# 1826953 Mercury MerCruiser Cotter Pin | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Cotter Pin - Part Number: 18-26953

  

Genuine Quicksilver cotter pin used on Mercury / Mariner outboard and MerCruiser assemblies where the serial-numbered parts diagram specifies 18-26953. This pin is used to retain castellated nuts, clevis pins, linkage pins or service hardware and should be replaced whenever removed.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM cotter pin

• Correct Mercury part number 18-26953

• Listing reference: 1826953

• Used as a retainer / locking pin

• Direct replacement for Mercury / MerCruiser hardware locations using 18-26953

• Recommended replacement during service rather than reusing bent pins

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 18-26953 current OEM cotter pin reference

• 26953 short-form Mercury reference

  

OEM / Related Numbers:

  

• 18-26953

• 26953

• 1826953

• Cotter pin

• Split pin

• Retaining pin

• Linkage cotter pin

• Propeller / steering / linkage hardware retainer where specified

  

Aftermarket / Verified Equivalents:

  

• Marine-grade stainless cotter pin equivalents where size, length and material match

• Use OEM or exact-size stainless cotter pins for propeller, steering and shift linkage retaining points

• Do not reuse old cotter pins after removal

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner outboard linkage and hardware assemblies

• MerCruiser sterndrive linkage, steering or retaining hardware

• Propeller, trim, steering, throttle or shift hardware where 18-26953 is specified

  

Typically suits:

  

• Engine / drive models:

• Mercury outboard assemblies where cotter pin 18-26953 is shown in the parts diagram

• Mercury / Mariner shift and throttle linkage hardware using 18-26953

• Mercury / Mariner propeller or gearcase retaining hardware where specified

• MerCruiser Alpha drive and transom assemblies where cotter pin 18-26953 is listed

• MerCruiser Bravo drive and transom assemblies where specified

• Mercury / MerCruiser service assemblies requiring cotter pin 18-26953 by part number

  

• Engine / Drive Type: Mercury / Mariner outboard and MerCruiser applications by diagram

• System Type: Retaining pin / locking hardware

• Fitment Note: Match by pin diameter and length before installation.

  

🔌 Function

  

The cotter pin locks a nut, clevis pin or linkage pin in place so the retained hardware cannot loosen during operation.

  

Common signs of failure:

  

• Cotter pin missing or broken

• Pin corroded or weakened

• Pin removed during service and cannot be safely reused

• Retained nut or linkage pin loose

• Incorrect mild-steel pin fitted previously

• Hardware service requiring new retaining pin

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 11.5 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.50 AUD | In stock |

## Images

- 1826953 Mercury MerCruiser Cotter Pin | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1826953-mercury-mercruiser-cotter-pin-genuine-quicksilver-oem-part)
> Updated: 2026-07-18