Star Brite High-Vis 80W90 Lower Unit Gear Lube, 10 oz – 27010
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Star Brite High-Vis 80W90 Lower Unit Gear Lube – 10 oz | Part #27010
A compact, single-use squeeze tube of 80W90 gear lubricant formulated for outboard and sterndrive lower units. The high-visibility colour makes it easy to spot contamination or water intrusion when draining the old oil — a practical detail that helps catch seal problems early. At 10 oz, this tube is sized for a single lower unit fill on most outboards, making it a clean and convenient option for seasonal maintenance or on-the-water top-ups.
Key Features
- SAE 80W90 viscosity — correct weight for most outboard and sterndrive lower units
- High-visibility formula — makes it easier to detect water contamination or milky discolouration when draining old oil
- API GL-5 / MT-1 rated — meets MIL-L-2105D service requirements
- Anti-wear additives — protects gears and bearings under load
- Rust and corrosion inhibitors — guards internal components in the wet lower unit environment
- Will not void manufacturers’ warranties — compatible with all outboard and sterndrive lower units requiring 80W90 gear lube
- 10 oz squeeze tube — no pump required, direct-fill format
Specifications
- Viscosity: SAE 80W90
- API service: GL-5, MT-1
- Military spec: MIL-L-2105D
- Size: 10 oz (296 mL)
- Part number: 27010
Parts Desk Insights
Best use case: This 10 oz tube is the most convenient format for a single lower unit oil change on a small-to-mid-size outboard — no pump, no mess, no leftover product to store. It’s a great fit for recreational boaters doing their own seasonal maintenance, or as a keep-aboard spare for top-ups when a seal is suspected of weeping. The high-vis colour is a genuine diagnostic advantage: if the oil draining out looks milky or discoloured, you know to investigate the seals before refilling. For larger outboards or multi-unit service where a quart or gallon makes more sense, see the Star Brite Synthetic Blend 80W90 Gear Lube, 1 Gallon – 27200. If you prefer a pump-and-lube kit for a quart-sized fill, the Quicksilver SAE-90 Gear Lube & Pump Kit is a popular alternative. For a universal lower unit pump to use with larger containers, see the Moeller Universal Lower Unit Lube Pump.
Compatibility note: Suitable for all outboard motors and sterndrives requiring 80W90 gear lube. Always confirm your engine’s specification in the owner’s manual before servicing.
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.