Lower Unit Seal Kit 26-66022 For Mercury Marine 6 HP 8 HP 9.9 HP 10 HP 15 HP
Lower Unit Seal Kit 26-66022 For Mercury Marine 6 HP 8 HP 9.9 HP 10 HP 15 HP
Premium Marine Engine Parts
Lower Unit Seal Kit for Mercury Marine 6 HP 8 HP 9.9 HP 10 HP 15 HP 26-66022
Package Contents
- Oil seal × 3
- O-ring seal × 1
- Grain Gasket × 2
(The package contains all the parts shown in the picture.)
Key OEM Numbers
Oil seal (1):
Oil seal (2):
Oil seal (3):
O-ring seal:
25-33145Drain Fill Washer Gasket:
26-8M0058390Fits Mercury/Mariner Outboard Engine Models
- 6 HP
- 8 HP
- 9.9 HP
- 10 HP
- 15 HP
⚠️ Important: This guide is to be used as a reference only. You must verify fitment using your model or serial number before purchase.
Need Help?
To find the right part for your outboard, it is VERY IMPORTANT to verify the outboard model or serial number before purchase. You can leave us a message with your outboard engine’s model, serial number, horsepower, or year if you are not sure whether this part fits your outboard motor. We're happy to help you.
Before You Buy
Please verify your engine model and serial number before purchase. Contact us for fitment confirmation. Free worldwide shipping from XRmarine.
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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 ship from our global warehouse network (US, Germany, UK, Australia). Typical delivery: 10-20 business days. 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.