Description
Mercury 150 HP Outboard Lower Unit – OEM #8M0099218 | Four Stroke Long Shaft
Upgrade or replace your damaged drive with the Mercury 150 Outboard Lower Unit OEM #8M0099218 – a factory-original Mercury Marine part designed specifically for 150 HP Four Stroke outboards with a long shaft. Unlike aftermarket alternatives, this genuine Mercury 150 lower unit guarantees precision fit, factory performance, and long-term durability for your engine.
Whether you’re looking for a lower unit for Mercury 150 Four Stroke, a Mercury 150 Optimax lower unit, or even a replacement for a Mercury 150 Black Max lower unit, this OEM assembly provides a direct-fit solution built to handle demanding marine environments.
Perfect for restoring smooth shifting, reliable power delivery, and long-lasting protection, this Mercury 150 HP 4-Stroke lower unit offers superior quality at a value-driven price.
Features & Benefits:
Fits Mercury Outboards 150 HP Four Stroke – Long Shaft
OEM Part Number: 8M0099218
100% Factory OEM Mercury Lower Unit (not aftermarket)
Precision-engineered for smooth gear shifting & reliability
Covered by a 1-Year Mercury OEM Warranty
Pricing
- Retail Price: $4,535
- Our Price: $4,195 → Save $340
- Ask about available XL Units – Call or Email for details
Product Finish:
- Factory OEM Mercury Marine finish
- Built to OEM standards – ready to install
- Designed for long-lasting performance in freshwater & saltwater
Mercury OEM Unit: Core Rebate Information
- Return your old core, get up to $340 back
- Rebate amount will vary based on the condition of your core
Recycle your core- keep boat parts out of the landfill
Useful Resources
- 🔍 How to find your Boat Engine serial number?
- Still deciding? Watch our YouTube video How to avoid common lower unit replacement mistakes
- To help extend the life of your gearcase, check out our Boat Maintenance Checklist






Reviews
There are no reviews yet.