882539 Mercruiser Flywheel | Genuine Used Part

🔧 Product Description

Genuine MerCruiser 1.7L Isuzu Diesel Flywheel Assembly - Part Number: 882539

A genuine used flywheel for MerCruiser and Cummins MerCruiser 1.7L inline four-cylinder diesel engines.

The flywheel mounts to the rear of the crankshaft and carries ring gear 882363. It provides starter engagement, rotating inertia and the mounting interface for the engine coupler or marine transmission drive system.

⚙️ Key Features

• Genuine MerCruiser diesel flywheel

• Correct Mercury reference 882539

• Used with flywheel ring gear 882363

• Designed for the Isuzu-based 1.7L engine

• Suits sterndrive and inboard diesel configurations

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 882539 Mercury 1.7L diesel flywheel reference

OEM / Related Numbers:

• 882539

• Flywheel ring gear: 882363

• Engine coupler: 861839A3 on applicable sterndrive installations

• Crankshaft and flywheel mounting bolts from the 1.7L engine assembly

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• MerCruiser D1.7L DTI sterndrive engines

• Cummins MerCruiser CMD 1.7 MI inboard engines

• Isuzu-based 1.7L marine diesels

Typically suits:

• Engine models:

• MerCruiser D1.7L DTI - serial 0M055000 through 0M999999

• Cummins MerCruiser CMD 1.7 MI 120 - serial 88109041 and up

• MerCruiser 1.7 MS 120

• MerCruiser 1.7 MI 120

• HP Range: Approximately 120HP

• Engine Type: 1.7L inline four-cylinder turbo-diesel

• Year Range: Approximately late-1990s through mid-2000s

🔌 Function

The flywheel stores rotational energy, smooths combustion pulses, carries the starter ring gear and transfers crankshaft torque to the coupler or transmission.

Common signs of failure:

• Starter ring teeth are damaged

• Cracks around crankshaft mounting holes

• Excessive vibration or flywheel runout

• Coupler mounting points are worn

• Starter motor grinds during engagement

• Flywheel face is heat-damaged

• Corrosion around the crankshaft bore

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated