Looking for a reliable lower unit replacement for Mercury outboards? This remanufactured gearcase fits a wide range of Mercury models including 3 & 4-cylinder engines, covering 70–125 HP 2-Stroke and 75–115 HP 4-Stroke engines with serial numbers OT801000 and below. It’s an ideal solution for those searching for a Mercury lower unit interchange chart, Mercury 115 lower unit, or Mercury 125 lower unit alternatives.

Compatible with engine years from 1987 through present, this aftermarket non-OEM part is engineered for durability and performance. Backed by a 3–Year FAULT-FREE Warranty, it’s trusted by boaters seeking outboard lower unit replacement options without breaking the bank.

Whether you’re exploring the Mercury marine 115 HP 4-cylinder lower unit or other configurations, this unit provides a dependable fit and performance for most Mercury applications as stated above. 

View our parts finder to find Mercury Outboard parts diagrams to verify this is a match or contact us using the buttons at the bottom of the page.

You can also use our parts finder to find other Mercury Boat Parts for your Mercury Outboard.

Get the right lower unit for your outboard when you call us today. Take the guess work out of ordering online.