# 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part

🔧 Product Description

  

Genuine Used Mercury Mariner Lower Crankshaft End Cap Assembly - Part Number: 858552T2

  

A genuine pre-owned Mercury and Mariner lower crankshaft end-cap assembly for selected inline four-cylinder 1.5-litre two-stroke outboards.

  

The complete Mercury service number is 858552T2. The prefix 1169 may appear in casting, catalogue or inventory references and identifies the end-cap component group.

  

The assembly supports and seals the lower end of the crankshaft, carries the lower crankshaft seal and helps maintain crankcase compression.

  

⚙️ Key Features

  

• Genuine Mercury or Mariner used end-cap assembly

• Correct service part number 858552T2

• Common listing reference 1169-858552T2

• Suitable for selected 75HP to 125HP two-stroke outboards

• Used on carburetted and compatible 1.5L DFI engines

• Pro Marine replacement assembly available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 1169-8997 - Earlier lower end-cap reference

• 1169-9004A3 - Earlier lower end-cap assembly

• 1169-9004T3 - Related earlier service reference

• 858552T2 - Current Mercury service end-cap assembly

  

OEM / Related Numbers:

  

• 858552T2

• 1169-858552T2

• 9004A3

• 1169-9004A3

• 9004T3

• 1169-9004T3

• 8997

• 1169-8997

• OEM Description: End Cap Assembly, Lower

  

Aftermarket / Verified Equivalents:

  

• Pro Marine lower end-cap assembly replacing 858552T2

• Pro Marine reference family: 858552

• Aftermarket lower end cap with seals for Mercury 1.5L four-cylinder engines

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury inline four-cylinder two-stroke outboards

• Mariner inline four-cylinder two-stroke outboards

• Carburetted 1.5-litre engine families

• Selected direct-fuel-injected 1.5-litre engines

  

Typically suits selected:

  

• 75HP

• 80HP

• 90HP

• 100HP

• 115HP

• 125HP

  

Selected DFI applications may include:

  

• 75HP DFI

• 90HP DFI

• 115HP DFI

  

• Engine Configuration: Inline four-cylinder two-stroke

• Engine Displacement: Approximately 1.5 litres

• Application Range: Serial-number controlled

  

Important fitment note:

  

• Confirm the engine serial number and original end-cap casting.

• Seal diameters and end-cap configurations changed during production.

• Inspect whether the supplied used assembly includes the crankshaft seals, bearing components, bolts and locating hardware.

• New crankshaft seals should normally be installed during powerhead assembly.

  

🔌 Function

  

The lower end cap locates the lower crankshaft bearing and seals the bottom of the crankcase.

  

It helps retain crankcase pressure, prevents fuel-and-oil mixture leakage and provides the sealing surface around the lower crankshaft journal.

  

Common signs of wear or damage:

  

• Oil or fuel residue around the lower crankcase

• Crankcase pressure leakage

• Lower crankshaft seal failure

• Corrosion in the seal bore

• Cracked or distorted end-cap casting

• Excessive bearing movement

• Damaged locating surfaces

• Scoring where the seal contacts the crankshaft

• Engine runs poorly after powerhead assembly

  

Recommended checks before installation:

  

• Confirm the casting and service numbers

• Inspect the seal bores for corrosion and scoring

• Check the bearing seat and locating surfaces

• Measure crankshaft movement

• Replace all crankshaft seals

• Inspect the mating crankcase surface

• Use the specified sealant and tightening sequence

• Pressure-test the assembled crankcase where practical

  

📦 Condition

  

• Genuine Mercury or Mariner used part

• Pre-owned powerhead component

• Cosmetic marks, oil residue and surface oxidation may be present

• Seals and bearings should be inspected or replaced before installation

• Included hardware is limited to what is shown or described

• Supplied in protective or equivalent packaging

## Details

- **Price:** 17.5 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Timing Components | Timing Chains Gears & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 17.50 AUD | In stock |

## Images

- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part
- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part
- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part
- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part
- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part
- 1169-858552T2 Mercury Lower End Cap Assembly | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1169-858552t2-mercury-lower-end-cap-assembly-genuine-used-part)
> Updated: 2026-07-12