Sierra 18-5961-9 Bronze Freeze Plug 1-5/8" Pack of 8 Mercruiser Stern Drive

The Sierra 18-5961-9 bronze freeze plug is an essential engine component designed specifically for Mercruiser stern drive applications. These freeze plugs, also known as expansion plugs or core plugs, protect your engine block from cracking due to freezing coolant expansion and seal the core holes left from the casting process.

Key Features:

• Durable bronze construction for superior corrosion resistance in marine environments
• 1-5/8" diameter size for precise fitment
• Convenient pack of 8 plugs for complete engine service or future replacements
• Direct replacement for Mercruiser stern drive engines
• OEM-quality manufacturing standards for reliable sealing and long service life

Bronze freeze plugs offer excellent durability compared to steel alternatives, making them ideal for marine applications where moisture and corrosion are constant concerns. This value pack ensures you have the right quantity for typical engine rebuilds or maintenance tasks, with extras on hand for future needs.