Mercury 8M0188118 Sensor IAC Valve

Mercury 8M0188118 Idle Air Control Valve

The Mercury 8M0188118 Idle Air Control Valve is a genuine OEM replacement IAC valve for select Mercury 4-Stroke EFI outboards and compatible Vazer applications. The idle air control valve helps regulate idle speed by controlling airflow through the engine’s intake system where specified by the Mercury parts diagram.

Replacing a worn or faulty IAC valve can help correct idle quality issues, stalling, hard starting, or inconsistent low-speed operation on compatible Mercury EFI engines. This genuine Mercury replacement part supersedes Mercury part number 897526T.

Product Features:

• Genuine OEM Mercury idle air control valve
• Designed for select Mercury 4-Stroke EFI outboard applications
• Helps regulate engine idle speed and low-speed airflow
• Useful when servicing idle quality, stalling, or low-speed running issues
• Direct replacement where part number 8M0188118 is specified
• Supersedes Mercury 897526T
• Built to Mercury Marine fit, function, and performance standards

Product Details:

• Brand: Mercury
• Manufacturer Part Number: 8M0188118
• Previous / Superseded Part Number: 897526T
• Part Type: Idle Air Control Valve
• Abbreviation: IAC Valve
• Application: Select Mercury EFI outboards and Vazer engines

Fits Select Mercury Applications:

• 65 HP EFI Jet, serial number 2B095049 and up
• 75 HP EFI, serial number 1B366823 through 2B094995
• 80 HP EFI, serial number 1B366823 through 2B094995
• 90 HP EFI, serial number 1B366823 through 2B094995
• 100 HP EFI, serial number 1B366823 through 2B094995
• 115 HP EFI, serial number 1B366823 through 2B094995
• 75 HP EFI, serial number 2B095049 and up
• 80 HP EFI, serial number 2B095049 and up
• 90 HP EFI, serial number 2B095049 and up
• 100 HP EFI, serial number 2B095049 and up
• 115 HP EFI, serial number 2B095049 and up
• 90 HP EFI SeaPro, serial number 2B095049 and up
• 100 Vazer, serial number 1A035000 through 1A036006
• 100 Vazer EC, serial number 1A035295 through 1A036006
• 115 HP EFI Pro XS, serial number 2B225488 and up
• 115 HP EFI SeaPro, serial number 2B095049 and up
• 135 HP EFI, serial number 2B131942 and up
• 150 HP EFI, serial number 2B139139 and up
• 150 HP EFI, serial number 2B550139 and up
• 150 EFI Pro XS, serial number 2B550139 and up
• 150 EFI SeaPro, serial number 2B139139 and up

Supersedes:

• 897526T

Service Note: Follow your Mercury service manual for IAC valve diagnosis, removal, installation, gasket or seal inspection, and any required idle relearn or system checks for your specific engine.

Fitment Note: Idle air control valve fitment should be verified by engine model, horsepower, serial number, intake system configuration, parts diagram, and existing part number before ordering. Please confirm this IAC valve is correct for your Mercury EFI outboard or Vazer application before purchasing.

Frequently Asked Questions

What is the Mercury 8M0188118 Idle Air Control Valve used for?

The Mercury 8M0188118 Idle Air Control Valve is a genuine OEM replacement IAC valve for select Mercury 4-Stroke EFI outboards and Vazer applications. It helps regulate engine idle speed by controlling airflow through the engine's intake system where specified by the Mercury parts diagram.

What Mercury outboards does the 8M0188118 IAC valve fit?

The Mercury 8M0188118 fits select EFI outboards from 65 HP through 150 HP, including specified Jet, Pro XS, SeaPro, and standard EFI applications. The supplied fitment information also includes 100 and 115 HP Vazer-related applications. Verify the engine model, horsepower, and serial number before ordering.

Does the Mercury 8M0188118 Idle Air Control Valve fit Vazer applications?

Yes. The listed applications include 100 Vazer with serial numbers 1A035000 through 1A036006 and 100 Vazer EC with serial numbers 1A035295 through 1A036006. The valve is also listed for select Mercury EFI outboards, so the specific application and serial number should be confirmed before purchase.

What symptoms can indicate a worn or faulty IAC valve on a compatible Mercury EFI engine?

On compatible applications, a worn or faulty IAC valve may be associated with idle quality issues, stalling, hard starting, or inconsistent low-speed operation. The product information recommends following the applicable Mercury service manual for IAC valve diagnosis and any required system checks.

Does Mercury 8M0188118 replace part number 897526T?

Yes. Mercury 8M0188118 supersedes Mercury part number 897526T. When replacing an IAC valve, verify the existing part number along with the engine model, horsepower, serial number, intake system configuration, and Mercury parts diagram to confirm the correct replacement.

What should I verify before purchasing the Mercury 8M0188118 IAC valve?

Verify the engine model, horsepower, serial number, intake system configuration, parts diagram, and existing part number. For installation and service, follow the Mercury service manual for your specific engine, including IAC diagnosis, removal, installation, gasket or seal inspection, and any required idle relearn or system checks.

California Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov