Mercury Mariner M8 Mounting Stud – 16-424632

The Mercury MerCruiser Quicksilver 16-424632 is a genuine Mercury Marine OEM metric mounting stud used as diagram-specific bracket and component hardware on select Mercury and Mariner outboard applications. This M8 stud is commonly associated with fuel-system brackets, remote oil reservoir mounting, and auxiliary engine bracket locations where the factory parts diagram calls for 424632 / 16-424632. It is intended for use in Mercury outboard assemblies that require the correct OEM stud length, thread size, and hardware fit.

Key Features

• Genuine Mercury Marine factory OEM mounting stud.
• Mercury/MerCruiser part number: 16-424632.
• Manufacturer part number: 424632.
• Metric M8 mounting stud.
• Overall length: 37.1 mm, approximately 1.46 in.
• GTIN/UPC: 745061147874.
• Listed weight: 0.03 lb.
• Used in select Mercury/Mariner outboard bracket, fuel-system, oil-reservoir, and engine-mounted hardware locations where specified by diagram.

Application Compatibility

Common where-used application groups include select Mercury and Mariner outboards by serial number and diagram location, including:

• 10 HP Marathon applications where specified
• 40 Jet 3-cylinder applications where specified
• 45 Jet applications where specified
• 55 HP and 60 HP 3-cylinder 2-stroke applications where specified
• Select mid-range Mercury/Mariner fuel-system, remote oil reservoir, and auxiliary bracket assemblies

Use this stud only where the Mercury parts diagram specifically calls for 16-424632 / 424632.

Fitment Notice

Confirm fitment by engine serial number, bracket assembly, and exact diagram location before ordering. Mercury uses similar M8 studs and bolts in multiple outboard assemblies, and overall length, thread engagement, and hardware position must match the factory parts diagram.

When This Part Needs Replacement

Replace this stud if the original hardware is missing, snapped, corroded, cross-threaded, stretched, or damaged during bracket or component service. A damaged mounting stud can prevent proper clamp load and may cause brackets, fuel-system components, or reservoir mounts to loosen under vibration.

Installation Notes

Install this stud only in the factory location that calls for 16-424632 / 424632. Inspect the mating threads, bracket holes, washers, locknuts, isolators, and nearby hardware while the assembly is apart. Do not force a damaged or corroded stud into the engine casting or bracket. Follow the Mercury service manual for the correct installation method and torque specification for the specific engine model.

Alternate/Superseded Part Numbers

• 16-424632 Mercury/MerCruiser formatted part number
• 424632 Manufacturer part number
• 42463 earlier Mercury reference to verify by serial number and diagram
• 424631 earlier Mercury reference to verify by serial number and diagram

Parts Desk Insight

This type of hardware should be matched by part number rather than by thread size alone. Similar M8 fasteners can vary in length, shoulder style, and installed position, which matters when securing fuel brackets, oil reservoir brackets, and other engine-mounted components in a high-vibration outboard environment.

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