Replacement Ignition Switch (Push-to-Choke) + 2 Keys for Mercury
mms-529
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Mercury Mariner Push-to-Choke Ignition Switch 17009A5 2 Keys MMS-529
SKU / MPN: mms-529
Potted six-wire ignition key switch with push-to-choke for compatible Mercury and Mercury-built Mariner control boxes.
Technical specification
| Key fitment / installation | 12V OFF-RUN-START ignition switch with push-to-choke, 22.2mm D-shaped panel hole and potted wire leads. For selected Mercury/Mercury-based Mariner remote controls from approximately 1981 using OEM 17009A2/A5; match wiring and terminal functions. |
| Brand | Aftermarket |
| SKU / MPN | mms-529 |
| Positions | OFF-RUN-START plus push-to-choke |
| Supply | 12V DC |
| Panel hole | 22.2mm / 7/8in D-shaped |
| Ratings | Ignition 15A; solenoid 30A; choke 7A |
| Included | 2 keys and mounting nut |
Compatibility / suitable applications
- Mercury and Mercury-based Mariner remote-control boxes from approximately 1981 using the 17009A2/17009A5 potted wire-lead switch
Part-number references
- Mercury 17009A2, 17009A5, 87-17009A2, 87-17009A5
- Electronic/magneto configuration and wire colours must match the original
- Not interchangeable with every Mercury 88107-type screw-terminal switch
- Disconnect the battery and record wiring before removal
Frequently asked questions
Will this replace any Mercury ignition switch?
No. It is for the 17009A2/17009A5 wire-lead switch family with OFF-RUN-START and push-to-choke. Compare the control-box type, panel hole, wire colours/functions and ratings before disconnecting the old switch.
What is included in this product?
One new Mercury Mariner Push-to-Choke Ignition Switch 17009A5 2 Keys MMS-529. No additional parts are included unless they are explicitly listed in the technical specification.
How do I confirm compatibility?
Match the exact model or installation type, all stated technical specifications and at least one listed OEM/manufacturer reference. Horsepower, appearance or overall size alone is not enough.
Is this a genuine OEM part?
No. This is a new aftermarket replacement part; the OEM names and numbers are used only to identify compatibility.
What should I send if I am unsure?
Send the complete engine or equipment model, serial number, the number on the original part and clear photos of the connections and mounting points before ordering.
Before ordering
- Find the engine model and serial number, or measure the installation—not just the old item's appearance.
- Confirm the original OEM number and all electrical/mechanical specifications.
- If unsure, send us the model, serial number and clear photos before purchase.
Supply: New item supplied by 4Boats, a UK VAT-registered marine business seller. Professional installation is recommended for engine, fuel, electrical and safety equipment.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
