{"product_id":"marinepro-outboard-water-pump-impeller-kit-for-mercury-mariner-8-25-hp-complete-housing-impeller-seals","title":"Marinepro Outboard Water Pump Impeller Kit for Mercury\/Mariner 8–25 HP — Complete Housing, Impeller \u0026 Seals","description":"\u003cp\u003e\u003cstrong\u003eMarinepro 99157T2 is a complete outboard water pump impeller kit engineered to replace Mercury\/Mariner parts and restore proper cooling flow on 8–25 HP 2‑ and 4‑stroke outboards.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit bundles the critical components needed to service the lower unit cooling system on a wide range of Mercury and Mariner small outboards. It replaces several OEM numbers (including 46‑99157T2, 99157A2 and 85098A2) and fits many 2‑stroke 15–25 HP models and 4‑stroke 8–15 HP\/9.9–13.5 HP configurations, including specific BigFoot engines. The set arrives with the housing, impeller, gaskets, hardware and seals so you can complete a full water pump job without hunting individual parts.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Mercury and Mariner engines will this impeller kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis kit is made to match OEM profiles for a variety of small outboards. Confirm fitment by cross‑referencing your engine serial numbers and model year ranges; the kit explicitly covers many 2‑ and 4‑stroke 8–25 HP variants and BigFoot 9.9\/15 HP 4‑stroke ranges listed by serial blocks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces Mercury numbers: 46‑99157T2, 4699157T2, 99157T2, 46‑99157A2, 46‑85098A2, 4699157A2, 4685098A2, 99157A2, 85098A2.\u003c\/li\u003e\n  \u003cli\u003eAlso replaces GLM part 12014 for cross compatibility.\u003c\/li\u003e\n  \u003cli\u003eFits 2‑stroke 15, 18, 20, 25 HP and 4‑stroke 8, 9.9, 13.5, 15 HP engines noted in specifications.\u003c\/li\u003e\n  \u003cli\u003eSpecifically lists Mercury 9.9 HP and 15 HP BigFoot 4‑stroke models within given serial ranges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components are included and why they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains every service item required to rebuild the pump assembly so you can replace worn parts in one visit. Having the correct housing, impeller and sealing parts prevents leaks, improves cooling flow, and reduces the chance of repeat failures from missing hardware.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 pump housing assembly — mounts and locates the impeller.\u003c\/li\u003e\n  \u003cli\u003e1 molded rubber impeller — flexible vanes move coolant through the block.\u003c\/li\u003e\n  \u003cli\u003eGasket and face plate — ensure a water‑tight seal at the housing joint.\u003c\/li\u003e\n  \u003cli\u003eDrive key, seal, washers, grommets and rings — all hardware to secure and seal the assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install this kit and what should I watch for?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a routine mechanical task for anyone familiar with lower unit service; follow the engine manufacturer’s procedures and torque specs. Inspect the impeller for correct vane direction, lubricate as instructed, replace all seals, and test for proper water flow at idle before heading out.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow Mercury\/Mariner torque and reassembly sequences in the service manual.\u003c\/li\u003e\n  \u003cli\u003eOrient impeller vanes correctly and use appropriate lube during assembly.\u003c\/li\u003e\n  \u003cli\u003eReplace all gaskets and seals rather than reusing old components.\u003c\/li\u003e\n  \u003cli\u003eBench‑test water flow or run engine briefly in a test tank to confirm cooling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Marinepro’s 99157T2 impeller kit is aimed at boat owners, marine mechanics, and service shops maintaining small Mercury and Mariner outboards where OEM‑equivalent replacement parts are required. Choose this kit if you need a complete water pump rebuild package that matches common OEM numbers, covers popular 8–25 HP models (including specified BigFoot 4‑stroke ranges), and includes the seals and hardware necessary for reliable reassembly. If you’re unsure about fitment, have your engine model and serial numbers on hand before ordering or consult a certified technician.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this impeller kit an exact replacement for Mercury part 46‑99157T2?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — Marinepro 99157T2 is made to replace Mercury numbers including 46‑99157T2 and equivalent OEM references.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this kit on a BigFoot 15 HP 4‑stroke Mercury?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit fits specified BigFoot 15 HP 4‑stroke engines within the serial ranges listed in the product notes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Marinepro","offers":[{"title":"Default Title","offer_id":67587532882105,"sku":"B0DQ4TDDR9","price":84.15,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/marinepro-pump-kit-front-packaging.jpg?v=1790512108","url":"https:\/\/redleafauto.ca\/products\/marinepro-outboard-water-pump-impeller-kit-for-mercury-mariner-8-25-hp-complete-housing-impeller-seals","provider":"Redleaf Auto","version":"1.0","type":"link"}