Lower Unit Gearcase Seal Kit 26-43035A4 18-2626 for Mercury 40 45 50 55 60 65 HP
Lower Unit Gearcase Seal Kit 26-43035A4 18-2626 for Mercury 40 45 50 55 60 65 HP
Product Overview
Lower unit gearcase seal kit for Mercury, Mariner and Force outboards from 40 HP to 65 HP, supplied as 1 x complete set of gaskets, O-rings, oil seals and water tube seals. It replaces Mercury 26-43035A1, 26-43035A2, 26-43035A3, 26-43035A4 and 26-43035A05, plus Sierra 18-2626, GLM 87590 and Mallory 9-74200. A failed seal shows up as milky gear oil, an oil slick under the leg, or water found when the drain plug is pulled at service.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Lower Unit Gearcase Seal Kit |
| Engine Type | Mercury / Mariner / Force outboard |
| Horsepower Range | 40 HP - 65 HP |
| Contents | Gaskets, O-rings, oil seals, water tube seals, insulator bushing |
| Warranty | Standard |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Mercury | 26-43035A1, 26-43035A2, 26-43035A3, 26-43035A4, 26-43035A05 |
| Sierra | 18-2626 |
| GLM | 87590 |
| Mallory | 9-74200 |
Compatible Engines
Fits the following Mercury, Mariner and Force outboards:
| Brand | HP |
|---|---|
| Mercury / Mariner / Force | 40 HP |
| Mercury / Mariner / Force | 45 HP |
| Mercury / Mariner / Force | 50 HP |
| Mercury / Mariner / Force | 55 HP |
| Mercury / Mariner / Force | 60 HP |
| Mercury / Mariner / Force | 65 HP |
What's Included
| Component | Qty |
|---|---|
| Impeller Face Plate Gasket | 1 |
| Impeller Gasket | 3 |
| Drain Screw Gasket | 1 |
| O-Ring | 3 |
| Oil Seal | 2 |
| Water Tube Seal | 2 |
| Insulator Bushing | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model and serial number before ordering
- Fits Mercury, Mariner and Force 40-65 HP outboards
- Pressure test the gearcase after fitting to confirm the seals hold
- Check the prop shaft and driveshaft for wear grooves before fitting new seals
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
Couldn't load pickup availability
Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
What payment methods do you accept?
We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.