Mercury – Oil Change Kit, 15/20HP FourStroke, 1 Liter | Maintenance | 8M0081914

Overview

The little 15 and 20HP Mercury FourStroke carb motors are simple and reliable, but they absolutely depend on clean oil. They run warm, they get used hard on small boats, and they don’t have a lot of extra lubrication margin. This kit gives you everything you need to knock out an oil change without hunting for parts—one bottle of the right marine oil, the correct filter, a new drain plug seal, and a drip tray so the job doesn’t turn into a mess on the trailer. It’s a quick, easy bit of maintenance that keeps these small outboards running like they should.

Key Features

 • Built for 15–20HP FourStroke Carb Models – Contains the exact oil and filter these engines are designed for.
 • Mercury 25W-40 Marine Oil – Holds up to heat, long idles, and higher-rpm bursts.
 • OEM Oil Filter – Keeps debris out and helps the little motor stay smooth.
 • Drain Plug Seal – Fresh gasket for a clean, tight seal.
 • Drip Tray Included – Handy for catching the drips these compact engines always seem to make.

Engine & Boat Compatibility

 • Mercury 15HP FourStroke (carbureted)
 • Mercury 20HP FourStroke (carbureted)
 • Portable 4-stroke outboards

Performance & Practical Benefits

Fresh oil makes a noticeable difference on engines this size. Idle smooths out, cold starts don’t feel as dry, and the motor doesn’t sound like it’s working as hard when you throttle up. These small FourStrokes run warmer than most people expect, so clean oil helps them stay healthy through tough days of trolling, hauling gear, or pushing a skiff around in chop.

Why Buy OEM

With OEM kits, the parts fit and behave exactly how Mercury designed them to. The oil has the right additive package for marine life, the filter seals properly, and you don’t end up chasing pressure issues caused by off-brand parts. On a small motor that already works overtime, proper lubrication goes a long way.

FAQ

Q1: How do I know it’s time for an oil change?
A: Dark oil, a rougher idle, or hitting your recommended service hours.

Q2: Anything special after refilling?
A: Let it run for a moment, then recheck the level once it settles.

Q3: Is this oil good for saltwater use?
A: Yes—the blend includes corrosion inhibitors meant for harsh marine environments.

Q4: Any tips to keep the job clean?
A: Warm the motor a minute; warm oil drains easier and makes less of a mess.

Q5: What happens if the filter is clogged?
A: You may notice sluggish acceleration, an uneven idle, or drifting oil pressure.