• 859678A1 895285A04 Mercury Speedometer | Genuine Used Part
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859678A1 895285A04 Mercury Speedometer | Genuine Used Part

859678A1 895285A04 Mercury Speedometer | Genuine Used Part

$50.00 AUD
$50.00 AUD
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🔧 Product Description

Genuine Mercury Quicksilver Flagship 10-80 MPH Speedometer - Part Number: 79-859678A1

A genuine used Mercury Quicksilver Flagship pitot speedometer with a 10-80 MPH scale for higher-speed marine applications.

The black-face instrument uses water pressure from a compatible pitot pickup to display vessel speed and does not require an electronic speed sensor.

⚙️ Key Features

  • Genuine Mercury Quicksilver OEM Flagship speedometer
  • Correct Mercury part number 79-859678A1
  • 10-80 MPH speed range
  • Black face, blue graduations and black bezel
  • Complete 825285A1 / 827875A1 / 859678A1 / 895285A04 family

🚤 Compatibility

Commonly used on

  • Mercury Flagship-series high-speed boat dashboards
  • Pitot-pressure systems using a compatible transom or gearcase pickup

Typically suits

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

🔌 Function

The speedometer converts water pressure created at the pitot pickup into an indicated MPH reading. A clear pickup, correctly routed hose and airtight fittings are required for accurate operation.

⚠️ Common Signs of Failure

  • Gauge does not register speed
  • Pitot pickup or lower-unit passage is blocked
  • Pressure hose leaks, kinks or disconnects
  • Reading fluctuates because of air or water trapped in the line
  • Internal diaphragm or needle mechanism fails

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 79-895285A04 → Supersedes 79-859678A1
  • 79-859678A1 → Supersedes 79-827875A1
  • 79-827875A1 → Supersedes 79-825285A1
  • 79-825285A1 earlier OEM 80 MPH speedometer reference

OEM / Related Numbers

  • 79-859678A1
  • 859678A1
  • 79859678A1
  • 79-827875A1
  • 827875A1
  • 79-825285A1
  • 79-895285A04
  • 895285A04

Aftermarket / Verified Equivalents

  • Sierra: 63076P - 20-80 MPH pitot speedometer
  • Sierra: 62723P - Premier Pro 20-80 MPH pitot speedometer

📦 Condition

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

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in the condition you received it for a refund or exchange. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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