Mercury – Quicksilver 819503A1 Solenoid Kit | Mercury 65–125HP Carbureted TwoStroke Outboards | 819503A1

Overview

If your outboard hesitates or won’t crank when you turn the key, the starter solenoid is usually the first place to look. The Mercury 819503A1 Solenoid Kit is a direct OEM replacement made for Mercury 65–125HP carbureted TwoStroke outboards. It delivers clean, steady power to the starter every time you fire up the engine.

This solenoid is built tough for marine life — sealed tight against salt, spray, and heat. It’s tested to the same standards Mercury uses on new engines, so you know it’ll last. It’s a small, straightforward fix that keeps your boat ready to run when you are.

Key Features

• Purpose: Restores reliable power transfer from your battery to the starter motor.
• Fitment: For Mercury 65–125HP carbureted TwoStroke outboards.
• Included: Comes with a solenoid and mounting clamp for easy installation.
• Strength: Wiring is tested to handle 20 pounds of pull force for long-term reliability.
• Protection: Built to resist corrosion and meet U.S. Coast Guard electrical standards.

Engine & Boat Compatibility

• Fits Mercury 65HP through 125HP carbureted TwoStroke outboards
• Common on mid-sized fishing boats, pontoons, and older sport boats

Performance & Practical Benefits

A healthy solenoid means your starter motor gets full voltage the instant you turn the key. The 819503A1 keeps that connection strong, so your engine starts fast — no weak clicks, no hesitation. The housing is sealed tight to keep moisture out, and the heavy-gauge wiring holds up under constant vibration.

It installs quickly with a couple of basic tools, and once it’s in place, you can count on smoother, more consistent starts. It’s one of those parts that quietly does its job right every time you hit the switch.

Why Buy OEM

Mercury’s OEM solenoids are built for the harsh reality of boating — heat, vibration, and salt exposure. They’re sealed, pressure-tested, and made from marine-grade materials that outlast generic versions.

Aftermarket solenoids might look the same, but they often use thinner wire and weaker internal springs that fail under load. A genuine Quicksilver solenoid fits perfectly, works every time, and holds up for years.

FAQ

Q1: What engines fit this solenoid kit?
A: It’s designed for Mercury 65–125HP carbureted TwoStroke outboards.

Q2: What’s included?
A: One solenoid and a mounting clamp.

Q3: Is it safe for saltwater use?
A: Yes, it’s built for all marine environments and corrosion-resistant.

Q4: Does it meet marine safety standards?
A: Absolutely — it meets U.S. Coast Guard electrical requirements.

Q5: Why use OEM instead of aftermarket?
A: OEM fits right, lasts longer, and is built to handle real marine conditions without early failure.