Prime Guard QUIK8M0058389 Gearcase Screw Mercury Marine OEM Replacement 8M0058389

The Prime Guard QUIK8M0058389 is a direct-fit replacement gearcase screw designed to meet the specifications of the original Mercury Marine OEM part number 8M0058389. This hardware fastener is used to secure the gearcase (lower unit) assembly on compatible Mercury and Mariner outboard motors, providing a reliable seal and structural connection between the gearcase and the exhaust housing.

Manufactured to OEM specifications, this screw ensures proper torque retention and corrosion resistance in demanding marine environments. Using the correct factory-spec replacement fastener helps maintain gearcase integrity, prevents water intrusion, and avoids the stripped threads or fitment issues that can result from using incorrect hardware.

Key Features:

• Direct OEM replacement for Mercury Marine part number 8M0058389
• Designed for gearcase (lower unit) assembly applications
• Built to withstand harsh saltwater and freshwater marine environments
• Manufactured to original equipment specifications for proper fit and torque retention
• Supplied by Prime Guard, a trusted aftermarket marine hardware supplier

Ideal for technicians and DIY boaters performing lower unit service, gearcase removal, or routine maintenance on Mercury and Mariner outboard motors. Always refer to your engine's service manual for proper torque specifications during installation.