The OBR ME-P8F-40-R remanufactured long block is designed for select 2018-2026 Mercury 4.6L V8 EFI 250-300 HP four-stroke outboards. It provides a professionally remanufactured replacement for compatible engines requiring major internal engine repair without replacing the complete outboard.
Long Block At a Glance
| Years: 2018-2026 | Engine: Mercury 4.6L V8 |
| Horsepower: 250 / 300 HP | Engine Type: EFI Four-Stroke |
| Included: Base Gasket | Warranty: 2 Years |
| Core Charge: None | Core Refund: Up to $400 |
Engine Serial Number Required Before Fulfillment
Mercury V8 applications can vary by model and serial number. Please provide your engine serial number when ordering. We will use it to confirm that ME-P8F-40-R is correct for your application before the long block is fulfilled.
Fitment
- 2018-2026 Mercury four-stroke outboards
- 4.6L V8 EFI
- 250 HP
- 300 HP
What's Included
- OBR remanufactured long block assembly
- Base gasket
OBR Remanufacturing Process
OBR's remanufacturing process begins with a used engine core that is completely disassembled, cleaned, and inspected. Components are checked for condition and specifications, and parts that do not meet requirements are replaced during the remanufacturing process. OBR long blocks are assembled with the cylinder heads installed and timed on the short block and are built to meet OE specifications.
Core Return — Up to $400 Refund
There is no additional core charge added to your purchase.
Core return paperwork will be included with your order. If your original long block is returned and passes inspection as an acceptable rebuildable core, you may receive a refund of up to $400. The final refund amount is based on the condition and acceptance of the returned core.
2-Year OBR Limited Warranty
This remanufactured long block includes the OBR/Red Rhino 2-Year Limited Warranty.
An extended warranty is also available for purchase, adding one additional year of warranty coverage.
Frequently Asked Questions
Will this long block fit my Mercury 4.6L V8?
Fitment must be confirmed by engine serial number. Send us your serial number and we will verify the application before fulfillment.
Does this long block include a base gasket?
Yes. A base gasket is included with the long block.
Do I have to pay a core charge?
No. There is no additional core charge. Returning an accepted rebuildable core may qualify you for a refund of up to $400.
Can I extend the warranty?
Yes. The included warranty is two years, and an optional extended warranty can be purchased to add one additional year of coverage.
Does the long block require a break-in period?
Yes. Proper installation and break-in procedures are important for a remanufactured four-stroke engine. Follow OBR's installation, break-in, and warranty requirements after installation.
Questions About This Long Block?
Need help confirming fitment or have a question before ordering? Email us at customerservice@marinepartswarehouse.com with your engine model and serial number, and our team will be happy to help with any information we have available.
