Ignition Switch Assembly – Fits Yamaha Outboard 6-300 HP (Replaces 703-82510-43-00)
Ignition Switch Assembly – Fits Yamaha Outboard 6-300 HP (Replaces 703-82510-43-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Ignition Switch Assembly – Fits Yamaha Outboard 6-300 HP (Replaces ...
Ignition Switch Assembly – Fits Yamaha Outboard 6-300 HP (Replaces 703-82510-43-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Ignition Switch Assembly – Fits Yamaha Outboard 6-300 HP (Replaces 703-82510-43-00) is engineered for a wide range of Yamaha 2-stroke and 4-stroke outboard motors from 6 to 300 horsepower (1998–2013). It also fits Yamaha International VMAX series (2002–2013) and specific 225/250 HP models from 2003.
This part is a direct interchange for Yamaha OEM part numbers 703-82510-44-00, 703-82510-43-00, 703-82510-42-00, and 703-82510-11-00, as well as Sierra MP51040.
- Installs in the remote control box for convenient panel-mount access.
- Features a waterproof, dustproof, and insulated housing for marine environments.
- Includes a push-in wiring connector with a protective sleeve.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 703-82510-44-00 |
| Yamaha | 703-82510-43-00 |
| Yamaha | 703-82510-42-00 |
| Yamaha | 703-82510-11-00 |
| Sierra | MP51040 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, this part fits a broad range of international outboard models manufactured between 1998 and 2013, covering both 2-stroke and 4-stroke engines from 6 to 300 HP.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | International | 6 | 2-Stroke & 4-Stroke | 2000–2001 | 703-82510-43-00 |
| Yamaha | International | 8 | 2-Stroke & 4-Stroke | 2000–2012 | 703-82510-43-00 |
| Yamaha | International | 9.9 | 2-Stroke & 4-Stroke | 2001–2013 | 703-82510-43-00 |
| Yamaha | International | 15 | 2-Stroke & 4-Stroke | 2001–2007 | 703-82510-43-00 |
| Yamaha | International | 25 | 2-Stroke & 4-Stroke | 1999 | 703-82510-43-00 |
| Yamaha | International | 30 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 40 | 2-Stroke & 4-Stroke | 1998–2012 | 703-82510-43-00 |
| Yamaha | International | 50 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 55 | 2-Stroke | 2000–2012 | 703-82510-43-00 |
| Yamaha | International | 60 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 70 | 2-Stroke & 4-Stroke | 2000–2012 | 703-82510-43-00 |
| Yamaha | International | 75 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 80 | 2-Stroke & 4-Stroke | 2000–2008 | 703-82510-43-00 |
| Yamaha | International | 85 | 2-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 90 | 2-Stroke & 4-Stroke | 2000–2012 | 703-82510-43-00 |
| Yamaha | International | 100 | 2-Stroke & 4-Stroke | 2000–2011 | 703-82510-43-00 |
| Yamaha | International | 115 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 130 | 2-Stroke | 2000–2007 | 703-82510-43-00 |
| Yamaha | International | 150 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 175 | 2-Stroke & 4-Stroke | 1999–2012 | 703-82510-43-00 |
| Yamaha | International | 200 | 2-Stroke & 4-Stroke | 1999–2013 | 703-82510-43-00 |
| Yamaha | International | 225 | 2-Stroke & 4-Stroke | 1999–2011 | 703-82510-43-00 |
| Yamaha | International | 250 | 2-Stroke & 4-Stroke | 2001–2012 | 703-82510-43-00 |
| Yamaha | International | 300 | 2-Stroke & 4-Stroke | 2004–2007 | 703-82510-43-00 |
Technical Specs
- Product Type
- Ignition Switch Key Assembly
- Installation
- Remote Control Box
- Connection
- Push-in with protective sleeve
- Housing Material
- High-strength polyoxymethylene with copper core
- Housing Color
- Black
- Dimensions
- 55 mm × 130 mm × 55 mm (2.17" × 5.12" × 2.17")
- Fitting Type
- Panel Mount
- Operating Voltage
- 12V DC
- Current Rating
- 12 Amps
- Circuit Type
- 3-way
- Contact Type
- Normally Closed
- Operation Mode
- OFF-ON-START with Push-to-Choke functionality
- Other Attributes
- Waterproof, dustproof, insulated
What’s in the Box
- 1 x Ignition Switch Key Assembly (703-82510-43-00)
- 2 x Keys
Installation Notes
- Disconnect the negative battery cable to prevent electrical shorts.
- Locate and access the rear of your remote control box where the ignition switch is mounted.
- Carefully unplug the wiring harness connector from the back of the old ignition switch.
- Unscrew the mounting nut that secures the switch to the panel and remove the old assembly.
- Insert the new ignition switch into the panel, align it correctly, and tighten the mounting nut.
- Firmly push the wiring harness connector into the new switch until it clicks into place.
- Reconnect the battery cable, insert the key, and test all switch positions (OFF, ON, START) to ensure proper function.
Troubleshooting & FAQ
What are the signs of a failing ignition switch?
Common symptoms include the engine failing to start, the starter motor not engaging, intermittent power loss to accessories, or the key being difficult to turn. If you experience these issues, it may be time to inspect or replace your ignition switch.
How can I confirm this switch fits my specific Yamaha model?
Cross-reference your original part number with the numbers in our Part Number Matrix. Additionally, check your engine's model, HP, and year against the compatibility table. When in doubt, visually compare your existing switch with our product photos.
What is "Push-to-Choke"?
The "Push-to-Choke" feature allows you to prime the engine with fuel by pushing the key inward while it's in the ON position. This is common on many carbureted outboard motors for easier cold starts.
Is professional installation required?
While installation is straightforward for those with basic mechanical skills, we recommend professional installation to ensure safety and proper electrical connections, especially if you are unfamiliar with your boat's wiring.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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