Mercury Quicksilver E-Ring Retaining Clip 87843

Part Number: 87843 | Also listed as: 53-87843
Brand: Mercury / Quicksilver
Official Product Type: E-Ring / External Retaining Clip OEM Hardware
System: General Assembly Hardware (shafts, pins, linkage, and fuel-system assemblies)

A genuine OEM Mercury E-ring (external retaining ring) used to secure shafts, pins, and related components in their correct position within Mercury and MerCruiser assemblies. E-rings are small but critical they prevent axial movement of the retained component and must be replaced with the exact OEM specification to maintain proper assembly integrity.

Compatible Applications

Selected Mercury outboard assemblies including Verado and Mercury Racing fuel-system related components
Selected MerCruiser sterndrive assemblies
Confirm fitment by locating part number 87843 / 53-87843 in the Mercury parts diagram for your specific engine, model, and serial number

E-rings are position- and dimension-specific. Always verify this part number against the Mercury parts diagram for your assembly before ordering. Do not substitute based on visual similarity alone.

Part Details

Type: E-ring (external retaining ring / snap ring)
Material: Steel (OEM specification)
Function: Retains shafts, pins, or linkage components against axial movement
Diagram position: Confirm location in the Mercury parts diagram for the specific assembly being serviced

When to Replace

E-ring is bent, deformed, or no longer snaps securely into its groove
Corrosion or pitting has weakened the clip
Lost during disassembly always replace rather than reuse
Called out in the Mercury service manual as a replace-on-removal item

Installation Notes

Use the correct snap-ring pliers or E-ring installation tool do not use screwdrivers or improvised tools that can distort the ring.
Ensure the ring seats fully and evenly in its groove before reassembling adjacent components.
Inspect the groove for corrosion or damage before installing the new ring.
Always replace with the exact OEM part number E-rings that look similar can differ in diameter, thickness, and groove fit.

Parts Desk Insights

Best use case: This is the right part when 87843 / 53-87843 appears in the Mercury parts diagram for the assembly being serviced. It is commonly needed during fuel-system, linkage, or shaft-related service on Verado and MerCruiser applications where this specific clip is called out. Ordering by diagram part number is the safest approach.

Common mistakes: The most frequent error is assuming any E-ring of similar size will work. E-rings are dimension-critical a ring that is even slightly too large or too small will not retain properly and can cause component failure. Always order by the exact Mercury part number shown in the diagram, not by measurement alone. Also note that E-rings are inexpensive enough that they should always be replaced rather than reused during any service that requires removal.