Mercury – Quicksilver 808483Q2 Distributor Cap Kit | Marinized GM V8 Engines | Delco HEI Ignition | 808483Q2

Overview

When you turn the key and that big V8 comes alive — quick spark, steady idle, and that deep note through the transom — you know your ignition system’s doing its job. The Quicksilver 808483Q2 Distributor Cap Kit helps make that happen every single time. Built for 1998 and newer marinized GM-based MerCruiser V8 engines with Delco HEI ignition systems, this OEM-quality cap is made to take the heat, moisture, and vibration that come with real boating life.

It’s not the kind of part you brag about, but you’ll feel its difference every time you start your engine and it just fires right up. Consistent, reliable spark — that’s what keeps your boat running smooth, whether you’re trolling a quiet cove or pushing full throttle toward open water.

Key Features

• Purpose: Distributes spark evenly and reliably across all cylinders for smooth starts and efficient combustion.
• Fitment: For 1998 and newer GM V8 MerCruiser engines equipped with Delco HEI ignition systems.
• Construction: Durable PBT/PET composite shell that resists warping, cracking, and heat distortion under heavy marine use.
• Electrical Components: Solid brass terminals for consistent conductivity and corrosion resistance in harsh marine environments.
• Design Advantage: Engineered to reduce RFI interference that can disrupt GPS, sonar, or onboard electronics.

Engine & Boat Compatibility

• GM / MerCruiser V8 engines (1998 and newer)
• Delco HEI ignition systems
• Common on inboard cruisers, sterndrive runabouts, and offshore boats

Performance & Practical Benefits

The 808483Q2 distributor cap is one of those simple parts that quietly makes everything better. The heavy-duty plastic blend holds its shape, even when the engine bay’s cooking hot, keeping the spark path stable and consistent. The solid brass inserts deliver clean current from the rotor to the plugs, cutting down on misfires and weak spark.

You’ll notice the payoff in smoother starts, a steadier idle, and clean acceleration across the RPM range. And since it’s engineered to dampen radio frequency noise, your electronics — from depth finder to VHF — stay clear of static. Mercury built this cap for real boats and real boaters who just want their engines to fire and run the way they should.

Why Buy OEM

OEM parts aren’t about fancy marketing — they’re about trust. Mercury builds these distributor caps from materials tested for marine duty: constant heat, vibration, and exposure to moisture. That’s why they last longer and perform better than most aftermarket versions that cut corners on plastics or plating.

Buying OEM means you’re installing the same part your engine was designed to run with — no guesswork, no fit issues, and no premature failure. It’s the right call for anyone who’d rather spend the weekend on the water instead of chasing ignition problems at the dock.

FAQ

Q1: Which engines use the Quicksilver 808483Q2?
A: It’s made for 1998 and newer GM-based MerCruiser V8 engines with Delco HEI ignition systems.

Q2: How is it different from the 808483Q1 model?
A: The 808483Q1 fits earlier engines (1997 and older), while the 808483Q2 is designed for newer marinized GM V8s.

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

Q4: Does it hold up in saltwater?
A: Yes. The brass terminals and reinforced plastic body are built for corrosion resistance and long service life.

Q5: Will it interfere with electronics?
A: No — it’s engineered to resist RFI interference, keeping your communication and navigation systems clear.