{"product_id":"mercury-3-position-ignition-switch-for-outboards-replaces-87-17009a5-push-to-choke-magneto-off-run-start-mp51090","title":"Sierra MP51090 3-Position Ignition Switch, Push to Choke, Replaces Mercury 87-17009A5","description":"\u003cp\u003eThe Sierra MP51090 is a 3-position magneto ignition switch built for marine engines, covering the OFF-RUN-START sequence with a PUSH to Choke function for cold starts. It uses heavy duty potted construction to seal out moisture and vibration in the harsh marine environment, and is engineered with minimal bleed per circuit to keep electrical draw low across each contact path. The switch includes a molded umbrella type key, a durable design that resists the wear common to standard metal ignition keys on a boat's dash. Rated for 12 volt systems, it operates as a normally open, 3-way circuit switch with screw terminal connections for a secure wiring hookup, and is controlled by a push button actuator at the panel. The switch body is finished in white and built from polyester material with copper contacts, and it carries an IP54 ingress protection rating against dust and splashing water, an important spec for switches mounted on an open helm or console. It is designed for panel mounting and fits a standard 1 x 1 x 1 inch cutout footprint. This switch replaces Mercury outboard ignition switch 87-17009A5, making it a straightforward swap for boat owners repairing or upgrading a worn or failed OFF-RUN-START ignition switch on their console.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e MP51090\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e Ignition Switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositions:\u003c\/strong\u003e 3 Position Magneto - OFF-RUN-START\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoke Function:\u003c\/strong\u003e Push to Choke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 12 Volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit Type:\u003c\/strong\u003e 3-way\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Type:\u003c\/strong\u003e Normally Open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Screw Terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Method:\u003c\/strong\u003e Push Button\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Type:\u003c\/strong\u003e Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Panel Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Heavy duty potted construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKey Type:\u003c\/strong\u003e Molded umbrella type key\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress Protection Rating:\u003c\/strong\u003e IP54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyester\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1 x 1 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282269067\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits 12 volt marine ignition systems using a standard 1 x 1 x 1 inch panel-mount 3-position magneto switch.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury 87-17009A5\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra MP51090 replace?\u003c\/strong\u003e The MP51090 replaces Mercury ignition switch 87-17009A5, so it is a direct swap for that Mercury part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many positions does this ignition switch have?\u003c\/strong\u003e It is a 3-position magneto switch with OFF-RUN-START positions and a PUSH to Choke function for cold starts, part number MP51090.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage is the MP51090 ignition switch rated for?\u003c\/strong\u003e 12 volts. The switch is built for standard 12 volt marine ignition circuits with a normally open, 3-way contact configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the MP51090 switch?\u003c\/strong\u003e White. The Sierra MP51090 ignition switch has a white finish designed to mount into a standard helm or dash panel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size cutout does the MP51090 need?\u003c\/strong\u003e The switch measures 1 x 1 x 1 inches, matching a standard panel-mount ignition switch cutout.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the MP51090 waterproof?\u003c\/strong\u003e It carries an IP54 ingress protection rating, meaning it is protected against dust and splashing water, and uses heavy duty potted construction to seal out moisture in the marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the MP51090 switch made of?\u003c\/strong\u003e The switch body is made of polyester with copper contacts for reliable electrical conductivity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the MP51090 connect to the wiring harness?\u003c\/strong\u003e It uses screw terminal connectors, allowing wires to be secured directly to the switch terminals rather than a plug connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the umbrella type key on the MP51090?\u003c\/strong\u003e The MP51090 includes a molded umbrella type key, a plastic-headed ignition key designed to hold up to repeated marine use better than a standard metal key.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the MP51090 ignition switch weigh?\u003c\/strong\u003e The Sierra MP51090 weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the MP51090 include a choke function?\u003c\/strong\u003e Yes, the MP51090 is a PUSH to Choke design, meaning pushing the key activates the choke circuit alongside the OFF-RUN-START positions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra MP51090?\u003c\/strong\u003e The Sierra MP51090 ignition switch is listed under UPC 808282269067.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988457763035,"sku":"SIE-MP51090","price":44.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-MP51090__41795.1558187491.500.750.jpg?v=1785188325","url":"https:\/\/www.goodvibesmarina.com\/products\/mercury-3-position-ignition-switch-for-outboards-replaces-87-17009a5-push-to-choke-magneto-off-run-start-mp51090","provider":"Good Vibes Marina","version":"1.0","type":"link"}