Mercury – 300 Hour Maintenance Kit | L4 Verado Series | Standard Finish | 8M0130835

Overview

There’s a certain peace that settles over you when your outboard fires up smooth and steady, especially after a long run offshore or a full day chasing the bite. That confidence doesn’t come from luck — it comes from taking care of the engine that takes care of you. The Mercury 300 Hour Maintenance Kit for L4 Verado outboards brings all the essentials together so you can service your engine the right way, without second-guessing or hunting down individual parts. It’s the kind of kit that makes you feel prepared, the way every boater should.

Key Features

• Complete 300-hour service kit for Mercury 135–200 horsepower L4 Verado outboards
• Includes: oil filter, fuel filter, thermostat assembly, spark plugs (4), water pump impeller kit, belt, lower unit anodes, oil drain seal, and gearcase seals
• Premium filtration components with high pleat counts for superior contaminant control
• Heavy-duty, corrosion-resistant housings for marine environments
• Convenient all-in-one kit to streamline your regular maintenance

Engine & Boat Compatibility

• Designed specifically for Mercury 135–200 horsepower L4 Verado outboards
• Compatible with serial numbers 1B517159 through 2B576734
• Ideal for center consoles, bay boats, pontoons, offshore fishing boats, sport boats, and multi-purpose family vessels
• Suitable for both freshwater and saltwater applications

Performance & Practical Benefits

A well-maintained Verado feels different on the water — the throttle responds cleanly, the idle stays calm, and the engine holds dependable temperature even on a scorching afternoon. This kit helps you preserve that feeling. Each part is designed to keep your engine running smooth, tight, and predictable, mile after mile.

The oil and fuel filters provide clean flow to protect internal components from wear. The thermostat assembly keeps the engine’s temperature where it needs to be for peak efficiency. The impeller kit helps maintain strong, steady cooling water flow — something you’ll appreciate every time you slide into a shallow inlet or push through choppy seas. And replacing the anodes ensures corrosion stays in check, giving your engine the long-term protection it deserves.

What makes this kit especially practical is how it simplifies the whole maintenance process. Instead of juggling part numbers or making multiple store runs, you get everything in one box. It’s the kind of thoughtful design that saves time and helps you stay ahead of the maintenance curve.

Why Buy OEM

Choosing a genuine Mercury Marine part means choosing components engineered for the exact demands of your Verado. Aftermarket kits often mix brands or include parts that don’t perfectly match the specifications Mercury designed around. With this OEM kit, every seal, filter, and plug fits properly and performs exactly as it should — no guessing, no compromises.

Long term, going OEM is more cost-effective too. Better fit means easier installation, fewer failures, and less risk of chasing performance issues later. If you asked any seasoned boater which kit they trust for a 300-hour Verado service, this is the one they’d recommend.

FAQ

Q1: Which engines does this kit fit?

Mercury 135–200 horsepower L4 Verado outboards with serial numbers 1B517159–2B576734.

Q2: What makes it better than aftermarket kits?

OEM precision, corrosion-resistant components, and matched part quality engineered for Verado performance.

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

Check your engine’s serial number and match it to the range listed for part number 8M0130835.

Q4: Can it be used in both saltwater and freshwater?

Yes — all components are built for harsh marine environments.

Q5: Is installation straightforward?

If you’re familiar with routine outboard service, yes. Everything you need is included and built to fit properly.