862998 18 7701 Idle Air Control Valve IAC for MerCruiser MPI V6 V8 5.0 5.7L 4.3L

Product Overview

This Idle Air Control Valve (IAC) regulates engine idle speed by controlling air bypass around the throttle plate. Designed for MerCruiser MPI marine engines, this IAC valve ensures smooth idle and responsive throttle operation. It is a direct replacement for worn or faulty idle air control valves in MerCruiser V6 and V8 applications.

Key Features & Performance

• Direct replacement for MerCruiser MPI engines with part numbers 862998 and 18-7701
• Precision-machined pintle and housing for accurate air metering
• Corrosion-resistant construction suitable for marine environments
• Factory-calibrated for plug-and-play installation
• Restores proper idle speed and reduces stalling or surging

Fitment & Compatibility

• MerCruiser MPI V6 4.3L engines
• MerCruiser MPI V8 5.0L and 5.7L engines
• Replaces OEM part numbers 862998 and 18-7701

Common Uses

• Replacing a failed idle air control valve on MerCruiser sterndrive or inboard engines
• Resolving erratic idle, stalling, or poor throttle response in marine MPI systems
• Marine engine maintenance and repair on boats with MerCruiser power plants

Technical Specifications

• Part Number(s): 862998, 18-7701
• Type: Idle Air Control Valve (IAC)
• Compatible Fuel System: MerCruiser MPI

Frequently Asked Questions

Q: Will this IAC valve fit a MerCruiser 5.0L MPI engine? A: Yes, this IAC valve is compatible with MerCruiser 5.0L MPI V8 engines using part numbers 862998 or 18-7701.

Q: Do I need to calibrate the valve after installation? A: No calibration is required; the valve is pre-calibrated and will work with the engine’s ECM after a simple idle relearn procedure.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.