Mercury Gearcase Lubricant Capacity Chart - Less than 75 HP
Recommended Gear Lube:
For Mercury, Mariner, or Force outboards under 75 HP, SAE 80W90 Premium Gear Lube is recommended.
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Please Note: This gear lube capacity chart is limited to recent models and is intended to help determine how much gear lube to have on hand for service. Always change and service gear lube in accordance with your official factory service or owner's manual. Quantities shown are for reference only. Variations may indicate an incorrect model selection, improper service technique, or a more serious internal problem.
| Brand | Model (HP) | Cycle | Model Description | Capacity (Oz.) | Capacity (mL.) |
|---|---|---|---|---|---|
| Mercury / Mariner | 2.2, 2.5, 3.3 | 2 cycle | — | 4.5 | 135 |
| Mercury / Mariner | 4, 5 | 2 cycle | — | 6.8 | 200 |
| Mercury / Mariner | 6, 8, 9.9, 15 | 2 cycle | — | 6.8 | 200 |
| Mercury / Mariner | 20, 25 | 2 cycle | — | 8.8 | 260 |
| Mercury / Mariner | 30, 40 | 2 cycle | 2 cylinder | 14.9 | 440 |
| Mercury / Mariner | 40, 50 | 2 cycle | 3 cylinder, std. Gearcase | 14.9 | 440 |
| Mercury / Mariner | 60 | 2 cycle | Big Foot | 22.5 | 665 |
| Mercury / Mariner | 2.5, 3.5 | FourStroke | — | 6.1 | 180 |
| Mercury / Mariner | 4, 5 | FourStroke | — | 6.8 | 200 |
| Mercury / Mariner | 8 / 9.9 | FourStroke | MY 2004 & prior standard gearcase | 6.8 | 200 |
| Mercury / Mariner | 8 / 9.9 | FourStroke | MY 2005 & newer standard gearcase | 10.8 | 320 |
| Mercury / Mariner | 9.9 | FourStroke | MY 2004 & prior BigFoot | 8.8 | 260 |
| Mercury / Mariner | 9.9 | FourStroke | MY 2005 & newer Big Foot | 12.5 | 370 |
| Mercury / Mariner | 15 (323cc) | FourStroke | Standard Gearcase | 6.8 | 200 |
| Mercury / Mariner | 15 (323cc) | FourStroke | Big Foot | 8.8 | 260 |
| Mercury / Mariner | 15 (351cc) | FourStroke | — | 12.5 | 370 |
| Mercury / Mariner | 20 (351cc) | FourStroke | — | 12.5 | 370 |
| Mercury / Mariner | 25 | FourStroke | Big Foot, Carb | 14.9 | 440 |
| Mercury / Mariner | 25 | FourStroke | EFI | 11.8 | 350 |
| Mercury / Mariner | 30 | FourStroke | MY 2005 & prior | 14.9 | 440 |
| Mercury / Mariner | 30 | FourStroke | MY 2006 & newer EFI | 11.8 | 350 |
| Mercury / Mariner | 30 | FourStroke | MY 2005 & prior Big Foot | 22.5 | 665 |
| Mercury / Mariner | 40 | FourStroke | 3 cylinder, std. Gearcase | 14.9 | 440 |
| Mercury / Mariner | 40 | FourStroke | 3 cylinder, Big Foot | 22.5 | 665 |
| Mercury / Mariner | 40, 45, 50 | FourStroke | 4 cylinder, 935 cc, std. gearcase | 14.9 | 440 |
| Mercury / Mariner | 40, 45, 50 | FourStroke | 4 cylinder, 935 cc, Big Foot | 22.5 | 655 |
| Mercury / Mariner | 40 | FourStroke | 4 cylinder, 996 cc, Big Foot | 24.0 | 710 |
| Mercury / Mariner | 50, 60 | FourStroke | 4 cylinder, 996 cc, std. gearcase | 11.5 | 340 |
| Mercury / Mariner | 50, 60 | FourStroke | 4 cylinder, 996 cc, Big Foot | 24.0 | 710 |
| Force | 5 | 2 cycle | — | 4.0 | 120 |
| Force | 9.9, 15 | 2 cycle | — | 6.8 | 200 |
| Force | 25 | 2 cycle | — | 8.8 | 260 |
| Force | 40, 50 | 2 cycle | — | 14.9 | 440 |