Sierra 18-7632-1 Idle Air Control Motor for 5.7L 350 V-8 EFI Marine Engines

The Sierra 18-7632-1 Idle Air Control Motor is an electronic idle air control (IAC) motor built for 5.7L 350 cubic-inch V-8 EFI marine engines. It regulates the small amount of air that bypasses the throttle plate to maintain a stable idle speed as engine load and temperature change, a function that is critical on EFI-equipped inboard and sterndrive engines where idle quality directly affects starting, warm-up, and low-speed maneuvering. Sierra engineers this part to meet or exceed the specifications of the original equipment component it replaces, and Sierra supplies parts to OEM engine manufacturers and boat builders, so the 18-7632-1 is built to the same fit, form, and function expected on the water.

The motor measures 10.7 inches in length with a 1.2 inch outside diameter and a 0.6 inch nominal wall thickness, and it is finished in white. It is designed as a direct-fit replacement for the 5.7L EFI, 5.7L EFI GEN+, 5.7L EFI MIE GEN+, and 5.7LX Bravo EFI GEN+ engine families covered below, matching the mounting and electrical interface of the factory idle air control motor on these applications.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7632-1
• Product Type: Idle Air Control Motor
• Color: White
• Length: 10.7 inches
• Width: 1.2 inches
• Outside Diameter: 1.2 inches
• Nominal Wall Thickness: 0.6 inches
• Weight: 0.24 pounds
• UPC: 808282374457
• Engine Displacement: 5.7L 350 cubic inch V-8

Fitment

• 5.7L EFI, 1995-1997, serial range F225560 - K999999
• 5.7L EFI (GEN +), 1998-2001, serial range L010035 - M299999
• 5.7L EFI MIE (GEN +), 1997, serial range K040300 - K999999
• 5.7LX Bravo EFI (GEN +), 1996-1997, serial range F800300 - K999999
• 5.7LX EFI, 1995-1997, serial range F225560 - K999999

Frequently Asked Questions

What engines does the Sierra 18-7632-1 idle air control motor fit? The 18-7632-1 fits 5.7L 350 cubic inch V-8 EFI engines, specifically the 5.7L EFI (1995-1997, serial F225560 - K999999), 5.7L EFI GEN+ (1998-2001, serial L010035 - M299999), 5.7L EFI MIE GEN+ (1997, serial K040300 - K999999), 5.7LX Bravo EFI GEN+ (1996-1997, serial F800300 - K999999), and 5.7LX EFI (1995-1997, serial F225560 - K999999).

How do I know if this part fits my engine by serial number? Check your engine's serial number against the ranges listed for the 18-7632-1: F225560 - K999999 for the 1995-1997 5.7L EFI and 5.7LX EFI, L010035 - M299999 for the 1998-2001 5.7L EFI GEN+, K040300 - K999999 for the 1997 5.7L EFI MIE GEN+, and F800300 - K999999 for the 1996-1997 5.7LX Bravo EFI GEN+.

What does an idle air control motor do? It regulates the amount of air bypassing the throttle plate to keep engine idle speed stable as load and temperature change. On the 5.7L 350 V-8 EFI engines this part fits, a failing idle air control motor typically causes a rough, high, or stalling idle.

What color and finish is the 18-7632-1? The Sierra 18-7632-1 idle air control motor is finished in white.

What are the dimensions of this idle air control motor? The 18-7632-1 measures 10.7 inches in length with a 1.2 inch outside diameter and a 0.6 inch nominal wall thickness.

How much does the Sierra 18-7632-1 weigh? This idle air control motor weighs 0.24 pounds.

Is the Sierra 18-7632-1 a genuine OEM part or aftermarket? The 18-7632-1 is a Sierra-branded replacement part engineered to meet or exceed the specifications of the original equipment idle air control motor it replaces, rather than a part sold under the original engine manufacturer's brand.

Does this idle air control motor fit Bravo drive applications? Yes, the 18-7632-1 covers the 5.7LX Bravo EFI GEN+ application for 1996-1997, serial range F800300 - K999999, in addition to the non-Bravo 5.7L EFI applications.

What is included when I order the 18-7632-1? Each order includes one Sierra 18-7632-1 idle air control motor.

Is the 18-7632-1 the same part for MIE engines? Yes, the same 18-7632-1 idle air control motor is listed for the 5.7L EFI MIE GEN+ engine application, 1997 model, serial range K040300 - K999999.

What UPC is associated with this part? The Sierra 18-7632-1 idle air control motor has UPC 808282374457.