Quicksilver 34270 Expansion Plug 1.625 Inch

The Quicksilver 34270 is a 1.625-inch expansion plug designed for Mercury and MerCruiser marine engines. Also known as a freeze plug or core plug, this component seals casting holes in the engine block or cylinder head left from the manufacturing process.

Key Features:

• 1.625-inch diameter for precise fitment
• Genuine Quicksilver OEM quality for Mercury marine engines
• Corrosion-resistant construction for marine environments
• Seals engine block casting holes to prevent coolant leaks
• Direct replacement part for worn or corroded expansion plugs

Expansion plugs are critical for maintaining proper engine cooling system integrity. Over time, these plugs can corrode or fail, especially in marine applications where exposure to moisture is constant. Replacing damaged expansion plugs prevents coolant loss and potential engine overheating.