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Required for fitment review to confirm compatibility.
The OBR Mercury Verado L6 lower unit is a replacement gearcase for selected Verado L6 applications originally equipped with a 1.85:1 gear ratio and 5.44-inch gearcase. New and remanufactured units are available with 20-, 25- and 30-inch shafts in standard or counter rotation.
Cataloged applications include selected 200, 225, 275 and 300 HP Verado L6 engines from 2006–2021. Horsepower and model year alone cannot confirm fitment. Your engine must match the product’s L6 architecture, original 1.85:1 ratio, 5.44-inch housing, shaft length and rotation.
Enter the complete Mercury engine serial and model numbers before ordering. Fitment for 250 HP applications must be confirmed before purchase.
Verado Optimized: Tailored for the 200, 225, 250, 275, and 300 HP 6-Cylinder Supercharged platform.
1.85:1 Gear Ratio: Precision-cut gears designed for optimal RPM range and fuel efficiency.
Saltwater Protection: Coated with a high-grade marine finish for superior corrosion resistance in harsh ocean environments.
This lower-unit family is cataloged for selected 2006–2021 Mercury Verado L6 applications using a 5.44-inch gearcase and 1.85:1 ratio.
Do not order by horsepower alone. Exact engine suffixes are not supplied in the available OBR listings; provide the complete engine model and serial numbers for verification.
Before shipment, the selected SKU should be reviewed against the engine information submitted with the order. This review should include the engine serial number, model number, original gear ratio, gearcase size, shaft length and rotation. If any information is incomplete or conflicts with the selected configuration, shipment should be paused until the correct fitment is confirmed.
The shipping carton, product label and selected SKU should be inspected before release to the carrier. The gearcase should be securely packaged to protect the driveshaft, propeller shaft, skeg and housing during transit.
This gearcase ships without gear oil. Before installation or operation, it must be filled to the correct level with the lubricant specified for the engine. Proper shift adjustment is also essential. Follow OBR’s published break-in procedure during the first 10 operating hours, including avoiding full-throttle starts, extended constant-speed operation and more than 75% throttle during the first five hours.
When the shipment arrives:
| Specification | Mercury Verado L6 Lower Unit | 1.85:1 |
|---|---|
| Manufacturer | OBR Parts & Marine |
| Compatible engine brand | Mercury |
| Product family | ME-G6-60, ME-G6-61, ME-G6-62, ME-G6-64, ME-G6-65 and ME-G6-66 |
| Condition | New or remanufactured, depending on selected SKU |
| Engine family | Mercury Verado L6 |
| Cataloged horsepower | Selected 200, 225, 275 and 300 HP applications |
| Cataloged years | 2006–2021; engine serial verification required |
| Gear ratio | 1.85:1 |
| Gearcase diameter | 5.44 inches |
| Rotation | Standard or counter rotation, depending on selected SKU |
| Shaft options | 20-inch L, 25-inch XL or 30-inch XXL |
| Gear oil | Ships without oil |
| Warranty | OBR two-year limited gearcase warranty |
| Required customer information | Complete engine serial number, model number, original ratio, shaft length and rotation |
| Major exclusions | 4.8-inch gearcases, 1.75:1 units, non-L6 engines and any configuration with unmatched shaft length or rotation |
Selecting a Mercury Verado L6 lower unit requires more than matching the horsepower printed on the engine cowling. Start by confirming that the engine is an L6 Verado and that its original gearcase uses a 1.85:1 ratio. A 1.75:1 gearcase is not an interchangeable substitute, even when the housings appear similar.
Next, confirm the gearcase diameter. This OBR product family uses a 5.44-inch housing and should not be ordered for a 4.8-inch application. Then measure or verify the required driveshaft length: 20-inch L, 25-inch XL or 30-inch XXL.
Rotation must also match the original configuration. Both standard and counter-rotation versions are offered, but engine position alone is not sufficient proof of rotation. Check the existing unit or engine documentation.
Finally, choose new or remanufactured condition and compare the selected SKU with the compatibility table. Submit the complete engine serial and model numbers so the configuration can be reviewed before shipment. If any ratio, housing, shaft or rotation detail is uncertain, request a fitment check before placing the order.
Use CTRL + F or search below to find your engine model
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The product information made it easy to confirm the correct SE216 configuration needed for a Mercury Verado Inline-6 application. The 1.85:1 gear ratio, 5.44″ heavy-duty gearcase diameter, and serial-number requirements were clearly explained. Buyers should verify their bullet size and gear ratio instead of ordering by horsepower alone.
I appreciated that the Verado L6 5.44″ gearcase options were clearly distinguished from smaller 4.80″ models. The 25-inch shaft option, 1.85:1 ratio, and engine serial-number guidance made selecting the replacement unit straightforward. Confirming the exact gear housing diameter before ordering is key.
The product page clearly detailed the 5.44″ torpedo diameter requirement and 1.85:1 ratio for heavy-duty Verado L6 outboards. The 20-inch shaft, SE216 unit was simple to identify. The fitment details saved a lot of headache compared to guessing.
The most important detail for this replacement lower unit was matching the 1.85:1 gear ratio and 5.44″ heavy-duty gearcase size. The page made it easy to cross-reference my engine year and serial number. I recommend double-checking your current prop shaft and gearcase dimensions first.
The Verado L6 specific guidance ensured I received the correct 1.85:1 ratio lower unit with the 5.44″ gearcase setup. Arrived well-packaged in a wooden crate with zero damage. Serial-number verification with customer support prior to shipment made installation hassle-free.
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