SKU: 52081004584

Idle Air Control (IAC) Motor – Fits Volvo Penta 4.3/5.0/5.7 GXI Engines (Replaces 3843751, 3857696)

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Description

Idle Air Control (IAC) Motor – Fits Volvo Penta 4.3/5.0/5.7 GXI Engines (Replaces 3843751, 3857696)Idle Air Control (IAC) Motor Fits Volvo Penta 4. 3 5. 0 5. 7 GXI Engines This Idle Air Control (IAC) motor is a direct fit replacement for a wide range of Volvo Penta 4. 3L, 5. 0L, and 5. 7L GXI, OSi, and related V6 V8 marine engines. It is engineered to regulate the engine's idle speed by controlling the amount of air bypassing the throttle plate, ensuring smooth and stable operation. This component is a direct replacement for Volvo Penta part

Idle Air Control (IAC) Motor – Fits Volvo Penta 4.3/5.0/5.7 GXI Engines

This Idle Air Control (IAC) motor is a direct-fit replacement for a wide range of Volvo Penta 4.3L, 5.0L, and 5.7L GXI, OSi, and related V6/V8 marine engines. It is engineered to regulate the engine's idle speed by controlling the amount of air bypassing the throttle plate, ensuring smooth and stable operation.

This component is a direct replacement for Volvo Penta part numbers 3843751 and 3857696, as well as several aftermarket equivalents. It is also compatible with select MerCruiser engine models.

  • Installation: Designed for a direct bolt-on fit.
  • Fuel Type: Compatible with gasoline engines.
  • Function: Regulates engine idle speed for electronic fuel injection systems.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Volvo Penta 3843751
Volvo Penta 3857696
Sierra 18-7705
Regitar RMS002

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke OEM Part No. Notes
Volvo Penta 4.3GXi-B, 4.3GXi-BF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-C, 4.3GXi-CF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-D, 4.3GXi-DF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-E, 4.3GXi-EF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-F, 4.3GXi-FF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-G, 4.3GXi-GF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-J, 4.3GXi-JF 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-P, 4.3GXi-Q 4-Stroke 3843751/3857696
Volvo Penta 4.3GXi-225-R 225 4-Stroke 3843751/3857696
Volvo Penta 4.3Gi-200-R 200 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-B, 4.3OSi-BF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-C, 4.3OSi-CF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-D, 4.3OSi-DF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-E, 4.3OSi-EF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-F, 4.3OSi-FF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-G, 4.3OSi-GF 4-Stroke 3843751/3857696
Volvo Penta 4.3OSi-J, 4.3OSi-JF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-B, 5.0GXi-BF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-C, 5.0GXi-CF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-D, 5.0GXi-DF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-E, 5.0GXi-EF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-F, 5.0GXi-FF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-G, 5.0GXi-GF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-J, 5.0GXi-JF 4-Stroke 3843751/3857696
Volvo Penta 5.0GXi-N 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-B, 5.0OSi-BF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-C, 5.0OSi-CF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-D, 5.0OSi-DF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-E, 5.0OSi-EF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-F, 5.0OSi-FF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-G, 5.0OSi-GF 4-Stroke 3843751/3857696
Volvo Penta 5.0OSi-J, 5.0OSi-JF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-B, 5.7Gi-BF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-C, 5.7Gi-CF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-D, 5.7Gi-DF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-E, 5.7Gi-EF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-F, 5.7Gi-FF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-G, 5.7Gi-GF 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-300-J, 5.7Gi-300-JF 300 4-Stroke 3843751/3857696
Volvo Penta 5.7Gi-300-N 300 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-C, 5.7GXi-CF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-D, 5.7GXi-DF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-E, 5.7GXi-EF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-F, 5.7GXi-FF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-G, 5.7GXi-GF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-H, 5.7GXi-HF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-J, 5.7GXi-JF 4-Stroke 3843751/3857696
Volvo Penta 5.7GXi-N 4-Stroke 3843751/3857696
Volvo Penta V6-200-A 200 4-Stroke 3843751/3857696
Volvo Penta V6-225-A 225 4-Stroke 3843751/3857696
MerCruiser 350 MAG MPI 4-Stroke Compatibility cited by FridayParts
MerCruiser BLACK SCORPION SKI 4-Stroke Compatibility cited by FridayParts
MerCruiser 377 SCORPION MCM & SKI 4-Stroke Compatibility cited by FridayParts
MerCruiser MX 6.2L MPI 4-Stroke Compatibility cited by FridayParts
MerCruiser 7.4L MPI (L29) 4-Stroke Compatibility cited by FridayParts
MerCruiser 575 SCi 4-Stroke Compatibility cited by FridayParts

Technical Specifications

Specification Value
Product Type Idle Air Control (IAC) Motor
Installation Direct bolt-on replacement
Fuel Type Gasoline
Connection Multi-pin electrical connector
Other Technical Attributes Electronic fuel injection component that regulates idle speed

Package Contents

1 x Idle Air Control (IAC) Motor (Replaces 3843751/3857696)

Installation Guide

  1. Safety First: Begin by disconnecting the boat's battery to prevent any electrical shorts.
  2. Locate the IAC Motor: Find the existing Idle Air Control motor, which is typically mounted on the throttle body assembly of the engine.
  3. Disconnect Electrical Connector: Carefully unclip and disconnect the multi-pin electrical harness from the old IAC motor.
  4. Remove Mounting Screws: Use an appropriate screwdriver or socket to remove the screws holding the motor in place.
  5. Remove Old Motor: Gently pull the old IAC motor away from the throttle body. Note its orientation.
  6. Clean Surface: Clean the mounting surface and port on the throttle body to ensure a good seal with the new motor.
  7. Install New Motor: Position the new IAC motor and secure it with the original mounting screws. Do not overtighten.
  8. Reconnect Connector: Securely plug the electrical connector back into the new motor until it clicks.
  9. Reconnect Battery: Reconnect the boat's battery terminals.
  10. Test Operation: Start the engine and let it run for a few minutes. Check for a stable idle speed. The engine's ECU may need time to relearn the idle position.

Troubleshooting & FAQ

Q: How do I know if this IAC motor fits my Volvo Penta engine?
A: This motor is designed for 4.3, 5.0, and 5.7 GXI and OSi series engines. The best way to confirm is to match your original part number to one of the cross-references listed: 3843751, 3857696, Sierra 18-7705, or Regitar RMS002. Please check the detailed compatibility table to verify your specific model is listed.

Q: What are the signs of a failing Idle Air Control motor?
A: Common symptoms include an irregular or high idle, engine stalling at low speeds, and difficulty starting. The check engine light may also illuminate with a related trouble code. A faulty IAC can prevent the engine from maintaining the correct RPM at idle.

Q: Do I need a special tool to install this part?
A: No special tools are required for most installations. The replacement can typically be done with basic hand tools like a screwdriver or socket set to remove the mounting screws and a small pick or flathead to help release the electrical connector clip if it's stubborn.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 52081004584

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Reviewed in the United States on May 14, 2026
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Natrona Heights, US
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Good Fit Out of the Box
Size: 9, Color: Black
The shoes came with the correct size and is a good fit. They were originally pretty stiff, but are much better now after breaking them in. They look good. but as other's have said, they are made of synthetic leather and in my opinion have kind of a plastic look to them. The quality is good with ridged rubbber soles. I thought they were kind of expensive, but then again I haven't purchased these type of shoes in a while. A family member told me that if they were real leather, they would have been a lot more expensive. For what the shoes are I would recommend the purchase.
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Mar Ronquillo
Draper, US
★★★★★ 3
I wanted to love these
Size: 9, Color: Black Leather
These are very good looking in person, especially the buckles and the pop of red on black. Alas, I have another pair of Marc Joseph shoes to compare comfort and fit, and this pair simply hurts my feet.
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Great shoes
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These are great. We buy them again and again
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K 8bro
New York, US
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Fit over a rather large bunion!
Size: 13 Wide, Color: Mocha Grainy Leather
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