Quicksilver – V-Power Spark Plug LFR5A-11 | Ignition System Components | Trivalent Metal Plating | 859495Q

Overview

There’s a quiet confidence that comes from firing up your engine and hearing it settle into a smooth, calm idle. No hesitation, no stumble — just steady power waiting to take you wherever the morning leads. That feeling usually comes from small parts doing their job exactly right, and a spark plug is one of the most overlooked heroes in that mix. This Quicksilver-supplied NGK V-Power plug brings that reliability back into focus. When you trust your ignition, everything else on the water feels easier.

Key Features

• NGK LFR5A-11 V-Power spark plug with factory-set gap
• “V” cut center electrode for increased ignitability
• Trivalent metal plating for corrosion resistance
• Ribbed suppressor seal to reduce electrical flashover
• Resistor design to minimize interference with onboard electronics
• Quicksilver part number 859495Q

Engine & Boat Compatibility

• Designed for Mercury and Mariner outboards requiring the LFR5A-11 plug
• Suitable for many mid-range and high-output engines across various horsepower ratings
• Ideal for fishing boats, pontoons, center consoles, and runabouts
• Works with engines used in lakes, rivers, bays, and coastal environments

Performance & Practical Benefits

A good spark plug feels almost invisible when it’s doing its job right. You crank the key, the engine wakes up, and the boat moves the way you expect it to. This plug produces a clean, concentrated spark that gives your engine quick ignition and steady combustion. You’ll feel it in the way the engine responds to throttle changes — smooth climbs, tight acceleration, and consistent mid-range pull.

The corrosion-resistant plating is especially valuable in marine use, where moisture and salt can turn an inferior plug into a seized mess. Here, removal stays simple and predictable, season after season. The plug’s internal structure helps prevent misfires, flashover, and radio noise, which means your electronics stay quiet and your engine stays on rhythm. It’s the kind of part you install, trust, and rarely think about again — exactly how an ignition component should be.

Why Buy OEM

There’s temptation to grab a cheaper plug from a hardware store shelf, but Mercury Marine engines are built to exact standards. Using the plug specified by the manufacturer keeps your performance consistent and your maintenance straightforward. With Quicksilver supplying genuine NGK plugs designed for Mercury’s ignition systems, you get the right heat range, the right durability, and the right spark every time. It’s an inexpensive part that protects a very expensive engine — and that alone makes the OEM choice a smart one.

FAQ

Q1: Which engines does this spark plug fit?

Any Mercury or Mariner engine that calls for the NGK LFR5A-11 plug in its owner’s manual.

Q2: Why is this better than aftermarket options?

It delivers the exact ignition performance Mercury engineers expect, with trusted materials that hold up in marine environments.

Q3: How do I make sure it’s the correct plug?

Check your engine manual. If LFR5A-11 is specified, this is the exact replacement.

Q4: Can it be used in saltwater and freshwater?

Yes — the plating provides strong resistance against corrosion in both environments.

Q5: Is installation easy for most boaters?

Very. With a spark plug socket, it’s a quick, straightforward job.