79-859674A1 Mercury 6000RPM Tacho | Genuine Used Part

🔧 Product Description

Genuine Mercury Quicksilver Flagship 0-6000 RPM Tachometer - Part Number: 79-859674A1

A genuine used Mercury Quicksilver Flagship analog tachometer with a 0-6000 RPM scale for compatible Mercury, Mariner and MerCruiser petrol engines.

The gauge displays engine speed from an ignition or alternator pulse signal. Its rear selector must be set to the correct engine pole or pulse configuration before use.

⚙️ Key Features

• Genuine Mercury Quicksilver OEM Flagship tachometer
• Correct Mercury part number 79-859674A1
• 0-6000 RPM scale
• Black face with blue graduations and black bezel
• Direct member of the 825731A1 / 859674A1 / 895283A03 family

🚤 Compatibility

Commonly used on

• Mercury and Mariner conventional analog outboard tachometer systems
• MerCruiser petrol sterndrive and inboard ignition systems

Typically suits

• Engine models:
• Mercury and Mariner two-stroke outboards with a compatible stator or alternator tachometer pulse
• Mercury and Mariner four-stroke outboards with a compatible analog tachometer output
• MerCruiser 4-cylinder, V6 and V8 petrol engines with a conventional tachometer terminal
• Marine petrol engines operating within a 0-6000 RPM instrument range
• HP Range: Not restricted by horsepower; pulse setting and RPM range controlled
• Engine Type: Mercury / Mariner outboard and MerCruiser petrol marine engine
• Year Range: Approximately 1994 onward

🔌 Function

The tachometer converts ignition or charging-system pulse frequency into an engine-speed reading. It allows the operator to monitor idle speed, cruising RPM and wide-open-throttle operating range.

⚠️ Common Signs of Failure

• Tachometer remains at zero
• RPM reading is doubled, halved or otherwise incorrect
• Needle fluctuates with charging-system faults
• Intermittent signal caused by corroded terminals or poor ground
• Gauge illumination or needle mechanism fails

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 79-895283A03 → Supersedes 79-859674A1
• 79-859674A1 → Supersedes 79-825731A1
• 79-825731A1 earlier OEM tachometer reference

OEM / Related Numbers

• 79-859674A1
• 859674A1
• 79859674A1
• 79-825731A1
• 825731A1
• 79-895283A03
• 895283A03
• 745061034747

Aftermarket / Verified Equivalents

• Sierra: 62724P - Premier Pro 0-6000 RPM tachometer
• Stewart-Warner: 82181 - 0-8000 RPM functional alternative

📦 Condition

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