882459 Mercruiser Upper Timing Cover | Genuine Used Part

🔧 Product Description

Genuine Used Cummins MerCruiser Diesel 1.7L Upper Timing Cover - Part Number: 882459

A genuine pre-owned Mercury Marine and Cummins MerCruiser Diesel upper timing cover for selected 1.7-litre inline four-cylinder marine diesel engines.

Mercury identifies 882459 as the upper timing cover. It encloses the upper timing-belt and camshaft-drive area, helping protect the belt, pulley and related timing components from loose objects and contamination.

⚙️ Key Features

• Genuine Mercury Marine used timing cover
• Correct OEM part number 882459
• Upper timing-cover configuration
• Designed for selected CMD 1.7-litre diesel engines
• Protects the timing belt and upper pulley area
• Obsolete OEM component suitable for restoration or repair

🚤 Compatibility

Commonly used on

• Cummins MerCruiser Diesel 1.7 MI 120 engines
• Cummins MerCruiser Diesel 1.7 MS 120 engines
• MerCruiser D1.7L DTI engines
• Inline four-cylinder compact marine diesel installations

Verified catalogue applications

• CMD 1.7 MI 120 I/L4 - serial number 88109041 and later
• CMD 1.7 MS 120 I/L4 - serial number 8810800 and later
• D1.7L DTI - serial number 0M055000 through 0M999999

Important fitment note

• Confirm the exact engine model and serial number.
• Upper and lower timing covers are separate components.
• Check the mounting-hole pattern, moulded clearances and inspection openings against the original.
• Fasteners, rubber grommets and lower cover are included only when shown or described.

🔌 Function

The cover shields the timing belt and upper camshaft-drive components.

It helps keep wiring, hoses, loose hardware and service tools away from the moving timing system.

⚠️ Common Signs of Failure

• Cracked mounting tabs
• Broken screw bosses
• Heat distortion
• Belt-contact marks inside the cover
• Oil contamination
• Cover rattles while the engine is running
• Missing fastening points
• Salt corrosion around metal inserts

🛠️ Service Notes

Recommended checks before installation

• Inspect all mounting points
• Check the inside for belt-contact marks
• Confirm the cover is not warped
• Inspect the timing belt, tensioner and pulleys while access is available
• Replace damaged fasteners and grommets
• Verify belt clearance before starting the engine

🔄 Supersession & Cross Reference

OEM Supersession Chain

• No verified superseding part number identified
• Mercury 882459 is listed as obsolete and no longer manufactured

OEM / Related Numbers

• 882459
• OEM Description: Cover, Timing, Upper
• Engine Family: Cummins MerCruiser Diesel 1.7L
• Related lower cover and mounting hardware vary by engine version

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine Mercury Marine used part
• Pre-owned diesel-engine cover
• Cosmetic marks, fading and light contamination may be present
• Inspect all mounting tabs before installation
• Included hardware is limited to what is shown or described
• Supplied in protective or equivalent packaging