{"product_id":"mallory-9-57800-marine-oil-filter-mercury-honda","title":"Mallory 9-57800 Marine Oil Filter – Mercury, Mariner \u0026 Honda Outboards","description":"\u003ch2\u003eMallory 9-57800 Marine Oil Filter – Mercury, Mariner \u0026amp; Honda Outboards\u003c\/h2\u003e\u003cp\u003eThe Mallory Marine 9-57800 is a compact, full-flow spin-on oil filter for select Mercury, Mariner, and Honda four-stroke outboards. It removes harmful contaminants from circulating engine oil while maintaining the lubrication flow needed to protect bearings, journals, and other internal engine components.\u003c\/p\u003e\u003cp\u003eThis marine filter specification uses a \u003cstrong\u003e20 mm × 1.5 mounting thread\u003c\/strong\u003e and includes an anti-drainback valve to help retain oil during shutdown for faster lubrication at startup. Current equivalent marine filters feature corrosion-resistant canisters and high-efficiency filtration media suited to the marine environment.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFull-flow spin-on engine oil filter\u003c\/li\u003e\n\u003cli\u003eDesigned for select four-stroke outboard applications\u003c\/li\u003e\n\u003cli\u003eThread specification: 20 mm × 1.5\u003c\/li\u003e\n\u003cli\u003eAnti-drainback valve helps reduce dry starts\u003c\/li\u003e\n\u003cli\u003eMarine-grade corrosion-resistant replacement options\u003c\/li\u003e\n\u003cli\u003eHeavy-wall steel replacement filter construction\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency filtration media\u003c\/li\u003e\n\u003cli\u003eCurrent Quicksilver replacement uses a 20-micron filter element\u003c\/li\u003e\n\u003cli\u003eLegacy Mallory part number: 9-57800\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\u003cp\u003eCommon applications include select Mercury and Mariner four-stroke outboards:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e8 and 9.9 hp, 323 cc models\u003c\/li\u003e\n\u003cli\u003e15 and 20 hp carbureted models\u003c\/li\u003e\n\u003cli\u003e25 and 30 hp EFI models from model year 2006 onward\u003c\/li\u003e\n\u003cli\u003eSelect 25\/30 hp EFI engines from serial number 0T801000 onward using the 492\/498 cc cylinder block\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe same filter specification is also associated with select Honda four-stroke outboards using Honda filter numbers including 15400-PFB-004, 15400-PFB-014, 15400-PJ7-005, 15400-PJ7-015, 15400-PM3-004, 15400-PM3-405, and 15400-ZZ3-003.\u003c\/p\u003e\u003ch3\u003eFitment Notice\u003c\/h3\u003e\u003cp\u003eConfirm the outboard model, model year, serial number, and number printed on the existing filter before ordering. Mercury and Mariner engines with the same advertised horsepower may use different oil filters depending on displacement, production range, and engine family. Do not select this filter by its 20 mm × 1.5 thread alone — the body size, sealing-gasket dimensions, anti-drainback valve, and internal filtration specifications must also match the engine.\u003c\/p\u003e\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\u003cp\u003eReplace the oil filter at the interval specified in the outboard owner’s manual. Mercury recommends replacement at least once each boating season and before winter storage, with shorter intervals where required by engine hours or operating conditions. Earlier replacement may be appropriate following extended trolling or low-speed operation, frequent short operating cycles, heavy-load or high-temperature use, fuel, water or debris contamination, internal engine repairs, abnormal oil-pressure conditions, or visible corrosion, denting, or leakage.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eRemove the old filter and confirm its sealing gasket has not remained on the engine’s filter mount. Clean the sealing surface and lightly lubricate the replacement filter gasket with clean engine oil. Install by hand to the manufacturer’s tightening specification — do not overtighten. After installation: refill with the specified oil, start the engine and allow oil pressure to build, inspect for leakage, shut down and allow oil to settle, then recheck and correct the oil level.\u003c\/p\u003e\u003ch3\u003eCross-Reference Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-57800\u003c\/li\u003e\n\u003cli\u003eSierra 18-7913\u003c\/li\u003e\n\u003cli\u003eEMP 35-57800\u003c\/li\u003e\n\u003cli\u003eQuicksilver 8M0154778 \/ 8M0162832 \/ 35-822626Q03 \/ 35-822626Q1\u003c\/li\u003e\n\u003cli\u003eMercury 8M0162831 \/ 35-822626 \/ 35-822626A1 \/ 35-822626K03 \/ 35-822626T1 \/ 35-851847A02\u003c\/li\u003e\n\u003cli\u003eHonda 15400-PFB-004 \/ 15400-PFB-014 \/ 15400-PJ7-005 \/ 15400-PJ7-015 \/ 15400-PM3-004 \/ 15400-PM3-405 \/ 15400-ZZ3-003\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCross-reference numbers are comparison aids. Confirm the exact outboard model and serial-number range before substituting filters.\u003c\/p\u003e\u003ch3\u003eOther Marine Oil Filters\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mallory-9-57825-marine-oil-filter-gm-mercruiser\"\u003eMallory 9-57825 – GM MerCruiser, Crusader \u0026amp; OMC\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wix-oil-filter-51083-mercury-mariner\"\u003eWIX Oil Filter 51083 – Mercury \u0026amp; Mariner Outboards\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wix-oil-filter-51365-honda-tohatsu-yanmar\"\u003eWIX Oil Filter 51365 – Honda Marine, Tohatsu \u0026amp; Yanmar\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/wix-oil-filter-51061-gm-tall-marine\"\u003eWIX Oil Filter 51061 – GM Tall Marine\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThis filter is used across several small four-stroke outboard families, but horsepower alone is not enough to confirm fitment. Matching the old filter number and engine serial number is the safest way to avoid selecting a similar-looking filter intended for a different engine block. The Honda cross-references are particularly useful — if you’re fitting a Honda outboard and the 9-57800 is unavailable, the \u003ca href=\"\/products\/wix-oil-filter-51365-honda-tohatsu-yanmar\"\u003eWIX 51365\u003c\/a\u003e covers many of the same Honda applications and is worth cross-checking against your engine serial number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada-wide shipping. ⚓\u003c\/p\u003e","brand":"MISC.","offers":[{"title":"Default Title","offer_id":43563933302820,"sku":"9-57800","price":12.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/images_248960ce-f57b-49af-a0e5-3b183bcb9bf4.jpg?v=1784322152","url":"https:\/\/marisolmarine.com\/products\/mallory-9-57800-marine-oil-filter-mercury-honda","provider":"Marisol Marine Company","version":"1.0","type":"link"}