Mercury MerCruiser Quicksilver Ignition Key 126 | 30431126 | OEM Key Code 126

Part Details

• Part Number: 30431126
• Brand: Mercury Marine / Quicksilver (Genuine OEM)
• Official Product Type: Ignition Key Key Code 126
• Key Number Stamped: 126
• Key Series: Mercury 30431 / 89491 ignition key series
• System: Ignition / Electrical Ignition Switch Key
• GTIN / UPC: 745061134195
• Dimensions (approx.): 1.65 in. 0.80 in. 0.08 in.
• Weight (approx.): ~5 g / ~0.01 lb

What This Part Is

This is the genuine OEM Mercury / Quicksilver replacement ignition key stamped 126, part number 30431126. It is part of the Mercury 30431 ignition key series and is used wherever the ignition switch or key chart specifies key code 126. Match by the number stamped on the original key or the key code shown in the ignition switch parts diagram not by engine model or horsepower.

Compatible Applications

This key is matched by ignition key code 126, not by engine displacement or drive model. It is compatible with Mercury and MerCruiser ignition switches in the 30431 and 89491 series that specify key number 126. Verify the required key code from:

• The number stamped on the existing key
• The ignition switch key chart in the Mercury parts diagram for your vessels electrical or remote control group
• The stamped key-code reference on the ignition switch housing

Key Code Notice

The 30431 series covers key codes 123 through 134 (part numbers 30431123 through 30431134). Each key code is unique to its switch only the correct stamped number will operate the switch. Do not order by engine serial number or vessel model alone; always confirm the key code first.

When This Part Needs Replacement

• Original key is lost
• Key is bent, cracked, or worn
• Key no longer turns the ignition switch smoothly
• A spare key is needed for the vessel or emergency access

Installation Notes

• No mechanical installation required insert the key into the ignition switch and test before use
• Confirm the ignition switch is coded for key 126 before ordering
• Do not force the key if it does not turn smoothly the switch may require a different key code or the ignition cylinder may be worn
• Keep a spare key in a secure, accessible location on board

Cross-Reference Part Numbers

• Mercury / Quicksilver: 30431126
• Key stamped: 126
• Key series: 30431 / 89491
• Related key codes in same series: 123, 124, 125, 127, 128, 129, 130, 131, 132, 133, 134 confirm your exact code before ordering

Related Parts

• Browse Spark Plugs & Ignition Parts for Mercury and MerCruiser ignition components
• Browse MerCruiser Marine Engine Parts for the full Mercury / MerCruiser catalog

Parts Desk Insights

Best use case: The most common reason this key is ordered is a lost original it is also a good idea to keep a spare on board for any vessel where access to the ignition is time-sensitive. Because the price point is low, ordering a second key at the same time as the first is always worth considering.

Common issue: The most frequent ordering mistake is selecting a key without confirming the stamped key code. The 30431 series covers multiple key codes that look identical but operate different ignition cylinders. Always read the number stamped on the existing key or reference the Mercury key chart for the ignition switch. If the original key is already lost, the key code is usually stamped on the ignition switch housing or available through the vessels Mercury parts diagram.