Yamaha Outboard Ignition Switch Assembly with Push-to-Choke – Control Box 2- and 4-Stroke – Replaces 703-82510-43-00
Yamaha Outboard Ignition Switch Assembly with Push-to-Choke – Control Box 2- and 4-Stroke – Replaces 703-82510-43-00 is backordered and will ship as soon as it is back in stock.
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Yamaha Outboard Ignition Switch Assembly with Push-to-Choke – Contr...
Yamaha Outboard Ignition Switch Assembly with Push-to-Choke – Control Box 2- and 4-Stroke – Replaces 703-82510-43-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket ignition switch assembly is designed for Yamaha outboard control boxes used with 2-stroke and 4-stroke engines. It provides three key positions—OFF, RUN/ON, and START—and includes push-to-choke operation for compatible Yamaha control-box installations.
The switch is a replacement for Yamaha OEM part number 703-82510-43-00 and is cross-referenced with Sierra MP51040. Confirm the part number, control-box configuration, wiring, and connector style before ordering.
- For Yamaha outboard control-box applications.
- Compatible with applicable 2-stroke and 4-stroke systems.
- Three-position ignition operation: OFF, RUN/ON, and START.
- Push-to-choke function for compatible installations.
- Wiring colors are intended to match the factory color codes for the referenced application.
Part Number Matrix
Use these references to compare the replacement with your original switch.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yamaha | 703-82510-43-00 | OEM replacement reference |
| Sierra | MP51040 | Aftermarket cross-reference |
Confirmed Engine Catalog Applications
The following Yamaha catalog applications list 703-82510-43-00 as the main switch assembly in the remote-control assembly. These entries are specific catalog relationships; they do not establish fitment for every Yamaha engine or every control box.
| Brand | Model | Rated HP | Stroke | Year | Catalog Position |
|---|---|---|---|---|---|
| Yamaha | LX225TXRB | 225 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | LX250TXRB | 250 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | SX225TURB | 225 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | SX225TXRB | 225 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | SX250TURB | 250 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | SX250TXRB | 250 | 2-Stroke | 2003 | Main Switch Assembly, Ref. 44 |
| Yamaha | RIGGING 20 | Not specified | 2-Stroke | 2006 | Main Switch Assembly, Ref. 44 |
| Yamaha | RIGGING 20 | Not specified | 2-Stroke | 2007 | Main Switch Assembly, Ref. 44 |
Technical Specifications
- Product Type
- Ignition switch assembly
- Application
- Yamaha outboard control box
- Stroke Compatibility
- 2-stroke and 4-stroke applications listed for the corresponding control-box design
- Switch Positions
- OFF, RUN/ON, and START
- Choke Function
- Push-to-choke
- Installation Location
- Remote control box
- Replacement Reference
- Yamaha 703-82510-43-00
What's in the Box
- 1 x Ignition switch assembly
Package appearance and included hardware may vary by production batch. Compare the supplied assembly with the original switch before installation.
Installation Notes
- Disconnect the negative battery cable and follow the boat manufacturer's electrical safety procedures.
- Access the rear of the remote control box and identify the existing ignition switch.
- Before disconnecting anything, document the original connector and wire positions.
- Disconnect the wiring connector and remove the mounting hardware securing the old switch.
- Install the replacement switch in the same panel orientation and secure it with the original mounting hardware where suitable.
- Reconnect the wiring connector fully. Do not force a connector or alter wire positions unless the application instructions specifically require it.
- Reconnect the battery, then test OFF, RUN/ON, START, and push-to-choke operation before returning the boat to service.
Troubleshooting & FAQ
What is this switch designed to replace?
This switch is cross-referenced to Yamaha OEM part number 703-82510-43-00 and Sierra MP51040 for the applicable Yamaha control-box installation.
Does it work with both 2-stroke and 4-stroke outboards?
The referenced aftermarket catalog identifies this control-box switch for Yamaha 2-stroke and 4-stroke outboards. Fitment still depends on the control box, wiring, connector, and original part number.
What does push-to-choke mean?
Push-to-choke means the ignition key can be pressed inward to activate the choke circuit when the compatible outboard and control system require it.
How can I verify fitment?
Compare the original part number, switch position layout, connector, wire colors, mounting arrangement, engine model, year, and control-box configuration. Do not rely on horsepower alone.
Is professional installation recommended?
Yes. Because an incorrect electrical connection can damage equipment or create a safety hazard, installation should be performed by a qualified marine technician if you are not familiar with outboard wiring.
Is this an OEM Yamaha component?
No. This listing is for an aftermarket replacement that cross-references the Yamaha OEM part number shown above.
Safety & Important Information
- Disconnect the battery before working on the ignition circuit.
- Verify the original part number and connector before purchase or installation.
- Do not assume compatibility with every Yamaha engine based only on horsepower, stroke, or year.
- Stop installation if the replacement connector, wire arrangement, mounting pattern, or switch functions differ from the original.
About Sea Sierra
- Marine Replacement Parts — We provide replacement components for boat and outboard service applications.
- Application-Focused Listings — Product references and compatibility information are presented to help customers compare the original component.
- Customer Support — Contact support with your original part number, engine model, year, and control-box details when fitment assistance is needed.
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