Gear Housing Oil Seal – Fits Mercury Marine 105-250 HP & MerCruiser Alpha One/Gen 2 (Replaces Mercury 26-14077, Force F697555, OMC 320862)
Gear Housing Oil Seal – Fits Mercury Marine 105-250 HP & MerCruiser Alpha One/Gen 2 (Replaces Mercury 26-14077, Force F697555, OMC 320862) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This high-quality Gear Housing Oil Seal – Fits Mercury Marine 105-250 HP Outboards & MerCruiser Alpha One/Gen 2 Stern Drives (Replaces 26-14077) is engineered to prevent oil leaks and ensure proper lubrication for your marine engine's gearcase. It provides a reliable fit for a wide range of Mercury Marine outboards (105-250 HP), MerCruiser R/MR, Alpha One, and Alpha One Gen 2 stern drives, as well as select Force/Chrysler and OMC models.
This part serves as a direct replacement for Mercury 26-14077 and 26-F697555; Force F697555; OMC 320862; Sierra 18-2077; GLM 85130; and Mallory 9-76119.
- Constructed from a durable rubber compound with a metal casing for a secure, press-fit installation.
- Designed to prevent gear lube from leaking out and water from entering the gearcase.
- Engineered to withstand standard marine operating temperatures and pressures.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 26-14077 |
| Mercury | 26-F697555 |
| Force | F697555 |
| OMC Johnson/Evinrude | 320862 |
| Sierra | 18-2077 |
| GLM | 85130 |
| Mallory | 9-76119 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury outboards, this seal fits various 2-stroke and DFI models from 105 to 250 HP, including Jet, Pro XS, and Racing series. Check your serial number range against the tables.
For MerCruiser stern drives, this seal is widely used in R/MR, Alpha One (Gen 1 & 2), and Vazer drive units. Serial numbers are critical for confirming fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | 105 JET | 105 | 2-Stroke | 0G303046–0G760299 | 26-14077 |
| Mercury | 110 JET | 110 | 2-Stroke | 1B690542–1B974227 | 26-14077 |
| Mercury | V-115 DFI | 115 | 2-Stroke | 0G960500–0T178499 | 26-14077 |
| Mercury | V-135 | 135 | 2-Stroke | 0G303046–0T178499 | 26-14077 |
| Mercury | V-135 DFI | 135 | 2-Stroke | 0G590000–1B417702+ | 26-14077 |
| Mercury | V-140 JET | 140 | 2-Stroke | 0G303046–0T178499 | 26-14077 |
| Mercury | V-150 | 150 | 2-Stroke | 0G303046–1B226999 | 26-14077 |
| Mercury | V-150 EFI | 150 | 2-Stroke | 0G303046–1B227000+ | 26-14077 |
| Mercury | V-150 DFI | 150 | 2-Stroke | 0G590000–1B417702+ | 26-14077 |
| Mercury | 150 Pro XS | 150 | 2-Stroke | 1B690542–2B535572 | 26-14077 |
| Mercury | 150 EFI PRO MAX/SUPER MAG | 150 | 2-Stroke | 0D935000–0G856999 | 26-14077 |
| Mercury | V-175 | 175 | 2-Stroke | 0G303046–0G960499 | 26-14077 |
| Mercury | V-175 EFI | 175 | 2-Stroke | 0G303046–0T800999+ | 26-14077 |
| Mercury | V-175 DFI | 175 | 2-Stroke | 0T178500–1B417702+ | 26-14077 |
| Mercury | 175 Pro XS | 175 | 2-Stroke | 1B516339–2B535624 | 26-14077 |
| Mercury | V-200 | 200 | 2-Stroke | 0G303046–1B226999 | 26-14077 |
| Mercury | V-200 EFI | 200 | 2-Stroke | 0G303046–1B227000+ | 26-14077 |
| Mercury | 200 DFI | 200 | 3.0L | 0G386496–1B504988 | 26-14077 |
| Mercury | 200 EFI | 200 | 3.0L | 0T750164–1B504988 | 26-14077 |
| Mercury | 200 DTS DFI | 200 | 3.0L | 0T980000–1B504988 | 26-14077 |
| Mercury | 200 EFI PRO MAX/SUPER MAG | 200 | 2-Stroke | 0D935000–0G856999 | 26-14077 |
| Mercury | 225 CARB | 225 | 3.0L | 0D280813–0T408999 | 26-14077 |
| Mercury | 225 EFI | 225 | 3.0L | 0G129222–1B504988 | 26-14077 |
| Mercury | 225 DFI | 225 | 3.0L | 0G590000–1B504988 | 26-14077 |
| Mercury | 225 DTS DFI | 225 | 3.0L | 0T599000–1B504988 | 26-14077 |
| Mercury | 225 MARATHON/SEAPRO | 225 | 3.0L | 0G245605–1B417701 | 26-14077 |
| Mercury | 250 EFI | 250 | 3.0L | 0G129222–1B504988 | 26-14077 |
| Mercury | 250 XS | 250 | 3.0L | 0T651945–1E000796 | 26-14077 |
| Mercury Racing | 250XS DFI | 250 | 3.0L | 0T651945–1E000796 | 26-14077 |
| Mercury Racing | 300 ProMax/SuperMag | 300 | 3.0L | 0G610221–0T105297 | 26-14077 |
| Mercury Racing | 300X ProMax | 300 | 3.0L | 0T235084–0T999587 | 26-14077 |
| Mercury Racing | JP 3.0L DFI | - | 3.0L | 0T997974–1E003045 | 26-14077 |
| Brand | Model | Type | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| MerCruiser | R/MR/ALPHA ONE | Sterndrive | 1983–1990 | 26-14077 | S/N 6225577-0F386995 |
| MerCruiser | R/MR/ALPHA ONE | Transom Assembly | 1983–1990 | 26-14077 | S/N 6216687-0F386995 |
| MerCruiser | ALPHA ONE GEN II | Sterndrive | 1991–1995 | 26-14077 | S/N 0D469859-0F679999 |
| MerCruiser | ALPHA ONE GEN II | Sterndrive | 1996–1997 | 26-14077 | S/N 0F680000-0K999999 |
| MerCruiser | ALPHA ONE GEN II | Sterndrive | 1998+ | 26-14077 | S/N 0L100040+ |
| MerCruiser | ALPHA ONE SS | Sterndrive | 1986–1989 | 26-14077 | |
| MerCruiser | SSM II/III/IV/V | Sterndrive | 1982–1995 | 26-14077 | |
| MerCruiser | VAZER | Sterndrive | - | 26-14077 | S/N 0W995000+ |
| MerCruiser | VAZER | Transom | - | 26-14077 | S/N 0W755000+ |
| Brand | Model | Rated HP | Years | OEM Part No. |
|---|---|---|---|---|
| Force | - | 90 | 1989–1994 | 26-F697555 |
| Force | - | 120 | 1990–1994 | 26-F697555 |
| Force | - | 150 | 1989–1994 | 26-F697555 |
| OMC | Cobra | - | - | 320862 |
| OMC | Stringer | - | - | 320862 |
Technical Specs
- Product Type
- Gear Housing/Propeller Shaft Oil Seal
- Installation
- Press-fit
- Housing Material
- Rubber with metal casing
- Dimensions
- 30mm ID × 43mm OD × 6.3mm Thickness
- Working Pressure
- Standard propeller shaft pressure rating
- Operating Temperature
- -20°C to 120°C (-4°F to 248°F)
- Other Technical Attributes
- Prevents oil leaks; ensures proper lubrication
What’s in the Box
- 2 x Oil Seal (26-14077)
Installation Notes
- Position a drain pan under the lower unit and remove the lower drain/fill screw and the upper vent screw to drain the gear lube completely.
- Remove the propeller and the propeller shaft bearing carrier assembly from the gear housing.
- Carefully pry out the old oil seal from the bearing carrier, taking care not to scratch the housing surfaces.
- Thoroughly clean the seal pocket in the bearing carrier to remove any old sealant or residue.
- Apply a thin coat of 2-4-C with PTFE or marine grease to the outer edge of the new seal.
- Using a seal driver or a socket of the appropriate diameter, press the new seal evenly and squarely into the carrier until it is fully seated.
- Reinstall the bearing carrier, propeller, and refill the gearcase with fresh, high-quality marine gear lube.
Troubleshooting & FAQ
How do I know if this oil seal will fit my engine?
The best way to confirm fitment is to check your original part number against the cross-reference list in the Part Number Matrix. Additionally, review the compatibility tables for your specific engine model, year, and serial number range. When in doubt, compare the dimensions (30mm ID x 43mm OD x 6.3mm) with your old seal.
What are the signs of a failing propeller shaft oil seal?
Common symptoms include milky or creamy-looking gear lube, which indicates water contamination, or a noticeable decline in the gear lube level. You might also find gear lube leaking from the propeller shaft area or see an oily sheen on the water around your drive.
Is this seal for the driveshaft or the propeller shaft?
This is a propeller shaft oil seal, located in the gear housing's bearing carrier behind the propeller.
How often should gear housing seals be replaced?
It's good practice to inspect seals whenever you are servicing the gearcase or propeller. They should be replaced as part of a regular lower unit service (e.g., every 100-300 hours or annually), or immediately if you detect any signs of leakage or water intrusion.
Can I reuse the old seal if it looks okay?
No. Oil seals are single-use components. Removing a seal almost always damages it, even if the damage isn't visible. Always install new seals to ensure a proper, leak-free fit.
What kind of sealant or lubricant should I use?
Apply a light film of marine grease or a suitable sealant to the outer metal surface of the seal before pressing it into the housing. Lubricate the inner lip of the seal with grease to prevent damage during shaft installation.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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