Mercury 42996 Poppet Valve Spring

Mercury 42996 Poppet Valve Spring

Mercury 42996 is a genuine Mercury poppet valve spring used in compatible Mercury, Mariner, Verado, and MerCruiser cooling system assemblies where this exact part number is specified by the factory parts diagram.

Key Features

• Genuine Mercury replacement poppet valve spring
• Used in compatible cooling system pressure relief / poppet valve assemblies
• Works with the poppet valve assembly to help regulate cooling system pressure
• Direct replacement when Mercury part number 42996 is called out
• Designed for exact part-number matching during cooling system service

Fitment / Product Details

• Brand: Mercury
• Part Number: 42996
• Product: Poppet Valve Spring
• System: Cooling / Poppet Valve

Poppet valve spring fitment depends on engine model, serial number, cooling system layout, and the exact poppet valve assembly being serviced. Verify fitment with your Mercury, Mariner, Verado, or MerCruiser serial number and factory parts diagram before ordering.

What’s Included

• Mercury 42996 poppet valve spring

Poppet valve, diaphragm, cover, gaskets, seals, bolts, thermostats, and related cooling system parts are not included unless listed separately.

Why You Should Buy

The poppet valve spring is part of the cooling system pressure relief circuit. A worn, weak, or incorrect spring can affect cooling pressure control and water flow. Use the correct Mercury spring for the exact engine and parts diagram being serviced.

Common Applications

Used on compatible Mercury, Mariner, Verado, and MerCruiser cooling system assemblies where the factory parts listing calls for poppet valve spring 42996.

FAQ

Is this the complete poppet valve kit?

No. This listing is for the poppet valve spring only.

Does this include the diaphragm?

No. The poppet diaphragm and other cooling system components are sold separately unless specifically listed.

Can Wakeboss help confirm fitment?

Yes. Send your engine model and serial number through Ask a Parts Pro and we can help check the correct cooling system diagram.