Description
New MerCruiser Gen II Lower Unit – Up to 300 HP – OEM #815822A43
This new MerCruiser Gen II lower unit is a direct-fit replacement for MerCruiser Gen 2 sterndrives rated up to 300 horsepower, covering model years from 1991 through 2010. Built with durable aftermarket components (non-OEM), it ensures a strong, cost-effective solution for restoring power and performance to your sterndrive system.
Compatible with models using OEM part number 815822A43, this Gen II gearcase incorporates the latest-style speedometer fitting (OE# 860382) — please note that this part is not included and must be sourced separately for full speedometer functionality.
This unit is finished in black, professionally built, and ready to install. Whether you’re upgrading a worn-out drive or replacing a damaged gearcase, this is a reliable and economical solution for MerCruiser Gen II sterndrives.
Pricing
Total Price: $1,065
Less $200 Core Rebate
Final Price: $865
Product Finish:
- 100% brand-new aftermarket (non-OEM)
- Smooth black finish
- Not remanufactured
Core Rebate Information
- Return your old core, get up to $200 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
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