# 6413A1 Mercury Bearing Housing | Genuine Used Part

## 🔧 Product Description

**Genuine Mercury Upper Crankshaft Bearing Housing Assembly - Part Number: 6413A1**

A genuine Mercury upper crankshaft bearing housing and powerhead end-cap assembly for selected 7.5HP and 9.8HP two-cylinder outboards.

The housing supports and locates the upper crankshaft bearing while retaining the associated oil seal, O-ring and bearing components at the top of the crankcase.

The casting and assembly may also be identified by the formatted Mercury number 1164-6413A1.

## ⚙️ Key Features

-   Genuine Mercury OEM upper bearing housing
-   Correct assembly part number 6413A1
-   Formatted Mercury reference 1164-6413A1
-   Replaces earlier bearing housings 6110A1 and 5279A1
-   Used on selected 7.5HP and 9.8HP twin-cylinder outboards

## 🚤 Compatibility

### Commonly used on

-   Mercury and Mariner twin-cylinder powerhead upper-bearing assemblies
-   7.5HP and 9.8HP crankcase end-cap applications

### Typically suits

-   Engine models:
-   Mercury 7.5HP two-cylinder outboard
-   Mariner 7.5HP two-cylinder outboard
-   Mercury 9.8HP two-cylinder outboard
-   Mariner 9.8HP two-cylinder outboard
-   Mercury 9.8HP - serial 9165303 to 9217755
-   Mercury 9.8HP - serial 9217756 and above
-   Powerheads previously using bearing housing 5279A1 or 6110A1
-   HP Range: 7.5HP - 9.8HP
-   Engine Type: Mercury / Mariner twin-cylinder carburetted two-stroke outboard
-   Year Range: Approximately late 1960s - mid-1980s

## 🔌 Function

The housing locates the upper crankshaft bearing, controls crankshaft alignment and seals the upper end of the crankcase.

## ⚠️ Common Signs of Failure

-   Bearing bore worn or loose
-   Housing cracked around the mounting holes
-   Upper crankshaft oil leakage
-   Excessive crankshaft movement or vibration
-   Corrosion around the seal or bearing seat

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   6413A1 → Supersedes 6110A1
-   6413A1 → Also replaces 5279A1
-   6110A1 and 5279A1 earlier upper-bearing housing references

### OEM / Related Numbers

-   6413A1
-   1164-6413A1
-   11646413A1
-   6110A1
-   5279A1
-   30-72961 related upper crankshaft bearing
-   30-20861 earlier bearing reference
-   31-31410 related bearing roller
-   26-66301 related upper oil seal
-   25-20863 related housing O-ring
-   15-31412A1 related bearing shim set

### Aftermarket / Verified Equivalents

-   No aftermarket equivalent

## 📦 Condition

-   Genuine used part
-   Removed from running engine where applicable
-   In good working condition unless otherwise stated

## Details

- **Price:** 70.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Type:** Bearings & Bushings
- **Tags:** Sawley’s AAM Used Parts – Crankshafts & Pistons | Engine Bottom End Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 70.00 AUD | In stock |

## Images

- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part
- 6413A1 Mercury Bearing Housing | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6413a1-mercury-bearing-housing-genuine-used-part)
> Updated: 2026-09-05