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Required for fitment review to confirm compatibility.
This OBR Mercury Verado 135–200 HP lower unit family is intended for selected 1.7L inline-four supercharged Verado four-stroke outboards. Available configurations include new and remanufactured gearcases with 20-inch L or 25-inch XL driveshaft lengths. Standard-rotation and counter-rotation options are available, depending on the selected ME-G4 SKU.
Select ME-G4-11 for a standard-rotation 20-inch configuration, ME-G4-12 for a standard-rotation 25-inch configuration or ME-G4-13 for a counter-rotation 25-inch configuration. New products use the -N suffix, while remanufactured products use the -R suffix.
Horsepower and external appearance cannot confirm fitment. Before ordering, verify that the engine is a supercharged 1.7L inline-four Verado and confirm the complete engine model, serial number, original 2.08:1 ratio, driveshaft length and rotation. SEI SE90-221 is a separate product family and is not an alternate part number for these OBR ME-G4 variants.
Verado Optimized: Tailored to the 135, 150, 175, and 200 HP 4-Cylinder Supercharged platform.
Hydrodynamic Bullet: Designed for reduced drag and improved fuel economy at cruising speeds.
Saltwater Protection: Coated with a high-grade marine finish for superior corrosion resistance.
Confirm all of the following before ordering:
SKU mapping:
Supplier catalogs differ on whether this family ends with the 2018 or 2019 model year. A complete engine serial number is therefore required, particularly for a 2019 application.
Before dispatch, the selected SKU should be reviewed against the engine model and serial information supplied with the order. If the information is incomplete or conflicts with the selected shaft length, rotation or configuration, the shipment should be paused and the customer contacted for clarification.
The shipping carton, internal protection and SKU label should be inspected before release to the carrier. The shipment record should confirm that the packed SKU matches the customer’s selected new or remanufactured configuration. Do not publish a pre-shipment testing claim unless the exact inspection or testing process is documented.
The customer should be informed that the gearcase ships without gear oil and must be filled with the engine manufacturer’s required lubricant before installation or operation. Any dry-shipping notice supplied by OBR should remain visible inside the package and in the shipment communication.
Once the order has cleared the fitment and packaging review, tracking information should be provided using the contact details submitted at checkout. The customer should verify the delivery address, monitor the carrier’s tracking updates and arrange to receive the shipment when required. Address changes should be requested before carrier pickup because post-dispatch changes may cause delays or additional fees.
When the shipment arrives, inspect the carton for punctures, crushing or water exposure. Photograph visible damage, retain the carton and packing materials, and report shipping damage before installation. Do not install or operate a visibly damaged, incorrect or mislabeled shipment.
| Specification | Mercury Verado Lower Unit 4 Cyl | 135–200 HP | 2006–2018 |
|---|---|
| Manufacturer | OBR Parts & Marine |
| Compatible Engine Brand | Mercury |
| Product Family | OBR ME-G4-11, ME-G4-12 and ME-G4-13 |
| Product Type | Replacement lower unit / gearcase |
| Conditions | New and remanufactured |
| Engine Family | Selected 1.7L inline-four supercharged Mercury Verado four-strokes |
| Horsepower | 135 HP, 150 HP, 175 HP and 200 HP |
| Years | 2006–2018 is listed by one OBR catalog; other OBR dealer listings extend through 2019. VERIFY 2019 BEFORE PUBLISHING and require serial verification. |
| Gear Ratio | 2.08:1 for the supported 1.7L inline-four Verado application; confirm the original ratio before shipment |
| Driveshaft | 20-spline application; confirm against the selected OBR SKU |
| Propeller Shaft | 15-spline application; confirm against the selected OBR SKU |
| Gearcase Style | 4.8-inch torpedo family; matching application is approximately 4.88 inches |
| Standard Rotation | ME-G4-11 for 20-inch L and ME-G4-12 for 25-inch XL |
| Counter Rotation | ME-G4-13 for 25-inch XL |
| Shaft Options | 20-inch L and 25-inch XL; counter rotation is currently listed only in 25-inch XL |
| New SKUs | ME-G4-11-N, ME-G4-12-N and ME-G4-13-N |
| Remanufactured SKUs | ME-G4-11-R, ME-G4-12-R and ME-G4-13-R |
| Gear Lubricant | Ships without gear oil; fill with the manufacturer-required lubricant before operation |
| Warranty | OBR two-year limited warranty, subject to written terms |
| Major Exclusions | Non-Verado inline-four engines, inline-six Verado, later V6/V8 Verado, 5.44-inch gearcases, Torque Master, Torque Master 2, Sport Master and mismatched rotation |
Start by confirming the engine architecture, not just the horsepower. This replacement family is intended for selected Mercury Verado 135, 150, 175 and 200 HP engines using the supercharged 1.7L inline-four platform. Similar-looking non-Verado inline-four engines and later inline-six, V6 or V8 Verado models require different gearcases.
Next, match the driveshaft length and rotation. ME-G4-11 is the standard-rotation 20-inch L configuration. ME-G4-12 is the standard-rotation 25-inch XL configuration. ME-G4-13 is the counter-rotation 25-inch XL configuration. Do not select rotation based only on where the engine is mounted on a multi-engine boat.
Confirm the original 2.08:1 ratio and applicable spline configuration before installation. Then select new or remanufactured condition. New SKUs end in -N, while remanufactured SKUs end in -R.
Finally, submit the complete engine model and serial number. Supplier catalogs differ on the final supported model year, making serial-number verification especially important for a 2019 application.
Use CTRL + F or search below to find your engine model
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The product information made it easy to verify fitment for my 2008 Mercury Verado 175 HP 4-cylinder. Checking the 2.08:1 gear ratio, 20-inch shaft length, and serial range prior to ordering made all the difference. Shifts smoothly and performs perfectly.
I appreciated that the Verado 135–200 HP 4-cylinder options were clearly separated from 6-cylinder models. Mariners Warehouse fitment support checked my serial number and confirmed the 2.08:1 ratio before shipping, saving me potential headaches.
The unit arrived well-protected in custom foam packaging. The drive shaft splines, shift linkage, and 25-inch shaft length aligned seamlessly on my 2011 150 HP L4 Verado. Followed the break-in procedures and it runs quietly.
Matching the gear ratio and 4.80-inch torpedo bullet diameter was simple. The gearcase operates smoothly on the water, though removing the shipping bracket required extra care during installation.
Replaced a damaged gearcase on my 200 HP 4-cylinder Verado. The product listing clearly detailed shaft length and gear ratio parameters. After filling with high-performance gear lubricant, it has performed reliably for months.
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