Mercury – Quicksilver 817119A4 55 Amp Alternator (Mando) | V-Belt | GM-Based MerCruiser 4-Cylinder, V6 & V8 Engines (1982–2016) | 817119A4

Overview

A weak alternator can leave you with dim lights, low voltage, or worse — a dead battery at the dock. The Quicksilver 817119A4 55 Amp Alternator is a direct OEM replacement for 4-cylinder MerCruiser sterndrive and inboard engines built by General Motors (1982–2016), as well as select V6 and V8 models (1982–1996).

This Mando-style alternator delivers steady charging output and dependable performance. Designed for V-belt applications, it installs easily using standard tools, restoring your electrical system’s strength and keeping your boat’s systems powered like new.

Key Features

• Purpose: Replaces worn or failed alternators to restore consistent battery charging and electrical output.
• Fitment: For 4-cylinder MerCruiser sterndrive or inboard engines (1982–2016) and V6/V8 GM-based models (1982–1996).
• Output: 55 amps for reliable performance under heavy electrical load.
• Drive Type: For V-belt applications only.
• Ease of Installation: Direct replacement, fits existing brackets, and installs with common hand tools.
• OEM Quality: Meets all Mercury Marine specifications for fit, durability, and electrical stability.

Engine & Boat Compatibility

• GM-based MerCruiser 4-cylinder engines (1982–2016)
• GM-based MerCruiser V6 and V8 engines (1982–1996)
• Ideal for inboard and sterndrive setups on cruisers, sport boats, and fishing rigs

Performance & Practical Benefits

The 817119A4 alternator provides a clean, stable 55-amp output to power your electronics, charge your batteries, and support accessories without voltage drop. Its OEM build quality ensures smooth operation and long service life even in marine environments.

You’ll notice brighter lighting, quicker battery recovery, and dependable charging at idle and cruising speeds. Because it’s designed to match your factory brackets and wiring, replacement takes less time — no modifications, no frustration, just bolt it on and go.

Why Buy OEM

Alternators for marine engines face constant moisture, vibration, and high demand from onboard systems. Mercury’s OEM components are specifically designed to handle those challenges, ensuring steady output and corrosion resistance.

Aftermarket units may look similar but often lack proper sealing or the same internal build quality. A genuine Quicksilver alternator gives you factory-grade reliability and performance — exactly what your electrical system was built to handle.

FAQ

Q1: What engines use the Quicksilver 817119A4 alternator?
A: It fits 4-cylinder MerCruiser GM-based engines (1982–2016) and V6/V8 GM-based models (1982–1996).

Q2: What is the output rating?
A: It produces 55 amps of charging current.

Q3: Is it for serpentine or V-belt systems?
A: This model is for V-belt drive applications only.

Q4: Can I install it myself?
A: Yes. It’s a direct-fit replacement and can be installed with basic tools. Always follow your owner’s manual.

Q5: Why choose OEM instead of an aftermarket alternator?
A: OEM alternators deliver the exact output, durability, and corrosion protection Mercury intended — no fitment issues or early failures.