882570 Mercruiser Harness Assembly | Genuine Used Part

🔧 Product Description

Genuine Mercury MerCruiser 1.7L Diesel Engine Harness - Part Number: 84-882570

A genuine used Mercury MerCruiser engine wiring harness for the 1.7L 120HP turbo-diesel marine engine.

The loom connects the engine instruments, starter, charging system, glow-plug system, sensors and control circuits to the boat-side electrical harness. It is used on the Isuzu-derived MerCruiser and Cummins MerCruiser Diesel 1.7L engine platform.

⚙️ Key Features

• Genuine Mercury MerCruiser engine harness
• Correct Mercury part number 84-882570
• Used on the 1.7L 120HP marine diesel engine
• Factory engine-side plugs and component branches
• Suitable for sterndrive and corresponding inboard installations where specified

🚤 Compatibility

Commonly used on

• Mercury MerCruiser D1.7L DTI diesel engines
• Cummins MerCruiser Diesel 1.7L 120 engines
• Alpha sterndrive diesel installations

Typically suits

• Engine models:
• MerCruiser D1.7L DTI
• MerCruiser 1.7L / 120HP diesel
• Cummins MerCruiser Diesel 1.7 MI 120
• MerCruiser 1.7L inline-four Alpha sterndrive installations
• Corresponding 1.7L inboard applications using harness 84-882570
• HP Range: 120HP
• Engine Type: Isuzu-derived 1.7L inline four-cylinder turbocharged marine diesel
• Drive Type: Alpha sterndrive and specified inboard configurations
• Year Range: Approximately early to mid-2000s

🔌 Function

The harness carries power and control signals between the engine, starter, alternator, glow-plug system, sensors, instruments and vessel controls.

⚠️ Common Signs of Failure

• Engine will not crank or start
• Glow-plug or charging circuits fail
• Gauges or warning alarms operate intermittently
• Sensor faults appear without a failed sensor
• Harness plugs or insulation are heat damaged or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 84-882570 established Mercury MerCruiser engine-wiring reference

OEM / Related Numbers

• 84-882570
• 882570
• 84882570
• 863782A1 related tachometer lead harness
• 884833A2 related tachometer module
• 891799 related inboard transmission harness
• 882748 related harness clip
• 882749 related harness clip
• 882750 related harness clip
• 883864 related harness retainer

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated