Mercury Lower unit L4 4 cylinder 3 & 6 JAW 110-125HP years 1988-2006

Mercury 110/115/125HP 3 JAW/125HP 6 JAW (4 Cyl.) "L4" Lower Unit years 1988-2006

These are New and Remanufactured outboard lower units (gearcases) for Mercury/Mariner 4-cylinder 2-stroke engines in the 110hp, 115hp, and 125hp range from 1988 to 2006 (including "L4" series with 3-jaw clutch for earlier models and 6-jaw for later 125hp variants). Rebuilt with all new bearings, seals, gears, and updated parts—these units often provide better-than-OEM durability and performance.

Key Features and Specs:

• Clutch Type: 3 Jaw (typically 1988-1997 models) or 6 Jaw (typically 1998-2006 125hp models—confirm via serial for exact match).
• Propeller Shaft: 15 splines (standard for these 110-125hp 4-cylinder "L4" gearcases; compatible with most props—recommend Flo-Torq hub kit where applicable for optimal performance).
• Water Pump: Included (not pre-installed—install during setup, add gear oil, and the unit is ready).
• Drive Shaft: Not included—reuse your existing drive shaft (snaps in on these models; typically 13 splines). Contact us if a replacement is needed.
• Warranty: Comes with a 2-year manufacturer warranty. A 12-month extended warranty is available for an additional $438.
• Core Policy: No core charge required, and no core value/credit if an old unit is returned.

Important Selection Tip: To ensure precise fitment (shaft length, rotation—standard or counter-rotating—clutch type like 3-jaw vs. 6-jaw, and exact model/year compatibility), please provide the serial number and model number from your motor's transom bracket. This is essential for matching these classic Mercury/Mariner "L4" 4-cylinder gearcases accurately.

Availability: These units are normally not stocked in-store and ship directly from the manufacturer. Contact us for current pricing, stock, lead times, and any add-ons (extended warranty, drive shaft, etc.).

Available Configurations and Shaft Lengths (Contact us for exact pricing, availability, and upcharges):

If you have questions, need help verifying compatibility, or want quotes on related parts (e.g., drive shaft, gear lube kit, Flo-Torq hub), email us at jhawknz@gmail.com or call 615-691-1433—we're happy to assist with your purchase!

About Us: Hawkeye Marine, LLC—located in La Vergne, Tennessee—is your trusted source for high-quality marine parts. As a dealer for industry leaders like OBR Parts and Marine (established 1982), we deliver top-tier remanufactured and new outboard components with expert technical support, prompt shipping, and nationwide service for marine dealers and boaters alike.