Sierra 18-7705 Idle Air Control (IAC) Motor for Volvo Penta Marine Engines

The Sierra 18-7705 Idle Air Control (IAC) Motor is a precision-engineered marine replacement part designed for Volvo Penta fuel-injected inboard and sterndrive engines. As a critical component of the electronic fuel injection system, the IAC motor regulates engine idle speed by precisely controlling airflow to the throttle body, ensuring smooth and stable engine operation at low RPM.

Key Features:

• Direct OEM replacement for Volvo Penta IAC motors
• Engineered to meet or exceed original equipment specifications
• Designed for the demands of the harsh marine environment
• Features a multi-pin electrical connector for secure, factory-fit installation
• Direct bolt-on replacement — no modifications required
• Helps restore stable idle by precisely managing throttle body airflow

Replaces OEM Part Numbers:

• Volvo Penta: 3843751, 3857696

Compatible Engine Families: Volvo Penta 4.3L, 5.0L, 5.7L, 8.1L, and 8.2L MPI marine engines including GL, GXI, GI, GIL, GXIL, OSI, and OSXI series configurations.

Sierra International is a trusted supplier to OEM engine manufacturers and boat builders, delivering quality marine parts engineered to stand up in demanding marine conditions. The Sierra 18-7705 is an ideal solution for restoring smooth idle performance on high-hour engines where the original idle air control motor has worn or failed.

California Residents: WARNING — Cancer and Reproductive Harm. For more information, visit P65Warnings.ca.gov.