Starter Solenoid for Mercury 3 Cyl 4 Stroke 25 2006-2021

Starter Solenoid for Mercury

This starter solenoid is an electrical relay that delivers battery current to the starter motor on Mercury 3-cylinder 4-stroke outboard engines, engaging the starter when the key is turned.

Overview

This starter solenoid serves Mercury 3-cylinder 4-stroke outboard engines as the high-current relay between the battery and the starter motor. When the ignition key is turned, the starter solenoid closes the main circuit so the starter can crank the engine. It is a direct-fit replacement part for riders and mechanics servicing Mercury 25 hp four-stroke outboards built from 2006 through 2021.

Built For Performance

• Heavy-duty internal contacts rated for repeated high-current starting cycles
• Sealed housing resists moisture, salt spray, and fuel vapor in marine environments
• Coil winding engineered for reliable engagement at low battery voltage
• Corrosion-resistant terminals for dependable electrical contact
• Direct-fit mounting pattern for the Mercury 3-cylinder 4-stroke platform

Fits These Machines

• for Mercury 25 hp 3-cylinder 4-stroke outboard, 2006-2021

On-The-Job Use

• Replacing a failed or clicking solenoid on a Mercury 25 hp four-stroke
• Routine electrical maintenance on outboard starting systems
• Repowering or restoring older Mercury 3-cylinder four-stroke engines
• Keeping a spare onboard for remote launches and long runs

Specs At A Glance

Good To Know

Q: How can I tell if my starter solenoid has failed? A: A single loud click with no crank, or no sound at all when the key turns, often points to a bad solenoid. Testing the small control terminal for voltage while cranking helps confirm the diagnosis.

Q: Does this solenoid come with mounting hardware? A: It is supplied as the solenoid unit itself. Reuse the original bolts and electrical connectors unless they show corrosion or damage.

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