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