Mercury – Oil Change Kit, 25/30HP EFI FourStroke, 2 Liters | Maintenance | 8M0081915

Overview

These 25 and 30HP Mercury EFI four-strokes are tough little engines, but they definitely let you know when the oil’s getting tired. They idle a lot, they take plenty of short bursts to full throttle, and they run warm for their size. This kit keeps the whole oil-change job simple—two bottles of the right 25W-40 oil, the proper filter, a new drain plug seal, and a drip tray so you’re not chasing oil across the skeg. It’s everything you need in one box, which makes life easier whether you’re doing the job at home or at the ramp.

Key Features

 • Built for 25–30HP EFI FourStrokes – Oil and filter matched to what these motors actually want.
 • 25W-40 Marine Oil – Holds up on hot days and long runs without thinning out.
 • OEM Oil Filter – Keeps the internals clean and the engine running smooth.
 • Drain Plug Seal – Fresh gasket so you don’t end up with a slow drip later.
 • Drip Tray – Saves your cowling and trailer from oily fingerprints.

Engine & Boat Compatibility

 • Mercury 25HP EFI FourStroke
 • Mercury 30HP EFI FourStroke
 • Small EFI outboards
 • Portable 4-stroke setups

Performance & Practical Benefits

After a good oil change, these motors usually sound happier. Idle settles down, they start easier, and they don’t feel like they’re straining when you push the throttle. Clean oil also helps them stay cooler, which matters a lot on small outboards that work harder than most people give them credit for.

Why Buy OEM

With OEM oil and filters, you’re giving the engine exactly what Mercury built it around. The filter seals right, the oil has the right additives for marine use, and you don’t get the pressure swings or mystery noises that cheap filters can cause. Small engines reward good maintenance—this is the “good maintenance” part.

FAQ

Q1: What usually tells me the oil’s ready to be changed?
A: Dark oil, a slightly rougher idle, or hitting your recommended hours.

Q2: Anything special after refilling?
A: Just run it for a moment and recheck the level once it settles.

Q3: Good for saltwater?
A: Yep—this oil’s loaded with corrosion inhibitors.

Q4: Any tips for keeping the mess down?
A: Warm the motor for a minute; warm oil flows cleaner and drains quicker.

Q5: What happens if the filter’s getting clogged?
A: The motor may feel sluggish, idle unevenly, or show funny oil-pressure readings.