Sierra 96805 Full Synthetic Lower Unit Gear Lube, 5-Gallon Pail
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Sierra 96805 Full Synthetic Lower Unit Gear Lube – 5-Gallon Pail
Engineered for demanding marine environments, Sierra 96805 is a full synthetic gear lubricant formulated to maximize gear life and deliver superior wear protection in outboard and sterndrive lower units. The synthetic base stock provides exceptional film strength, thermal stability, and oxidation resistance — outperforming conventional and synthetic-blend gear lubes in high-load, high-temperature, and cold-weather operating conditions.
The 5-gallon pail format is designed for marina service departments, mobile marine mechanics, and commercial operators who need a premium full synthetic gear lube in volume.
Key Features
- Full synthetic formulation — superior wear protection and film strength versus conventional or synthetic-blend gear lubes
- Shear stable — maintains viscosity under high mechanical stress, protecting gears and bearings over the full service interval
- Oxidation resistant — resists breakdown at high operating temperatures for longer service life
- Wide temperature performance — flows readily in cold conditions for reliable cold-start protection, and holds viscosity in high-heat operation
- Friction reduction — reduces heat and wear in the lower unit gear set for improved efficiency and longevity
- API GL-5 / MIL-L-2105E rated — meets the most demanding gear lube service classifications
Specifications
- Base stock: Full synthetic
- API service: GL-5
- Military spec: MIL-L-2105E
- Volume: 5 US gallons (18.9 L)
- Part number: 96805 | SKU: 47-96805
Best Use Case
The 96805 is the right choice for high-performance outboards, performance sterndrives, and any application where extended drain intervals or extreme operating conditions demand the best available gear protection. The full synthetic formulation is particularly valuable for engines running in very cold climates, high-RPM performance applications, or where the lower unit is subject to sustained heavy loads.
For shops or operators who want a high-performance gear lube at a lower price point, the conventional Sierra 96505 Hi-Performance Gear Lube, 5-Gallon Pail is the alternative at the same volume. For smaller-quantity needs, see the Sierra 96502QP Hi-Performance Gear Lube & Pump Kit, 1 Quart or the Sierra 96502 Hi-Performance Gear Lube, 1 Quart. For the highest-volume bulk option, see the Sierra 96507 Hi-Performance Gear Lube, 55-Gallon Drum.
To dispense cleanly from this pail, pair with the Gear Lube Pump or the Sierra 9788 Lube Pump for 5-Gallon Pails.
Parts Desk Insights
Best use case is performance-oriented shops and operators running high-HP outboards or sterndrives where full synthetic protection is specified or preferred. The 96805 commands a premium over the conventional 96505 — lead with the performance and longevity benefits when justifying the price difference. Strong upsell for customers already buying the 96502 quart who service multiple engines or want to reduce per-service cost. Always recommend pairing with a dedicated pail pump for clean dispensing. Confirm lower unit capacity with the customer before recommending volume — most outboard lower units take less than 1 litre per service, so a 5-gallon pail suits shops doing 15+ services per season.
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.