Description
Product Overview
The Mercury 14mm copper boat bolt is crafted from high‑purity copper, delivering exceptional corrosion resistance essential for marine environments. Engineered with a 14mm x 1.25mm thread, it matches the OEM part number 19220A4, ensuring a perfect vehicle‑specific fit for a wide range of watercraft engines. Weighing just 0.48 ounces, this lightweight yet robust fastener combines durability with ease of installation, making it a reliable replacement for original components.
Usage
Designed for watercraft engine assemblies, this bolt is ideal for marine technicians, boat owners, and DIY enthusiasts performing engine repairs or routine maintenance. It excels in saltwater conditions, providing a secure hold that resists loosening under vibration. Whether reinstalling a propeller shaft, securing a fuel pump, or tightening engine mounts, the Mercury copper bolt delivers consistent performance.

Why Choose Us
Mercury’s reputation for marine reliability backs every bolt we produce. Our copper alloy undergoes rigorous testing for tensile strength and corrosion resistance, guaranteeing longevity even in harsh saltwater exposure. Each bolt is inspected for exact thread dimensions and vehicle‑specific compatibility, reducing the risk of mismatched parts and ensuring a hassle‑free installation experience.
Key Features
- High‑purity copper construction for superior corrosion resistance
- Precise 14mm x 1.25mm thread matching OEM specifications
- Vehicle‑specific fit for a wide range of watercraft engines
- Lightweight design at only 0.48 ounces for easy handling
- Backed by Mercury’s marine engineering expertise and quality assurance
FAQ
Is this bolt compatible with all Mercury boat models?
The bolt is designed for vehicle‑specific fit and matches the OEM part number 19220A4. It is compatible with Mercury engines that use this specification, typically found in many mid‑size recreational boats.
Can I use this bolt in freshwater boats?
Yes, the copper material provides excellent corrosion resistance in both saltwater and freshwater environments, making it suitable for all marine applications.
What tools are needed for installation?
A standard 14mm socket or wrench and a torque wrench to achieve the manufacturer‑specified torque are sufficient for proper installation.
Does the bolt come with a warranty?
Mercury offers a limited warranty covering material defects for one year from the date of purchase, ensuring confidence in the product’s durability.
How does this bolt differ from steel alternatives?
Copper offers superior resistance to galvanic corrosion in marine settings, reducing the likelihood of rust and extending the service life compared to standard steel fasteners.






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