79-817032A1 Mercury Volt Gauge | Genuine Used Part

🔧 Product Description

Genuine Mercury Quicksilver QSI 10-16 Volt Voltmeter - Part Number: 79-817032A1

A genuine used Mercury Quicksilver QSI voltmeter for monitoring a boat's 12-volt battery and charging-system voltage.

The gauge uses a 10-16 volt scale and connects directly to switched instrument power and ground. It does not require a separate engine sender.

⚙️ Key Features

• Genuine Mercury Quicksilver OEM QSI voltmeter

• Correct Mercury part number 79-817032A1

• 10-16 volt operating scale

• Approximately 3-3/8-inch / 86 mm instrument class

• Suitable for conventional 12-volt marine electrical systems

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 79-817032A1 current known OEM service reference

• 817032A1 original unprefixed Mercury reference

OEM / Related Numbers:

• 79-817032A1

• 79817032A1

• 817032A1

• Mercury QSI 10-16 volt battery meter

Aftermarket / Verified Equivalents:

• Stewart-Warner: 82112 - Deluxe 10-16 volt voltmeter

• Veethree: 112364 - Lido Pro 12-volt voltmeter

🚤 Compatibility

Commonly used on:

• Mercury, Mariner and MerCruiser 12-volt helm instrumentation

• Boats requiring a stand-alone charging-system voltmeter

Typically suits:

• Engine models:

• Mercury and Mariner outboard-powered boats with a 12-volt charging system

• MerCruiser petrol sterndrive and inboard boats with a 12-volt charging system

• MerCruiser diesel installations using a 12-volt instrument circuit

• HP Range: Not engine-specific

• Engine Type: 12-volt outboard, sterndrive and inboard marine electrical system

• Year Range: Approximately late 1980s - 1990s

🔌 Function

The voltmeter displays electrical-system voltage at the dashboard. It helps show battery state before starting and alternator or stator charging performance while the engine is running.

Common signs of failure:

• Gauge remains at zero with switched power applied

• Voltage reading is consistently higher or lower than a test meter

• Needle fluctuates because of loose power or ground wiring

• Low reading indicates a weak battery or charging-system fault

• Gauge illumination or internal movement fails

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated