{"product_id":"merc-946","title":"Mercury MerCruiser Switch Assembly 88031 | OEM Electrical Control","description":"\u003ch2\u003eMercury MerCruiser Switch Assembly 88031\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 88031  |  \u003cstrong\u003eAlso listed as:\u003c\/strong\u003e 87-88031\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury \/ MerCruiser \/ Quicksilver\u003cbr\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Switch Assembly — OEM Electrical Control\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine Electrical \/ Control Assembly\u003cbr\u003e\n\u003cstrong\u003eDiagram Position:\u003c\/strong\u003e Confirm exact location in the Mercury electrical or control assembly diagram for your specific engine model and serial number\u003c\/p\u003e\n\n\u003cp\u003eA genuine OEM Mercury MerCruiser switch assembly for applicable Mercury and MerCruiser engines and control assemblies. The \u003cstrong\u003e87-\u003c\/strong\u003e prefix in the Mercury catalog format identifies this as an electrical switch or control component. Switch assemblies in the Mercury lineup cover a range of functions — including ignition, trim\/tilt, choke, and panel controls — and are critical to reliable engine and drive operation. Always confirm the correct part number against the Mercury parts diagram for your specific engine before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMercury and MerCruiser engines and control assemblies where part number 88031 \/ 87-88031 is specified in the parts diagram\u003c\/li\u003e\n\u003cli\u003eConfirm fitment by engine model, serial number, and the Mercury electrical or control assembly diagram before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSwitch assembly fitment is engine-family and serial-number specific. Always verify part number 88031 against the Mercury parts diagram for your exact engine or control assembly — similar switch assemblies can differ in connector configuration, function, and mounting.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003ePart Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent type:\u003c\/strong\u003e Switch assembly — OEM electrical control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury catalog prefix:\u003c\/strong\u003e 87- (electrical switches and controls)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Controls an electrical circuit within the engine or control assembly — confirm specific function (ignition, trim, panel, or other) in the Mercury diagram for your application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM status:\u003c\/strong\u003e Genuine Mercury MerCruiser — not aftermarket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagram position:\u003c\/strong\u003e Confirm location and function in the Mercury electrical or control assembly diagram for your engine model and serial number\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSwitch fails to make or break the circuit reliably — intermittent operation or no response\u003c\/li\u003e\n\u003cli\u003eVisible corrosion, burning, or physical damage to the switch body or contacts\u003c\/li\u003e\n\u003cli\u003eWater intrusion into the switch assembly causing corrosion-related failure\u003c\/li\u003e\n\u003cli\u003eSwitch confirmed as faulty during electrical diagnosis\u003c\/li\u003e\n\u003cli\u003eCalled out for replacement in the Mercury service manual during control assembly service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the battery before working on any switch or electrical assembly.\u003c\/li\u003e\n\u003cli\u003ePhotograph or note the existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003eMatch the replacement switch by part number — do not substitute based on appearance alone.\u003c\/li\u003e\n\u003cli\u003eEnsure all connectors are fully seated and secure after installation.\u003c\/li\u003e\n\u003cli\u003eAfter installation, reconnect the battery and verify correct switch function before returning the engine to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this is the correct switch for my engine or control?\u003c\/strong\u003e\u003cbr\u003e\nA: Locate part number 88031 \/ 87-88031 in the Mercury electrical or control assembly diagram for your specific engine model and serial number. Switch assemblies are position- and function-specific — the diagram is the only reliable way to confirm the correct part before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I test the switch before replacing it?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Most switch assemblies can be tested with a multimeter for continuity in the on and off positions. Refer to the Mercury service manual for the correct test procedure and specifications for your application before condemning the switch.\u003c\/p\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This is the right part when 88031 is confirmed in the Mercury parts diagram for the engine or control assembly being serviced, and the existing switch has been diagnosed as faulty. Switch assemblies at this price point are typically multi-function or panel-mounted assemblies rather than simple single-pole switches — confirming the exact part number before ordering avoids a costly return.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issues:\u003c\/strong\u003e The most frequent issue is ordering a switch assembly by function description (e.g., “trim switch” or “ignition switch”) without confirming the part number against the Mercury diagram — Mercury uses many different switch assemblies across engine families and production years, and they are not interchangeable. A second common issue is water intrusion into the switch housing on older engines; if the switch has failed due to corrosion, inspect the surrounding wiring and connectors for damage before installing the replacement.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-40\"\u003eMercury MerCruiser Switch Assembly 18286T34\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-364\"\u003eMercury MerCruiser Quicksilver Switch Assembly 54211T\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-484\"\u003eMercury MerCruiser Lanyard Stop Switch Cap \u0026amp; Bumper Assembly 75095A2\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-39\"\u003eMercury Outboard Power Trim Tilt Switch Harness 18286A43\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-1096\"\u003eMercury MerCruiser Harness Repair Kit 8M0062017\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563900305444,"sku":"88031","price":171.19,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/6079604f-b55b-49e9-a0c4-05201cea0058.png?v=1787269517","url":"https:\/\/marisolmarine.com\/products\/merc-946","provider":"Marisol Marine Company","version":"1.0","type":"link"}