Mercury – 300 Hour Maintenance Kit for 5.7L V10 Verado & SeaPro | Scheduled Service Package | OEM Marine Components | 8M0207808

Overview

Every boater knows the feeling — that deep breath of confidence when your engine fires up smoothly after a long week, waiting patiently for the next run offshore. That trust doesn’t just happen. It comes from taking care of your equipment the right way, with parts you know won’t let you down when the water turns rough or the wind picks up. The Mercury 300 Hour Maintenance Kit 8M0207808 is the kind of service package that brings that confidence back every season. It keeps your V10 Verado or SeaPro breathing clean, cooling properly and performing with the kind of steady strength you feel the moment you slide into gear.

Key Features

• Complete scheduled maintenance kit for Mercury outboards requiring 300-hour service
• Contains premium filters, thermostat assembly, spark plugs, drive belt and additional service components
• Includes impeller repair kit and aluminum anode kit for long-term durability
• Designed specifically for engines with the six point four four inch gearcase
• All components built to Mercury Marine original equipment standards
• Mercury Marine part number 8M0207808
• Fits engines with serial number 3B266064 and above

Engine & Boat Compatibility

• Fits Mercury five point seven liter V10 Verado outboards (three hundred fifty through four hundred twenty-five horsepower)
• Fits Mercury three hundred fifty horsepower SeaPro outboards
• Compatible with six point four four inch gearcase models
• Ideal for offshore center consoles, guide boats, large bay models and sport fishing vessels
• Suitable for heavy-use commercial applications and high-performance recreational setups

Performance & Practical Benefits

This kit brings your motor back to the feeling it had when it rolled out of the factory — tight, clean and eager. The high-pleat-count filters grab the fine debris that can rob your engine of power over time, letting the V10 breathe easier and run cooler. The impeller repair kit restores strong, steady cooling water flow, which you’ll notice on long idle sessions around the marina or during those hours spent tracking open-water bait.

Fresh spark plugs sharpen throttle response, smoothing out the transition from idle to plane. The new drive belt settles into place with a quiet, confident tension that keeps your alternator and cooling systems spinning like they should. And the included anode kit restores vital corrosion protection — especially important if you spend your days in brackish inlets or offshore swells.

When everything in the kit comes together, the motor just feels better. The idle smooths out. The midrange pushes cleaner. You hear less strain and more effortless power. It’s one of those upgrades you feel in your hands on the wheel, not just in the toolbox.

Why Buy OEM

Maintenance is one place where cutting corners always costs more later. Mercury’s OEM parts are engineered specifically for the V10 platform — the right thermostat opening temps, the right plug heat range, the right filter media and impeller tolerances. Aftermarket pieces might fit, but they rarely match the stability and long-term reliability Mercury builds into its service components.

Using a genuine Mercury Marine part ensures you’re protecting a serious investment with parts designed for the heat, vibration and salt that define real boating conditions. Think of it as tuning your engine with the same precision the engineers intended. It’s practical, cost-effective and the smartest choice for anyone who counts on their engine far from the dock.

FAQ

Q1: Which engines does the 300 Hour Kit 8M0207808 fit?

It fits Mercury five point seven liter V10 Verado outboards (three hundred fifty to four hundred twenty-five horsepower) and the three hundred fifty horsepower SeaPro with a six point four four inch gearcase.

Q2: What makes this kit better than aftermarket bundles?

Every component meets Mercury Marine’s original equipment standards, ensuring the proper fit, correct filtration and reliable performance.

Q3: How can I confirm this is the right kit for my engine?

Check your horsepower, the six point four four inch gearcase requirement and verify that your serial number is 3B266064 or higher.

Q4: Can these components be used in saltwater and freshwater?

Yes — all parts are engineered for durability in either environment.

Q5: Is installation manageable for most boat owners?

If you’re comfortable handling routine service, you can install most of this kit with standard tools. Many owners choose to do it themselves.