Sierra MP51020 Yamaha Outboard Ignition Switch – OEM Replacement with Rubber-Molded Key
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Sierra MP51020 Yamaha Outboard Ignition Switch – OEM Replacement with Rubber-Molded Key
The Sierra MP51020 is a direct OEM-replacement ignition switch engineered specifically for Yamaha outboard engines. Designed to match the original equipment in fit, form, and function, it installs without modification and restores factory-level performance to your helm. The rubber-molded key delivers the same appearance and feel as the original Yamaha key while providing a solid, secure grip in all conditions — including when wearing gloves on the water.
This switch is compatible with Yamaha outboards equipped with DFI (Direct Fuel Injection), EFI (Electronic Fuel Injection), and MPI (Multi-Point Injection) engine management systems, making it a broad-coverage replacement for modern Yamaha four-stroke and two-stroke fuel-injected outboards.
Key Specifications
- Part Number: 11-MP51020
- Application: Yamaha outboard engines — OEM replacement
- Engine Compatibility: DFI, EFI, and MPI engine packages
- Key Type: Rubber-molded key (OEM appearance and feel)
- Fit: Direct OEM replacement — no modification required
Compatible Applications
- Yamaha outboard engines with DFI (Direct Fuel Injection) systems
- Yamaha outboard engines with EFI (Electronic Fuel Injection) systems
- Yamaha outboard engines with MPI (Multi-Point Injection) systems
- Powerboats, center consoles, and runabouts powered by compatible Yamaha outboards
- Direct replacement for worn, damaged, or lost OEM Yamaha ignition switches
Parts Desk Insights
The MP51020 is the right choice when you have a Yamaha outboard with a fuel-injected engine package and need a switch that matches the OEM key profile and helm appearance exactly. The rubber-molded key is a meaningful upgrade over generic aftermarket keys — it maintains the factory grip and look without compromise. If you also need to replace the kill switch lanyard on your Yamaha, the Sierra MP28860 Replacement Kill Switch Lanyard for Yamaha is the correct companion part. For a complete emergency cut-off switch and lanyard kit that works across conventional and magneto ignitions, the Sierra MP40960 Emergency Cut-Off Switch with Lanyard is also available.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.