Mercury – 808483K1 Ignition Cap and Rotor Kit | V8 GM / MerCruiser Engines | Delco Ignition | 808483K1

Overview

There’s nothing quite like the sound of a V8 MerCruiser rumbling to life — crisp ignition, steady idle, and that deep, unmistakable tone that says everything’s running right. The Mercury 808483K1 Ignition Cap and Rotor Kit keeps that moment alive by ensuring consistent spark delivery and clean electrical contact across every cylinder.

Built for 1997 and older GM/MerCruiser V8 engines with Delco HEI ignition systems, this OEM kit delivers factory-grade reliability in one simple package. Whether you’re firing up after winter storage or chasing a smooth idle that never falters, this cap and rotor combo helps your engine start strong and stay strong — season after season.

Key Features

• Purpose: Restores clean, consistent spark delivery for optimal ignition performance on older MerCruiser V8 engines.
• Fitment: Designed for 1997 and older GM/MerCruiser V8 engines with Delco HEI ignition systems.
• Construction: Cap molded from a PBT/PET plastic blend for superior strength, stiffness, and resistance to heat warping.
• Electrical Integrity: Solid brass terminals resist corrosion and electrical pitting, ensuring a steady spark under marine conditions.
• OEM Design: Factory-tested for precision fit and electrical performance to Mercury Marine’s strict specifications.

Engine & Boat Compatibility

• V8 GM / MerCruiser engines (1997 and older)
• Delco HEI ignition systems
• Common on inboard cruisers, classic runabouts, and sterndrive boats

Performance & Practical Benefits

This cap and rotor kit brings your ignition system back to factory efficiency. The heavy-duty plastics prevent distortion from heat or vibration, keeping contacts aligned and secure. Brass inserts provide long-lasting conductivity that won’t corrode or pit like lesser materials, giving you crisp ignition and smoother idle performance.

When paired with proper ignition wires and plugs, the 808483K1 helps reduce misfires, cold-start hesitation, and uneven power delivery. It’s the small, precision-built parts like this that keep older MerCruiser engines running like new — reliable, balanced, and ready every time you hit the key.

Why Buy OEM

Mercury OEM ignition parts are built for one purpose: dependable spark under real-world marine conditions. Unlike generic aftermarket caps that may use lower-grade plastics or plated contacts, Mercury’s components are engineered for long-term stability and electrical integrity.

When you buy OEM, you’re getting factory-level quality designed to last. That means fewer tune-ups, more consistent performance, and the kind of reliability that keeps your weekends on the water — not in the shop.

FAQ

Q1: Which engines does the Mercury 808483K1 fit?
A: It’s designed for 1997 and older GM/MerCruiser V8 engines equipped with Delco HEI ignition systems.

Q2: What makes this kit better than aftermarket versions?
A: Mercury’s cap and rotor use a PBT/PET plastic blend and solid brass inserts, providing better durability and conductivity than most aftermarket alternatives.

Q3: Can I install it myself?
A: Yes. If you’re comfortable performing standard ignition maintenance, installation is straightforward with basic hand tools.

Q4: Is this kit suitable for saltwater boats?
A: Absolutely. The corrosion-resistant materials are designed for long life in both freshwater and saltwater environments.

Q5: How often should I replace the ignition cap and rotor?
A: Mercury recommends inspecting and replacing them every 100 hours or annually for peak performance, depending on usage conditions.