• 825734 895288A01 Mercury Water Gauge | Genuine Used Part
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825734 895288A01 Mercury Water Gauge | Genuine Used Part

825734 895288A01 Mercury Water Gauge | Genuine Used Part

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🔧 Product Description

Genuine Mercury Quicksilver Flagship 1-15 PSI Water Pressure Gauge - Part Number: 79-825734A1

A genuine used Mercury Quicksilver Flagship mechanical water-pressure gauge for compatible Mercury, Mariner and Force outboard cooling systems.

The gauge displays 1-15 PSI from a small pressure hose connected to the engine cooling-water circuit. The later complete-kit version includes approximately 25 feet / 7.6 metres of tubing and connection hardware.

⚙️ Key Features

  • Genuine Mercury Quicksilver OEM water-pressure gauge
  • Original Mercury part number 79-825734A1
  • 1-15 PSI mechanical pressure range
  • Black face, blue graduations and anti-fog lens
  • Complete five-number OEM supersession history

🚤 Compatibility

Commonly used on

  • Mercury and Mariner outboard mechanical water-pressure systems
  • Force outboards using the compatible 1-15 PSI cooling-water take-off

Typically suits

  • Engine models:
  • Mercury / Mariner 25 E and 25 EL - US serial 0C192155 and above
  • Mercury / Mariner 25 E and 25 EL - Belgium serial 9548742 and above
  • Mercury / Mariner 30HP through 125HP two-stroke outboards, excluding four-stroke models
  • Mercury V6 3.0L outboards produced through 1998 where the 1-15 PSI gauge is specified
  • Force 40HP and 50HP outboards using the compatible cooling-water pressure connection
  • HP Range: 25HP - 125HP where the 1-15 PSI system is specified
  • Engine Type: Mercury / Mariner two-stroke and Force outboard
  • Year Range: Approximately late 1980s - 1998, with serial-controlled applications

🔌 Function

The gauge receives cooling-water pressure through a small hose and displays the pressure produced by the water pump. It helps identify restrictions, impeller wear and loss of cooling-water flow while the engine is operating.

⚠️ Common Signs of Failure

  • Gauge remains at zero despite visible cooling-water flow
  • Blocked pressure hose or engine fitting prevents a reading
  • Needle fluctuates because air or debris is trapped in the hose
  • Split hose or loose fitting leaks water or pressure
  • Internal pressure movement sticks or fails

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 79-895288A01 → Supersedes 79-859687A1
  • 79-859687A1 → Supersedes 79-858649A3
  • 79-858649A3 → Supersedes 79-858649A1
  • 79-858649A1 → Supersedes 79-825734A1
  • 79-825734A1 earlier OEM water-pressure gauge reference

OEM / Related Numbers

  • 79-825734A1
  • 825734A1
  • 825734
  • 79825734A1
  • 79-858649A1
  • 79-858649A3
  • 79-859687A1
  • 79-895288A01
  • 895288A01

Aftermarket / Verified Equivalents

  • Veethree / Amega: 58392E - 0-15 PSI outboard water-pressure kit
  • Veethree: 112376 - Lido Pro water-pressure gauge kit

📦 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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