How to Change Mercury Outboard Motor Gear Lube | Mercury Optimax 2-Stroke Lower Unit Maintenance

In this video we walk through the complete process to change the gear lube on a Mercury Optimax 115hp lower unit (includes 75/90/115/125 1.5L motors). We show you factory Mercury OEM detailed steps and pictures, along with tips and tricks learned over the past 12 years servicing Mercury outboards.
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Items discussed in this video to review specs and/or purchase. As an Amazon Associate, I earn from qualifying purchases. Links included in this description may be affiliate links. If you purchase products using the links included, I may receive a commission however there is NO additional charge to you. Thank you for the support!
Quicksilver SAE 90 High Performance Gear Lube (WITH pump and special adapter):
www.amazon.com/QuickSilver-80...
Quicksilver 858064Q01 SAE 90 High Performance Gear Lube (WITHOUT pump):
www.amazon.com/Quicksilver-85...
Quicksilver Lower Unit Gear Lube Blue Drain Plug Seal:
www.amazon.com/QuickSilver-Lo...
SAS Safety 66517 Raven Powder-Free Nitrile Disposable Glove, Medium, 6 mil Thick (Pack of 100) Pack of 3 (my favorite gloves):
www.amazon.com/SAS-Safety-665...
Chapters:
00:00 - Intro & Required Items
01:17 - How to Drain Lower Unit
03:02 - Inspect Gear Lube for Water
03:33 - How to Fill Lower Unit
08:57 - Wrap Up
Disclaimer:
Because of factors outside the control of TeamDIYNow, we can’t guarantee against improper use or unauthorized modifications to anything outlined in this video. TeamDIYNow recommends all safety precautions be used when working with vehicles, tools, or anything else talked about or used in this video. TeamDIYNow assumes no liability for personal or property damage or injury incurred as a result of information within this video. No information provided in this video guarantees any expressed or implied warranty or outcome. Any injury, damage, or loss that may result from improper use of tools, equipment, or procedures contained in this video is the sole responsibility of the viewer not TeamDIYNow. Everything demonstrated or implied in this video is to solely be used at your own risk.

[@TeamDIYNow]

Quicksilver SAE 90 High Performance Gear Lube (WITH pump and special adapter): amzn.to/3xL9kkQ Quicksilver 858064Q01 SAE 90 High Performance Gear Lube (WITHOUT pump): amzn.to/3JzXcpr Quicksilver Lower Unit Gear Lube Blue Drain Plug Seal: amzn.to/4beICzH FloTool 11430 25" x 36" Large Drip Tray: amzn.to/3JTbykY

[@hugoshaul6353]

Good video, thank you

[@TeamDIYNow]

Glad you liked it! Thanks for watching.

[@jordanpadilla99]

Will this be the same for a 200hp 2stroke mercury ? I saw a different video where they had to take off the prop to change the oil?

[@TeamDIYNow]

The V6 models do have the gear lube plugs in a different spot, so it is required to remove the prop as the drain is on the back. The one in this video is a 1.5 liter, where it has the drain/vent/oil level on the side so you dont have to remove the prop to change the gear lube. I did a separate video removing the prop on a 115 (kzbin.info/www/bejne/g3XQfn2hZ7V9sJY) the process is the same but depending on which model/prop some of the retainers are different. Just pay attention to the order in which you removed. Hope this helps.