Lower Unit Assy (Short) for Yamaha 4-Stroke 15HP 20HP Outboard Motors F15SEHA

Lower Unit Assy (Short) for Yamaha 4-Stroke 15HP 20HP Outboard Motors

This short-shaft lower unit assembly is a complete gearcase replacement that houses the driveshaft, gears, and water pump to restore propulsion on Yamaha 4-stroke 15HP and 20HP outboards.

Overview

This lower unit assembly fits Yamaha 4-stroke 15HP and 20HP outboard motors and delivers the gearcase function that turns engine power into forward and reverse thrust. It is built for boaters replacing a damaged or worn gearcase who want a direct-fit short shaft unit for the F15SEHA and similar models. The complete lower unit assembly saves time over sourcing individual internal components.

Built For Performance

• Short shaft configuration suited to select transom heights
• Complete assembly with housing, driveshaft, and gearing pre-installed
• Sealed gearcase designed to hold lubricant and keep water out
• Integrated water pump housing for engine cooling
• Corrosion-resistant finish for saltwater and freshwater use

Fits These Machines

• for Yamaha 4-Stroke 15HP outboard (F15SEHA)
• for Yamaha 4-Stroke 20HP outboard

On-The-Job Use

• Restoring propulsion on boats with a failed gearcase
• Freshwater and saltwater trolling and cruising
• Replacing a cracked or corroded lower unit housing
• Servicing gearcase damage from impact with underwater objects

Specs At A Glance

Good To Know

Q: Is the water pump included with this lower unit? A: The assembly is supplied as a complete unit, so confirm the listing details for water pump inclusion before ordering. Always verify the housing and pump match your motor's model and year.

Q: How do I confirm this short shaft fits my outboard? A: Check your engine model code, such as F15SEHA, and the shaft length on your existing motor before purchase. Serial number and model year can affect compatibility, so compare carefully.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.