Mercury – Oil Change Kit, 75/90/115HP FourStroke, 1.7 Liters | Maintenance | 8M0081913

Overview

These 1.7L Mercury FourStroke engines—75, 90, and 115HP—are pretty tough, but they run noticeably better when the oil is fresh. They see a lot of mixed use: long idle zones, hard throttle bursts, hot days sitting on the water… all of it adds up. When the oil starts getting tired, the motor will feel a little lazier, maybe idle a bit rough, or just sound “warmer” than it should. This kit makes the oil change simple. You get five bottles of the right marine oil, the correct filter, a new drain plug seal, and a drip tray so you don’t turn the job into a cleanup project.

Key Features

 • For 75–115HP 1.7L FourStroke EFI Engines – Everything matches what these motors are built to use.
 • Five 1-L Bottles of 25W-40 Oil – Designed to take heat, high load, and long running hours.
 • OEM Filter – Keeps debris out and helps these engines stay smooth and predictable.
 • Drain Plug Seal – Fresh gasket to avoid drips after the job.
 • Drip Tray – Handy when draining warm oil in tight spaces.

Engine & Boat Compatibility

 • Mercury 75HP FourStroke EFI (1.7L)
 • Mercury 90HP FourStroke EFI (1.7L)
 • Mercury 115HP FourStroke EFI (1.7L)
 • Serial range: 1B366823–2B094995

Performance & Practical Benefits

With new oil and a fresh filter, these engines usually settle right down. Idle smooths out, throttle feels more responsive, and the motor handles long runs without sounding strained. The 1.7L motors run warmer than people expect, so clean oil with the right additives helps them stay cool and happy. Cold starts also improve since the oil actually clings where it needs to.

Why Buy OEM

Mercury built these engines around this exact oil weight and filter design. The additive package in the oil handles moisture, heat, and long idle times far better than automotive oils. The OEM filter also keeps oil pressure steady and seals properly. Using the right kit just removes the guesswork.

FAQ

Q1: How do I know the motor needs fresh oil?
A: Dark oil, a slightly rough idle, slower throttle response, or simply hitting your service hours.

Q2: Anything special after filling?
A: Let it run a minute and then check the oil level once it settles.

Q3: Is this oil good for saltwater rigs?
A: Yep—it's built with corrosion protection for exactly that.

Q4: Any trick to making the job cleaner?
A: Warm the engine first—warm oil drains quicker and splashes a lot less.

Q5: What happens if the filter gets tired?
A: You’ll usually see uneven idle, sluggish acceleration, or drifting oil-pressure readings.