Sea-Dog 502150H1 Lower Unit Gear Lube Pump — Standard
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Sea-Dog 502150H1 is a nylon and aluminum lower unit gear lube pump designed for routine outboard and sterndrive lower unit oil changes. The standard pump fits standard quart-sized gear lube bottles, and the flexible hose makes it easy to reach drain and fill ports in tight or awkward locations.
The pump includes a threaded 3/8"-16 fitting compatible with a wide range of popular outboard and sterndrive lower units, including MerCruiser, OMC, Evinrude, Johnson, Honda (70 hp and up), Volvo, Force, Mercury (US-origin models), and Gamefisher. A Yamaha adapter (8mm-1.25) is included for use with Mercury (Japanese-origin models), Yamaha, Nissan, Tohatsu, and Honda outboards.
Parts Desk Insights
Best Use Case: Routine lower unit gear lube changes on outboard and sterndrive engines. This pump is the right choice when you're doing a seasonal service or annual maintenance and need a clean, controlled way to fill the lower unit from the bottom up — the correct method for avoiding air pockets. The flexible hose is especially useful on engines where the fill port is recessed or partially blocked by the engine mount or hull.
Compatibility Note: Verify your lower unit drain/fill port thread spec before ordering. The included 3/8"-16 fitting covers most US-market outboards; the Yamaha adapter covers Japanese-origin Mercury and most Yamaha, Nissan, and Tohatsu motors. Honda 70 hp and up is covered by the primary fitting.
Pair With: Use with Sierra 96802 Full Synthetic Lower Unit Gear Lube (1 Qt) for a complete lower unit service. For an alternative pump option, see the Star Brite 27410 Lower Unit Gear Lube Pump.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.