Mercury – 300 Hour Maintenance Kit | Verado & SeaPro Series | Factory Components | 8M0149932

Overview

When you run a big V8 offshore engine, you get used to depending on it in a way that’s almost personal. You learn its sound, the way it settles into a steady hum, the way it pulls when the water gets a little heavy. And because you rely on that engine so completely, you want to know the maintenance you’re doing is the kind that actually preserves that confidence. The Mercury 300 Hour Maintenance Kit 8M0149932 gives you exactly that reassurance — the comfort of knowing your engine is cared for with the same quality parts it was built with. It’s the kind of kit that keeps long days on the water feeling easy, not stressful.

Key Features

• Complete 300-hour maintenance kit for Mercury 4.6L V8 Verado and SeaPro outboards
• Includes oil filter, fuel filter, oil drain seal, spark plugs, thermostat, alternator belt, anodes, and water pump repair kit
• High-pleat-count filters for increased fuel and oil cleanliness
• Heavy-duty electroplated components designed to resist marine corrosion
• Direct Mercury Marine part replacement for precise, reliable servicing

Engine & Boat Compatibility

• Designed for Mercury 4.6L V8 Verado outboards
• Fits Mercury 4.6L V8 SeaPro outboards
• Compatible with engines with serial numbers 2B529482 and higher
• Ideal for offshore center consoles, commercial boats, bay boats, large pontoons, workboats, and high-use vessels

Performance & Practical Benefits

A 300-hour service isn’t just routine maintenance — it’s a chance to reset your engine back to its best. This kit helps ensure your V8 runs smooth, steady, and strong, even after seasons of hard use. The new spark plugs bring back that crisp throttle response you miss when the old set starts to fade. Fresh filters keep fuel and oil clean so the engine doesn’t have to fight contaminants. The thermostat restores accurate temperature regulation, which means better efficiency and more predictable performance.

The new alternator belt gives you a feeling of security you can actually sense, especially when you’re miles away from the marina and relying on your charging system to stay steady. And the anodes — maybe the smallest pieces in the box — play one of the biggest roles by protecting your engine from the quiet, creeping damage that corrosion can cause. Paired with a new water pump repair kit, you get a cooling system that feels tight and trustworthy again.

All together, this kit makes your engine feel younger, cleaner, and more refined — the way a Mercury should.

Why Buy OEM

• Every component is built to Mercury’s exact engineering standards
• Longer-lasting performance compared to generic aftermarket parts
• Keeps your engine running the way Mercury intended
• Cost-effective protection for high-value outboards
• Ensures proper fitment with no guesswork

If you’ve owned a few boats, you already know the truth: cutting corners on maintenance always costs more in the long run. When it comes to a V8 Verado or SeaPro, staying OEM is the smart move.

FAQ

Q1: Which engines does this maintenance kit fit?

It fits Mercury 4.6L V8 Verado and SeaPro outboards with serial numbers 2B529482 and above.

Q2: What makes this better than an aftermarket kit?

OEM components match the exact tolerances, materials, and coatings used by Mercury, giving you more reliable operation and longer service life.

Q3: How do I know if this is the right kit for my engine?

Check your serial number and verify that your engine is a 4.6L V8 Verado or SeaPro within the correct range.

Q4: Can this kit be used for boats in saltwater?

Yes — it includes corrosion-resistant components and anodes specifically designed for harsh marine environments.

Q5: Is installation straightforward?

Most experienced boat owners or marine technicians will find the process familiar and manageable with standard tools.