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

🚤 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 Failure

• 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

🛠️ Service Notes

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

🔄 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

📦 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