket? The 18-99546 is a Sierra-branded replacement part cross-referenced to the CDI Electronics 551-33cv, sold as an aftermarket equivalent for that valve.

What is the UPC for the Sierra 18-99546 Check Valve Assembly? The UPC for the Sierra 18-99546 Check Valve Assembly is 736983856203.

Does the 18-99546 check valve require any special tools to install? The 18-99546 is a complete valve assembly designed as a direct swap for the existing check valve in a compatible oil change pump.

What category of marine equipment does the 18-99546 belong to? The Sierra 18-99546 Check Valve Assembly is listed under marine oil change pumps and their replacement components.