Atención al cliente: info@jlm-marine.com
Envío gratuito. Sin compra mínima.
Ignition Key Switch – Fits Mercury/Mariner DFI, EFI & MPI Outboard Motors (Replaces 87-17009A5)
- $21.99
$26.00- $21.99
- Unit price
- per
Couldn't load pickup availability
Envío gratis
Envío estándar gratuito en todos los pedidos inferiores a 1 kg.
Devoluciones sin preocupaciones
Aprende más.
Ignition Key Switch – Fits Mercury/Mariner DFI, EFI & MPI Outboard Motors (Replaces 87-17009A5)
This panel-mounted ignition key switch is a reliable replacement for Mercury and Mariner outboard motor control boxes requiring a 6-wire connection. It is designed for compatibility with a range of DFI (Direct Fuel Injection), EFI (Electronic Fuel Injection), and MPI (Multi-Point Injection) engines.
This unit is a direct replacement for Mercury part numbers 87-17009A5 and 87-17009A2, as well as Sierra part numbers MP41070-2, MP41070-1, and MP41070.
- Installation Type: Panel Mount
- Connection: 6-Wire
- Package Includes: 1x Ignition Key Switch, 2x Keys
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 87-17009A5 |
| Mercury | 87-17009A2 |
| Sierra | MP41070-2 |
| Sierra | MP41070-1 |
| Sierra | MP41070 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury/Mariner | DFI EFI MPI Outboard Motors | Various | Various | 87-17009A5 | Suits serial range: 0N001590+, 0G575500+ |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Ignition Key Switch |
| Installation | Panel Mount |
| Fuel Type | Gasoline |
| Connection | 6-Wire |
| Housing Material | Polyester Anti-Corrosion Housing with Brass Contacts |
| Dimensions | 57 × 37 mm (2.3 × 1.5 in) |
| Weight | 117g (4.1 oz) approximate |
| Mounting Hole | 7/8" Thread Size |
| Operating Voltage | 12V DC |
| Current Rating | Ignition: 15 Amp @ 12V DC Solenoid: 30 Amp @ 12V DC Choke: 7 Amp @ 12V DC |
| Switch Positions | 3-Position (OFF - RUN - START) |
| For Panels Up To | 15.87 mm (5/8") thickness |
| Other Technical Attributes | Has return spring for 3 positions |
Package Contents
- 1 × Ignition Key Switch (87-17009A5)
- 2 × Ignition Keys
Installation Guide
- Safety First: Disconnect the boat's battery cables (negative first, then positive) to prevent electrical shorts.
- Access the Switch: Open or remove the control box panel to access the back of the old ignition switch.
- Label and Disconnect: Before disconnecting, label each wire to ensure correct placement on the new switch. Carefully unplug the 6-wire connector.
- Remove Old Switch: Unscrew the mounting nut on the front of the panel and remove the old ignition switch.
- Install New Switch: Insert the new ignition switch into the panel, orient it correctly, and tighten the mounting nut until snug. Do not overtighten.
- Reconnect Wires: Attach the 6-wire connector to the new switch, ensuring it is fully seated and secure.
- Test the System: Reconnect the battery (positive first, then negative) and test all switch positions (OFF, RUN, START) to confirm proper function before heading out on the water.
Troubleshooting & FAQ
Q: How do I confirm this ignition switch fits my specific Mercury engine?
A: This switch fits various Mercury/Mariner DFI, EFI, and MPI outboard motors. The best way to confirm is to match your existing part number to the ones listed in our cross-reference table (87-17009A5, 87-17009A2) or the Sierra equivalents. Also, ensure your system uses a 6-wire connection.
Q: What are the common signs that my ignition key switch is failing?
A: Common symptoms include difficulty turning the key, the engine not cranking or starting intermittently, the engine shutting off unexpectedly, or a loss of power to accessories when the key is in the 'RUN' position. Corrosion on the contacts can also be a visual indicator.
Q: Is this a direct replacement for the Sierra MP41070-2?
A: Yes, this ignition switch serves as a direct aftermarket replacement for Sierra part numbers MP41070-2, MP41070-1, and MP41070, along with the OEM Mercury numbers.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Podemos enviar a prácticamente cualquier dirección del mundo con envío gratuito disponible para la mayoría de las regiones.
Para nuestros clientes típicos de EE. UU. y Canadá , nuestros plazos de envío son los siguientes:
- Amazon FBA : los pedidos se entregarán dentro de 1-5 días hábiles después de realizar el pedido (durante ciertos períodos especiales como promociones importantes, Navidad, etc., el tiempo de entrega de Amazon FBA puede verse afectado).
- Envío al almacén de EE. UU .: los pedidos se entregarán dentro de los 7 días posteriores a la realización del pedido.
- Envío al almacén de China : los pedidos se entregarán aproximadamente 12 días después de realizar el pedido.
Al realizar un pedido, estimaremos las fechas de envío y entrega según la disponibilidad de sus artículos y las opciones de envío que elija. Dependiendo del proveedor de envío que elija, las fechas de envío estimadas podrían aparecer en la página de presupuestos de envío.
Tenga en cuenta también que las tarifas de envío de muchos de los artículos que vendemos se basan en el peso. Puede consultar el peso de cada artículo en su página de detalles. Para reflejar las políticas de las empresas de envío que utilizamos, todos los pesos se redondearán a la libra superior.
Fundada en 2002, JLM Marine se ha consolidado como un fabricante dedicado de piezas marinas de alta calidad, con sede en China. Nuestro compromiso con la excelencia en la fabricación nos ha ganado la confianza de las principales marcas marinas a nivel mundial.
Como proveedor directo, evitamos intermediarios, lo que nos permite ofrecer precios competitivos sin comprometer la calidad. Este enfoque no solo promueve la rentabilidad, sino que también garantiza que nuestros clientes reciban el mejor valor directamente del proveedor.
Estamos entusiasmados de ampliar nuestro alcance a través de canales minoristas, llevando nuestra experiencia y compromiso con la calidad directamente a los propietarios de embarcaciones y entusiastas de todo el mundo.
Parts Finder
Use our Parts Finder to quickly locate the correct parts for your engine. Search by Make, HP, Stroke, Model, Year, and SN.
Select only the fields available — you don’t need to fill all options (e.g., leave Year blank if not applicable).
Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
- Choosing a selection results in a full page refresh.