{"product_id":"mercury-mariner-100-125-hp-inline-4-cyl-80-57-5392","title":"Arco 5392 Replacement Starter – Mercury\/Mariner 80–125 HP Inline 4-Cylinder Outboards","description":"\u003ch2\u003eArco 5392 Replacement Outboard Starter Motor\u003c\/h2\u003e\u003cp\u003eThe Arco 5392 is a direct-fit replacement starter for Mercury and Mariner inline 4-cylinder outboards in the 80 to 125 HP range. These are among the most widely used outboard engines in the recreational boating market, found on everything from family runabouts to fishing boats, and the 5392 restores reliable starting performance with an 8-tooth drive gear and straightforward OEM-style installation. If your Mercury or Mariner inline 4 is cranking slowly or the starter has failed, this is the correct replacement unit.\u003c\/p\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 80 HP inline 4-cylinder outboards\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 100 HP inline 4-cylinder outboards\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 125 HP inline 4-cylinder outboards\u003c\/li\u003e\n\u003cli\u003e8-tooth drive gear configuration required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces OEM Part Numbers\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury: 50-66015-1, 50-66015-T, 50-66015-3\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect OEM replacement fit — no modifications required\u003c\/li\u003e\n\u003cli\u003e8-tooth drive gear for correct flywheel engagement\u003c\/li\u003e\n\u003cli\u003eBuilt for inline 4-cylinder Mercury and Mariner powerheads\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction for saltwater and freshwater use\u003c\/li\u003e\n\u003cli\u003eSKU: 57-5392\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe 5392 covers the inline 4-cylinder Mercury and Mariner outboards in the 80–125 HP class — a very common engine family that powered a huge number of recreational boats through the 1980s and 1990s. The 8-tooth drive gear is the critical spec to confirm before ordering; other Mercury starters in similar HP ranges use 9 or 10-tooth drives and will not fit. For Mercury 2-stroke applications in the 75–115 HP range, also see the \u003ca href=\"\/products\/arco-57-5377-outboard-starter-motor-mercury-75-115-hp\"\u003eArco 5377\u003c\/a\u003e and the \u003ca href=\"\/products\/arco-57-5380-outboard-starter-motor-mercury-75-115-hp-2-stroke\"\u003eArco 5380\u003c\/a\u003e. For Mercury 4-stroke applications, the \u003ca href=\"\/products\/arco-5415-replacement-starter-motor-mercury-80-115-hp-4-stroke-80-hp-jet-optimax\"\u003eArco 5415\u003c\/a\u003e covers 80–115 HP 4-stroke and Optimax Jet. When replacing the starter, inspect the solenoid at the same time — the \u003ca href=\"\/products\/arco-mercury-mercruiser-starter-solenoid-12v-isolated-base-57-sw275\"\u003eArco SW275 Mercury Solenoid (12V Isolated Base)\u003c\/a\u003e is the recommended companion for this application.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250827067428,"sku":"57-5392","price":394.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/57-5392.jpg?v=1786510756","url":"https:\/\/marisolmarine.com\/products\/mercury-mariner-100-125-hp-inline-4-cyl-80-57-5392","provider":"Marisol Marine Company","version":"1.0","type":"link"}