Mercury – 300 Hour Maintenance Kit | FourStroke Service Package | Complete OEM Components | 8M0097855

Overview

There’s a certain comfort that comes from knowing your outboard is properly cared for—the kind of confidence that settles in right before you throttle up at dawn, or when you’re easing home after a long day on the water. Routine maintenance is part of that peace of mind, and having everything you need in one place makes the job feel less like a chore and more like an investment in every future trip. The Mercury 8M0097855 300 Hour Maintenance Kit brings that reassurance to your dock or garage, giving you a complete, factory-matched set of components built specifically for Mercury 2.1L 75–115 horsepower FourStroke engines.

Key Features

• Complete 300-hour service kit for Mercury 2.1L 75–115 horsepower FourStroke outboards
• Includes oil filter, fuel filters, gearcase drain seals, four spark plugs, thermostat kit, water impeller kit, and anodes
• High-pleat oil and fuel filters designed for superior debris capture and filtration stability
• Heavy-duty electroplated housings that resist corrosion in real-world marine environments
• Genuine OEM components for reliable fit, performance, and long-term durability

Engine & Boat Compatibility

The Mercury Marine part number 8M0097855 is designed for:

• Mercury 2.1L 75–115 horsepower FourStroke outboards
• Engines with serial numbers 2B095049 and higher
• Commonly found on bay boats, pontoons, aluminum fishing rigs, center consoles, runabouts, and utility boats

If you’re running one of Mercury’s dependable mid-range FourStroke engines, this kit brings everything together for the required 300-hour service interval.

Performance & Practical Benefits

A well-maintained FourStroke just feels different on the water. Starts come quicker, idle stays calmer, and your throttle response feels crisp and confident. This maintenance kit supports that smoothness by pairing precision-fit components with OEM-level reliability.

The impeller and thermostat help maintain steady cooling flow, keeping the engine protected even during long runs or tight maneuvering in the heat of summer. Fresh spark plugs restore clean, strong ignition so your outboard pulls smoothly from idle to wide-open throttle. The filters keep fuel and oil flowing clean, preventing buildup that can rob power or shorten engine life.

Everything in the box is designed to fit correctly the first time, giving you a service job that feels secure, tight, and professionally done, whether you’re handling it yourself or bringing the kit to your mechanic.

Why Buy OEM

When it comes to routine service, shortcuts show up sooner or later—reduced lifespan, poor fitment, or parts that just don’t stand up to marine wear. This kit avoids all of that.

Choosing Mercury OEM means:

• Components engineered for your exact engine
• Materials tested for heat, corrosion, and long-term exposure
• Consistent performance you can trust offshore or inland
• A cost-effective package that simplifies maintenance and avoids guesswork

It’s the straightforward, practical choice for boaters who want their engine running as strong in year ten as it did in year one.

FAQ

Q1: Which engines does the Mercury 8M0097855 kit fit?

It fits Mercury 2.1L 75–115 horsepower FourStroke engines with serial numbers 2B095049 and higher.

Q2: What makes this different from aftermarket service kits?

Every part is Mercury OEM—tested, matched, and proven specifically for these engines.

Q3: How do I confirm this is the right kit for my motor?

Check your serial number and confirm your engine is a 2.1L 75–115 horsepower FourStroke.

Q4: Is this kit suitable for both saltwater and freshwater use?

Yes—OEM components are built to withstand both environments.

Q5: Is this service manageable for most boat owners?

Most hands-on boaters can complete it, especially with a service manual. Otherwise, bring the kit to your technician.