Ignition Switch Assembly – Fits Yamaha 2 & 4-Stroke Outboards 6-300 HP (Replaces 703-82510-43-00)
Ignition Switch Assembly – Fits Yamaha 2 & 4-Stroke Outboards 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
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Ignition Switch Assembly – Fits Yamaha 2 & 4-Stroke Outboards 6...
Ignition Switch Assembly – Fits Yamaha 2 & 4-Stroke Outboards 6-300 HP (Replaces 703-82510-43-00) is backordered and will ship as soon as it is back in stock.
Product Details
This is a direct-fit Ignition Switch Assembly – Fits Yamaha 2 & 4-Stroke Outboards 6-300 HP, designed for reliability and easy installation. It is compatible with a wide range of Yamaha 2-stroke and 4-stroke outboard motors from 6 HP to 300 HP, manufactured between 1998 and 2013. This includes International and VMAX series models, ensuring broad coverage for many common engines.
It serves as a direct interchange for Yamaha part numbers 703-82510-44-00, 703-82510-43-00, 703-82510-42-00, 703-82510-11-00, and Sierra MP51040.
- Mounts directly into the remote control box for a clean, factory look.
- Features an integrated push-to-choke function.
- The package includes the ignition switch assembly plus two keys.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 703-82510-44-00 | Supersedes previous versions |
| Yamaha | 703-82510-43-00 | |
| Yamaha | 703-82510-42-00 | |
| Yamaha | 703-82510-11-00 | |
| Sierra | MP51040 | Aftermarket cross-reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for a wide range of Yamaha Outboard, International, and VMAX models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | Outboard | 225 | 4-Stroke | 2003 | 703-82510-43-00 |
| Yamaha | Outboard | 250 | 4-Stroke | 2003 | 703-82510-43-00 |
| Yamaha | International | 6 | 2-Stroke & 4-Stroke | 2000–2001 | 703-82510-43-00 |
| Yamaha | International | 8 | 2-Stroke & 4-Stroke | 2000–2001 | 703-82510-43-00 |
| Yamaha | International | 9.9 | 2-Stroke & 4-Stroke | 2001–2013 | 703-82510-43-00 |
| Yamaha | International | 13.5 | 2-Stroke | 2005–2007 | 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 | 48 | 2-Stroke | 2003 | 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 | 95 | 2-Stroke | 2005–2008 | 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 | 140 | 2-Stroke | 2001–2012 | 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 | 240 | 2-Stroke | 2005–2007 | 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 |
| Yamaha | VMAX | Various | 2-Stroke | 2002–2013 | 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
- Fitting Type
- Panel Mount
- Product Dimensions
- 3.0" L x 5.0" W x 9.13" H
- Other Attributes
- Waterproof, dustproof, insulated, push-to-choke function
What’s in the Box
- 1 x Ignition Switch Assembly
- 2 x Keys
Installation Notes
- Disconnect the battery terminals to ensure a safe working environment.
- Access the rear of the remote control box or dashboard where the ignition switch is located.
- Carefully unplug the wiring harness connector from the back of the old switch.
- Unscrew the retaining nut on the exterior of the panel to release the old switch assembly.
- Insert the new ignition switch assembly into the panel, ensuring proper orientation.
- Secure the new switch by tightening the retaining nut. Do not overtighten.
- Firmly reconnect the wiring harness to the new switch until it clicks into place.
- Reconnect the battery terminals and test the new switch for proper function (Off, On, Start, and Push-to-Choke).
Troubleshooting & FAQ
How do I know if this ignition switch fits my specific Yamaha model?
This switch fits a wide range of Yamaha outboards (6-300 HP, 1998-2013). The best way to confirm is to match your existing part number to one of the equivalents listed in our Part Number Matrix (e.g., 703-82510-43-00). You can also visually compare your switch and connector to our product images.
What are common signs of a failing ignition switch?
Symptoms include difficulty turning the key, the engine cutting out intermittently, failure of the start or choke functions, or a complete inability to send power to the engine's electrical system. Corrosion at the terminals or a loose-feeling key mechanism are also indicators.
Is this a simple plug-and-play installation?
Yes, for the models listed, this is a direct-fit replacement. It uses the same panel mount and push-in electrical connector as the original Yamaha switch, requiring no special tools or wire splicing. Always disconnect the battery before starting work.
What is the "push-to-choke" feature?
This function allows you to prime the engine with fuel by pushing the key inwards while in the "On" position. It activates an electronic choke or fuel enrichment circuit, which is essential for cold starts on many carbureted and EFI engines.
Can I use my old keys with this new switch?
No. For security and proper function, each ignition switch is uniquely matched to the keys it comes with. This kit includes a new switch assembly and two new matching keys.
How is this aftermarket part different from the OEM version?
This part is designed to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function. It uses comparable high-strength materials for durability and performance but is available at a more competitive price point.
What is the difference between OEM and Aftermarket parts?
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.
What are your shipping speed and cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
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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