Mercury 40, 50 & 60HP 4-Stroke IAC Valve (877805T)

Ensure smooth engine idle and reliable low-speed performance with this high-quality Mercury 40, 50 & 60HP 4-Stroke IAC Valve (Idle Air Control Valve). Specifically designed for Mercury 4-stroke outboards in the 40HP, 50HP, and 60HP range, this component plays a crucial role in maintaining proper airflow when the throttle is closed or during idle conditions.

The IAC Valve is responsible for regulating the amount of air that bypasses the throttle plate, allowing your engine to idle smoothly, compensate for cold starts, and adjust idle RPMs during various load conditions. A faulty IAC valve can cause stalling, rough idle, fluctuating RPMs, or poor throttle response—especially noticeable when shifting into gear or starting the engine.

This is built to OEM specifications for a perfect fit and dependable performance. It features corrosion-resistant housing, a reliable actuator mechanism, and a plug-and-play connection for easy replacement. Whether you’re replacing a failed valve or performing preventative maintenance, this part will help restore idle stability and protect your engine’s long-term reliability.

Common Symptoms of a Failing IAC Valve:

• Engine stalls at idle

• Rough or high idle speed

• Hard starts, especially cold

• Check engine light or error codes

• Poor throttle transition from idle

Compatible With:

• Mercury 40HP 4-Stroke

• Mercury 50HP 4-Stroke

• Mercury 60HP 4-Stroke

Features:

• Direct OEM-style replacement

• Restores smooth idle & RPM control

• Durable, corrosion-resistant design

• Easy installation with factory connectors

• Essential for clean emissions and stable performance

Keep your engine idling perfectly and avoid unnecessary wear with the Mercury 40, 50 & 60HP 4-Stroke IAC Valve—an essential part for smooth, reliable boating.

Follow us on Facebook, Instagram and Youtube.

Terms & Conditions | Returns & Exchanges | Privacy Policy