{"product_id":"mercury-pump-gearlub-6-91-802891a1","title":"Mercury – Gear Lube Pump | Lower Unit Service Tool | 91-802891A1","description":"\u003cp data-start=\"0\" data-end=\"68\"\u003e\u003cstrong data-start=\"0\" data-end=\"68\"\u003eMercury – Gear Lube Pump | Lower Unit Service Tool | 91-802891A1\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"70\" data-end=\"73\"\u003e\n\u003ch3 data-start=\"75\" data-end=\"89\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"90\" data-end=\"553\"\u003eThis Mercury gear lube pump makes lower unit service a lot less messy and a whole lot more predictable. It threads right into a standard drain plug port, letting you push fresh lube straight from the bottle without juggling funnels or hoses. It’s a simple tool, but it saves time every season—especially when you’re doing back-to-back services on multiple motors. Most boaters end up keeping one in their kit because it’s dependable and doesn’t overthink the job.\u003c\/p\u003e\n\u003chr data-start=\"555\" data-end=\"558\"\u003e\n\u003ch3 data-start=\"560\" data-end=\"578\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"579\" data-end=\"1095\"\u003e • \u003cstrong data-start=\"582\" data-end=\"612\"\u003eThreaded Pump Connection –\u003c\/strong\u003e Secures directly to a 3\/8\"-16 drain plug opening for steady, controlled pumping.\u003cbr data-start=\"693\" data-end=\"696\"\u003e • \u003cstrong data-start=\"699\" data-end=\"728\"\u003eMetric Adapter Included –\u003c\/strong\u003e Adds a proper fit for gearcases using an M8 x 1.25 drain plug.\u003cbr data-start=\"791\" data-end=\"794\"\u003e • \u003cstrong data-start=\"797\" data-end=\"822\"\u003eBottle-Ready Design –\u003c\/strong\u003e Attaches to standard quart and liter bottles without extra adapters.\u003cbr data-start=\"891\" data-end=\"894\"\u003e • \u003cstrong data-start=\"897\" data-end=\"921\"\u003eDirect Fill System –\u003c\/strong\u003e Pushes gear lube straight into the lower unit for clean, accurate service.\u003cbr data-start=\"996\" data-end=\"999\"\u003e • \u003cstrong data-start=\"1002\" data-end=\"1029\"\u003eService-Friendly Hose –\u003c\/strong\u003e Reduces drips and keeps the lube flow predictable during changes.\u003c\/p\u003e\n\u003chr data-start=\"1097\" data-end=\"1100\"\u003e\n\u003ch3 data-start=\"1102\" data-end=\"1135\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1136\" data-end=\"1321\"\u003e • Outboards and sterndrives with 3\/8\"-16 drain plug\u003cbr data-start=\"1188\" data-end=\"1191\"\u003e • Gearcases with M8 x 1.25 drain plug (with adapter)\u003cbr data-start=\"1244\" data-end=\"1247\"\u003e • All Mercury gear lube systems\u003cbr data-start=\"1279\" data-end=\"1282\"\u003e • Standard lower unit service setups\u003c\/p\u003e\n\u003chr data-start=\"1323\" data-end=\"1326\"\u003e\n\u003ch3 data-start=\"1328\" data-end=\"1366\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1367\" data-end=\"1821\"\u003eUsing this pump feels clean and controlled, especially when you’re servicing a gearcase on a trailer or at the dock. There’s no rush to beat a dripping stream of oil or line up a funnel—everything stays threaded and steady. The pump gives a clear, natural feel as the gear lube moves through the case, making it easy to tell when pressure changes or the bottle is running low. Over time, it just becomes one of those tools you reach for without thinking.\u003c\/p\u003e\n\u003chr data-start=\"1823\" data-end=\"1826\"\u003e\n\u003ch3 data-start=\"1828\" data-end=\"1845\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1846\" data-end=\"2210\"\u003eMercury’s OEM service tools match the threads, depth, and flow expectations of their gearcases, so you’re not forcing a universal adapter into place. The materials hold up to repeated seasonal use, and the pump delivers consistent flow without odd leaks or weak points. It keeps communication clean between the bottle and the gearcase—nothing fancy, just reliable.\u003c\/p\u003e\n\u003chr data-start=\"2212\" data-end=\"2215\"\u003e\n\u003ch3 data-start=\"2217\" data-end=\"2226\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"2227\" data-end=\"2387\"\u003e\u003cstrong data-start=\"2227\" data-end=\"2273\"\u003eQ1: How do I know I need a pump like this?\u003c\/strong\u003e\u003cbr data-start=\"2273\" data-end=\"2276\"\u003eIf you’re changing lower unit lube and fighting drips, mess, or slow filling, this tool makes the job smoother.\u003c\/p\u003e\n\u003cp data-start=\"2389\" data-end=\"2500\"\u003e\u003cstrong data-start=\"2389\" data-end=\"2446\"\u003eQ2: Does this pump require calibration or adjustment?\u003c\/strong\u003e\u003cbr data-start=\"2446\" data-end=\"2449\"\u003eNo adjustments—just thread it in and start pumping.\u003c\/p\u003e\n\u003cp data-start=\"2502\" data-end=\"2619\"\u003e\u003cstrong data-start=\"2502\" data-end=\"2548\"\u003eQ3: What if I service motors in saltwater?\u003c\/strong\u003e\u003cbr data-start=\"2548\" data-end=\"2551\"\u003eRinse the pump after use and it’ll hold up well season after season.\u003c\/p\u003e\n\u003cp data-start=\"2621\" data-end=\"2755\"\u003e\u003cstrong data-start=\"2621\" data-end=\"2667\"\u003eQ4: Any installation notes before pumping?\u003c\/strong\u003e\u003cbr data-start=\"2667\" data-end=\"2670\"\u003eThread the fitting in by hand first to avoid cross-threading, then attach the bottle.\u003c\/p\u003e\n\u003cp data-start=\"2757\" data-end=\"2916\"\u003e\u003cstrong data-start=\"2757\" data-end=\"2809\"\u003eQ5: What happens if the pump starts wearing out?\u003c\/strong\u003e\u003cbr data-start=\"2809\" data-end=\"2812\"\u003eYou’ll feel inconsistent pressure or see small leaks around the fitting, a sign it’s time to replace it.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46933993128227,"sku":"91-802891A1","price":12.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV513454_15.jpg?v=1698786675","url":"https:\/\/partsvu.com\/fr\/products\/mercury-pump-gearlub-6-91-802891a1","provider":"PartsVu","version":"1.0","type":"link"}