859676A1 Mercury Speedometer | Genuine Used Part

🔧 Product Description

Genuine Mercury Quicksilver Flagship 10-45 MPH Speedometer - Part Number: 79-859676A1

A genuine used Mercury Quicksilver Flagship pitot speedometer with a 10-45 MPH scale.

The black-face instrument displays vessel speed from water pressure supplied by a compatible pitot pickup and pressure hose.

⚙️ Key Features

• Genuine Mercury Quicksilver OEM Flagship speedometer
• Correct Mercury part number 79-859676A1
• 10-45 MPH speed range
• Black face, blue graduations and black bezel
• Complete 825283A1 / 827873A1 / 859676A1 / 895285A01 family

🚤 Compatibility

Commonly used on

• Mercury Flagship-series boat dashboards
• Pitot-pressure speed systems on lower-speed recreational boats

Typically suits

• Engine models:
• Mercury and Mariner outboard-powered boats with a transom pitot pickup
• MerCruiser sterndrive boats using a compatible gearcase pitot pickup
• Inboard boats fitted with an independent pitot pickup and pressure hose
• HP Range: Not engine-specific
• Engine Type: Outboard, sterndrive or inboard boat with pitot-pressure speed system
• Year Range: Approximately 1990s - 2000s

🔌 Function

The gauge converts pitot water pressure into an indicated boat speed. It requires a clear pickup and leak-free pressure hose; electrical power is used only for instrument lighting.

⚠️ Common Signs of Failure

• Gauge remains at zero while underway
• Pitot pickup is blocked by debris
• Pressure hose is disconnected, kinked or split
• Reading is delayed because water or air is trapped in the hose
• Internal diaphragm or needle movement fails

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 79-895285A01 → Supersedes 79-859676A1
• 79-859676A1 → Supersedes 79-827873A1
• 79-827873A1 → Supersedes 79-825283A1
• 79-825283A1 earlier OEM 45 MPH speedometer reference

OEM / Related Numbers

• 79-859676A1
• 859676A1
• 79859676A1
• 79-827873A1
• 827873A1
• 79-825283A1
• 79-895285A01
• 895285A01

Aftermarket / Verified Equivalents

• Sierra: 61163P - 10-50 MPH pitot speedometer
• Veethree: 112340 - Lido Pro 50 MPH speedometer kit

📦 Condition

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