{"product_id":"mercury-relay-fits-45-50-hp-4-stroke-821509t01","title":"Mercury – Quicksilver 821509T01 Power Trim Relay | Mercury \u0026 Mariner Outboards | 821509T01","description":"\u003cp data-start=\"0\" data-end=\"96\"\u003e\u003cstrong data-start=\"0\" data-end=\"94\"\u003eMercury – Quicksilver 821509T01 Power Trim Relay | Mercury \u0026amp; Mariner Outboards | 821509T01\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"98\" data-end=\"101\"\u003e\n\u003ch3 data-start=\"103\" data-end=\"121\"\u003e\u003cstrong data-start=\"107\" data-end=\"119\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"122\" data-end=\"472\"\u003eIf your outboard’s trim system isn’t responding or only works intermittently, the relay is usually to blame. The \u003cstrong data-start=\"235\" data-end=\"277\"\u003eQuicksilver 821509T01 Power Trim Relay\u003c\/strong\u003e is the genuine OEM replacement designed for \u003cstrong data-start=\"322\" data-end=\"355\"\u003eMercury and Mariner outboards\u003c\/strong\u003e. It restores smooth, reliable power to your trim motor — so you can raise or lower your engine without hesitation.\u003c\/p\u003e\n\u003cp data-start=\"474\" data-end=\"677\"\u003eBuilt to Mercury’s factory standards, this relay handles the electrical demands of marine use. It’s sealed to resist water, salt, and vibration, keeping your trim system dependable season after season.\u003c\/p\u003e\n\u003chr data-start=\"679\" data-end=\"682\"\u003e\n\u003ch3 data-start=\"684\" data-end=\"706\"\u003e\u003cstrong data-start=\"688\" data-end=\"704\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"709\" data-end=\"789\"\u003e\n\u003cstrong data-start=\"709\" data-end=\"721\"\u003ePurpose:\u003c\/strong\u003e Restores full trim and tilt function by replacing a faulty relay.\u003c\/li\u003e\n\u003cli data-start=\"792\" data-end=\"900\"\u003e\n\u003cstrong data-start=\"792\" data-end=\"804\"\u003eFitment:\u003c\/strong\u003e For use with \u003cstrong data-start=\"818\" data-end=\"859\"\u003evarious Mercury and Mariner outboards\u003c\/strong\u003e (check your manual for compatibility).\u003c\/li\u003e\n\u003cli data-start=\"903\" data-end=\"1000\"\u003e\n\u003cstrong data-start=\"903\" data-end=\"920\"\u003eConstruction:\u003c\/strong\u003e Marine-grade materials designed to \u003cstrong data-start=\"956\" data-end=\"997\"\u003eresist corrosion, heat, and vibration\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1003\" data-end=\"1113\"\u003e\n\u003cstrong data-start=\"1003\" data-end=\"1019\"\u003ePerformance:\u003c\/strong\u003e Meets \u003cstrong data-start=\"1026\" data-end=\"1063\"\u003eMercury Marine OEM specifications\u003c\/strong\u003e for reliability and consistent electrical flow.\u003c\/li\u003e\n\u003cli data-start=\"1116\" data-end=\"1199\"\u003e\n\u003cstrong data-start=\"1116\" data-end=\"1136\"\u003eEase of Install:\u003c\/strong\u003e Direct-fit replacement installs easily with \u003cstrong data-start=\"1181\" data-end=\"1196\"\u003ebasic tools\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1201\" data-end=\"1204\"\u003e\n\u003ch3 data-start=\"1206\" data-end=\"1243\"\u003e\u003cstrong data-start=\"1210\" data-end=\"1241\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1246\" data-end=\"1293\"\u003eFits a range of Mercury and Mariner outboards\u003c\/li\u003e\n\u003cli data-start=\"1296\" data-end=\"1363\"\u003eCommon on fishing boats, runabouts, pontoons, and center consoles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1365\" data-end=\"1368\"\u003e\n\u003ch3 data-start=\"1370\" data-end=\"1412\"\u003e\u003cstrong data-start=\"1374\" data-end=\"1410\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1413\" data-end=\"1643\"\u003eThe \u003cstrong data-start=\"1417\" data-end=\"1447\"\u003e821509T01 Power Trim Relay\u003c\/strong\u003e provides the consistent voltage your trim motor needs to move smoothly. When a relay wears out, trim operation can become sluggish or stop entirely — this replacement restores instant response.\u003c\/p\u003e\n\u003cp data-start=\"1645\" data-end=\"1883\"\u003eThe relay’s sealed housing protects the internal contacts from corrosion, even in saltwater. It’s a quick, simple fix that brings your trim system back to factory reliability, giving you better control over engine angle and performance.\u003c\/p\u003e\n\u003chr data-start=\"1885\" data-end=\"1888\"\u003e\n\u003ch3 data-start=\"1890\" data-end=\"1911\"\u003e\u003cstrong data-start=\"1894\" data-end=\"1909\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1912\" data-end=\"2165\"\u003eMercury’s OEM electrical parts are designed specifically for the marine environment — constant vibration, moisture, and heavy current loads. Aftermarket relays might look similar but often aren’t fully sealed or use cheaper components that fail early.\u003c\/p\u003e\n\u003cp data-start=\"2167\" data-end=\"2300\"\u003eA \u003cstrong data-start=\"2169\" data-end=\"2198\"\u003egenuine Quicksilver relay\u003c\/strong\u003e gives you exact fit, tested reliability, and the long-lasting performance Mercury owners depend on.\u003c\/p\u003e\n\u003chr data-start=\"2302\" data-end=\"2305\"\u003e\n\u003ch3 data-start=\"2307\" data-end=\"2320\"\u003e\u003cstrong data-start=\"2311\" data-end=\"2318\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2321\" data-end=\"2487\"\u003e\u003cstrong data-start=\"2321\" data-end=\"2378\"\u003eQ1: What engines use the Quicksilver 821509T01 relay?\u003c\/strong\u003e\u003cbr data-start=\"2378\" data-end=\"2381\"\u003eA: It’s made for \u003cstrong data-start=\"2398\" data-end=\"2439\"\u003evarious Mercury and Mariner outboards\u003c\/strong\u003e — check your owner’s manual for exact models.\u003c\/p\u003e\n\u003cp data-start=\"2489\" data-end=\"2629\"\u003e\u003cstrong data-start=\"2489\" data-end=\"2520\"\u003eQ2: What does the relay do?\u003c\/strong\u003e\u003cbr data-start=\"2520\" data-end=\"2523\"\u003eA: It directs electrical power to your trim and tilt motor, allowing you to raise and lower your engine.\u003c\/p\u003e\n\u003cp data-start=\"2631\" data-end=\"2743\"\u003e\u003cstrong data-start=\"2631\" data-end=\"2663\"\u003eQ3: Can I install it myself?\u003c\/strong\u003e\u003cbr data-start=\"2663\" data-end=\"2666\"\u003eA: Yes. It’s a direct replacement that installs easily with standard tools.\u003c\/p\u003e\n\u003cp data-start=\"2745\" data-end=\"2871\"\u003e\u003cstrong data-start=\"2745\" data-end=\"2784\"\u003eQ4: Is it sealed against corrosion?\u003c\/strong\u003e\u003cbr data-start=\"2784\" data-end=\"2787\"\u003eA: Absolutely. It’s built with a sealed housing to resist water and salt exposure.\u003c\/p\u003e\n\u003cp data-start=\"2873\" data-end=\"3019\"\u003e\u003cstrong data-start=\"2873\" data-end=\"2912\"\u003eQ5: Why OEM instead of aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"2912\" data-end=\"2915\"\u003eA: OEM relays meet Mercury’s standards for durability and performance, ensuring long-term reliability.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936136155427,"sku":"821509T01","price":20.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/821509t01.jpg?v=1761573748","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-relay-fits-45-50-hp-4-stroke-821509t01","provider":"PartsVu","version":"1.0","type":"link"}