Description

Mercury MerCruiser Quicksilver 12-20583 is a genuine Mercury Marine washer used across a wide range of Mercury, Mariner, MerCruiser, Bravo, transom, remote-control, and older outboard component assemblies. This is a small OEM hardware washer used where the Mercury parts diagram specifically calls for 12-20583 / 20583, helping support proper fastening, spacing, or load distribution at the listed assembly location. Mercury parts references list this as a genuine factory OEM washer with GTIN 745061130005.

Key Features

• Genuine Mercury Marine / Quicksilver washer reference
• Used in supported Mercury, Mariner, and MerCruiser assemblies
• OEM part number: 12-20583
• Base part reference: 20583
• GTIN / UPC reference: 745061130005
• Catalog package reference: approximately 4.50 in. x 3.00 in. x 0.10 in.
• Small hardware item best matched by exact parts diagram location

Engine Compatibility

This washer is shown across many Mercury and MerCruiser parts diagrams, including select older Mercury / Mariner outboards, Bravo sterndrives, Bravo One / Two / Three drives, Bravo XR / X drives, Blackhawk applications, integrated and high-performance transom assemblies, remote controls, and several older MerCruiser GM and Ford engine assemblies depending on diagram location and serial number range.

Serial Number Fitment Notice

Washer fitment depends on the exact engine, drive, transom assembly, control assembly, component group, and diagram position. Always confirm compatibility using the Mercury or MerCruiser serial number and the exact parts diagram before ordering, especially because this washer appears in many different assemblies.

When This Part Needs Replacement

Replace this washer if the original is missing, corroded, bent, distorted, worn, damaged during removal, or no longer sits flat against the mating hardware. Small hardware should also be replaced when it is part of a fastener stack that needs to clamp evenly.

Installation Notes

Confirm the washer’s exact position in the Mercury parts diagram before installation. Match it with the correct screw, bolt, nut, bracket, or linkage component for the assembly being serviced. Tighten the related hardware according to the Mercury service manual for the specific engine or drive application.

Alternate/Superseded Part Numbers

• 12-20583
• 20583
• Mercury Marine 20583
• Quicksilver 12-20583

Parts Desk Insight

This washer has a very wide application range, so the safest match is the diagram location, not the engine size or drive family alone. If the parts drawing calls for 12-20583, use that reference rather than trying to match a generic washer by appearance.

Shipping: Ships same or next day for fast Canada wide shipping.