{"title":"Crusader 8.1L 4-Stroke Marine Engine","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is focused on Crusader 8.1L 4‑Stroke marine engines. Use it to find compatible parts, service items, maintenance tips, and troubleshooting guidance. You can also browse our main Crusader collection for service kits. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the Filter \u0026amp; Sort controls to narrow results by model year, category, and more.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Crusader Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 8.1L Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the Crusader identification plate on the engine (typically near the transmission\/flywheel end or on the intake area). Record the model and serial number.\u003c\/li\u003e\n    \u003cli\u003eModel coding often includes an engine code for 8.1L variants (e.g., 810 for 8.1L MPI Standard, 811 for 8.1L MPI High Output) and digits that indicate build decade\/year. The first serial digit commonly denotes decade, the second the year.\u003c\/li\u003e\n    \u003cli\u003eRotation and drive details are indicated by model\/serial data. Many 8.1L packages are LH rotation; actual prop shaft rotation may depend on transmission setup.\u003c\/li\u003e\n    \u003cli\u003eTo distinguish Standard vs. High Output, check the model code and the specified WOT range on the spec label (8.1L STD typically 4400–4800 RPM; 8.1L HO typically 4800–5200 RPM).\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003e8.1L MPI Standard (496 CID V8)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGM‑based 496 CID V8, multi‑port fuel injection (MPI), freshwater‑cooled variants common\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEngine code examples: 810 (8.1L LH MPI). Transmission options include Velvet Drive and Hurth\/ZF.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eStrong low‑to‑mid torque, smooth operation, robust charging output\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePreferred WOT ~4600 RPM (range ~4400–4800). ECM‑07 engine management with fault codes and CAN\/J1939 outputs; follow ventilation and fuel temperature best practices to avoid hot‑soak\/vapor issues.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e8.1L MPI High Output (496 CID V8 HO)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGM‑based 496 CID V8, MPI, High Output calibration\/components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEngine code examples: 811 (8.1L LH H.O. MPI). Used with full‑reversing down‑angle or V‑drive transmissions.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHigher top‑end power with strong mid‑range pull; compatible with Sync‑N‑Cruz on ECM‑07 systems\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePreferred WOT ~5000 RPM (range ~4800–5200). Ensure prop selection keeps WOT within the recommended band; ECM over‑rev governor prevents overspeed but is not a substitute for correct propping.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑stroke Crusader 8.1L engines. Always follow the official Crusader service manual and the transmission manufacturer’s instructions for your exact model.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eUse marine‑grade oil meeting Crusader specs; replace filter each service\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel\/water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 50 hrs; replace at least annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eDrain water as needed; ethanol blends warrant more frequent checks\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eRaw‑water pump impeller\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 200 hrs or 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace sooner if stream weakens or after sandy\/silty use\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 300 hrs or 3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVerify correct heat range\/gap per Crusader specs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAnodes (coolers\/heat exchangers)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect 50 hrs; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eIntervals shorten in warm\/brackish water\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSerpentine\/accessory belt\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect 100 hrs; replace if cracked\/glazed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfirm tensioner condition and alignment\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eTransmission fluid (Velvet Drive\/Hurth)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInitial 100 hrs, then per transmission manual (often annually)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck level hot after cycling gears; use specified ATF\/gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\"\u003eCrusader Service Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px; color:#6b7280; margin-top:8px;\"\u003e*Service intervals may vary by duty cycle and environment. Always follow the latest Crusader and transmission manufacturer guidance.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service Kits – \u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\"\u003eCrusader Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel\/Water Separation – \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eRaw Water Cooling – \u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eEngine Oil Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition\/Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e, \u003ca href=\"https:\/\/seasierra.com\/collections\/starters\"\u003eStarters\u003c\/a\u003e, \u003ca href=\"https:\/\/seasierra.com\/collections\/alternators\"\u003eAlternators\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eEngine Management \u0026amp; Sensors – \u003ca href=\"https:\/\/seasierra.com\/collections\/sensors\"\u003eSensors\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWeak water stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSea strainer cleanliness, intake obstruction, impeller condition, hose kinks, thermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eRaw water pump impeller\/kit, thermostat, intake screen\/strainer, hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel quality, water in separator, restricted filters, fouled plugs, ECM fault codes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel\/water separator, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHard starting or rough idle (hot soak)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eBilge ventilation\/heat soak, vapor in lines, battery voltage, vacuum leaks, sensor faults (scan ECM)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel filter\/separator, sensors (IAC\/MAP\/TPS), spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGearbox noise or harsh engagement\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFluid level\/condition hot, shift cable travel, engine\/shaft alignment\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eTransmission fluid\/service items, shift cable hardware, coupler\/mounts\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between 8.1L Standard and 8.1L High Output?\u003c\/summary\u003e\n    \u003cp\u003eMany service items (filters, belts, anodes, most cooling parts) are shared. Performance‑related components and calibrations can differ. Always confirm with the engine model code and serial number.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the raw‑water impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, every 200 hours or 2 years, whichever comes first. Replace sooner if operating in sandy\/silty water, if the tell‑tale stream weakens, or after any overheat event.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should transmission fluid be serviced?\u003c\/summary\u003e\n    \u003cp\u003ePerform the initial change at about 100 hours, then follow the transmission manufacturer’s interval (often annually or every 200 hours). Always check hot after cycling gears and use the specified fluid type.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the Crusader model code, serial number, rotation, transmission model\/ratio, and clear photos of the nameplate and the part to replace. This ensures we match the correct parts for your exact 8.1L setup.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find the right parts? Browse our Crusader collection and refine by category to get what you need for your 8.1L engine.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse Crusader Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; font-size:12px; color:#6b7280;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"fuel-injector-fits-mercury-mercruiser-496-mag-8-1l-engines-replaces-881693002","title":"100% New Fuel Injector for Mercury MerCruiser MPI 8.1L V8 and Volvo Penta 8.1L\/496 CID Engines","description":"\u003cstyle\u003e\n\/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n\/* Base table styles *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td {\n  padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n}\n\ntable.ss-table th {\n  white-space:nowrap;\n  word-break:normal;\n  letter-spacing:normal;\n  font-weight:600;\n  background:#f8fafc;\n}\n\n@media (max-width:480px){\n  table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n}\n\u003c\/style\u003e\n\u003csection\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e100% new aftermarket fuel injector\u003c\/strong\u003e is designed for Mercury MerCruiser MPI 8.1L V8 applications, including 496 Mag and 496 Mag HO engines, as well as Volvo Penta marine 8.1L and 496 CID engines. It is sold as one individual injector and is intended to replace the original injector when the applicable part number and engine configuration match.\u003c\/p\u003e\n\u003cp\u003eThe Sierra catalog identifies reference number \u003cstrong\u003e18-7698\u003c\/strong\u003e as a fuel injector that replaces Mercury part number \u003cstrong\u003e881693002\u003c\/strong\u003e and fits MCM 496 Mag and HO engines and MIE 8.1S and HO applications. The company catalog also lists Mercury references \u003cstrong\u003e8M0221353\u003c\/strong\u003e and \u003cstrong\u003e881693\u003c\/strong\u003e, Volvo Penta reference \u003cstrong\u003e3861278\u003c\/strong\u003e, and Crusader reference \u003cstrong\u003eRA087006\u003c\/strong\u003e for this product family.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% new\u003c\/strong\u003e aftermarket fuel injector; not a used or remanufactured component.\u003c\/li\u003e\n  \u003cli\u003eSold individually for replacement of one injector.\u003c\/li\u003e\n  \u003cli\u003eSuitable for specified Mercury MerCruiser and Volvo Penta 8.1L\/496 CID marine applications when the original reference and connector match.\u003c\/li\u003e\n  \u003cli\u003eVerify the original injector and engine details before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following references are provided for identification and cross-reference purposes. A number appearing in this table does not replace the need to verify the engine application, connector, and original injector.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand or Source\u003c\/th\u003e\n        \u003cth\u003eReference Number\u003c\/th\u003e\n        \u003cth\u003eRelationship\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e881693002\u003c\/td\u003e\n        \u003ctd\u003eReplacement reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e8M0221353\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e881693\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3861278\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra Marine\u003c\/td\u003e\n        \u003ctd\u003e18-7698\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCrusader Marine\u003c\/td\u003e\n        \u003ctd\u003eRA087006\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory Marine\u003c\/td\u003e\n        \u003ctd\u003e9-33103\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eUse the following application information as a guide, then confirm the part number on your original injector. Model, engine configuration, year, and serial-number conditions must match the application for a correct fit.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine or Application\u003c\/th\u003e\n        \u003cth\u003eFuel System\u003c\/th\u003e\n        \u003cth\u003eDisplacement\u003c\/th\u003e\n        \u003cth\u003eReference\u003c\/th\u003e\n        \u003cth\u003eFitment Note\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e496 Mag\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8 \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003e881693002\u003c\/td\u003e\n        \u003ctd\u003eApplication listed for the fuel injector reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e496 Mag HO\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8 \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003e881693002\u003c\/td\u003e\n        \u003ctd\u003eApplication listed for the fuel injector reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e8.1S\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8 \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003e881693002\u003c\/td\u003e\n        \u003ctd\u003eApplication listed for the fuel injector reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e8.1L HO\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8 \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003e881693002\u003c\/td\u003e\n        \u003ctd\u003eApplication listed for the fuel injector reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eMarine 8.1L \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8 \/ 496 CID\u003c\/td\u003e\n        \u003ctd\u003e3861278\u003c\/td\u003e\n        \u003ctd\u003eCompany-listed fitment; verify the original part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCrusader Marine\u003c\/td\u003e\n        \u003ctd\u003e8.1L marine applications\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e8.1L V8\u003c\/td\u003e\n        \u003ctd\u003eRA087006\u003c\/td\u003e\n        \u003ctd\u003eCross-reference only; confirm the application before purchase\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eDo not rely on engine displacement alone. Compare the original injector, electrical connector, mounting arrangement, and applicable manufacturer reference before installation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eFuel injector\u003c\/dd\u003e\n  \u003cdt\u003eCondition\u003c\/dt\u003e\n  \u003cdd\u003e100% new aftermarket component\u003c\/dd\u003e\n  \u003cdt\u003eQuantity\u003c\/dt\u003e\n  \u003cdd\u003eOne injector\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMarine gasoline MPI fuel systems for specified 8.1L V8 \/ 496 CID engines\u003c\/dd\u003e\n  \u003cdt\u003ePrimary Reference\u003c\/dt\u003e\n  \u003cdd\u003eMercury MerCruiser 881693002\u003c\/dd\u003e\n  \u003cdt\u003eAdditional Company-Listed References\u003c\/dt\u003e\n  \u003cdd\u003e8M0221353, 881693, Volvo Penta 3861278, Crusader RA087006\u003c\/dd\u003e\n  \u003cdt\u003eAftermarket Cross-References\u003c\/dt\u003e\n  \u003cdd\u003eSierra 18-7698; Mallory 9-33103\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e 100% new fuel injector\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and follow the engine manufacturer's procedure for safely relieving fuel-system pressure.\u003c\/li\u003e\n  \u003cli\u003eConfirm that the replacement injector matches the original injector, connector, mounting arrangement, and applicable reference number.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the electrical connector from the injector.\u003c\/li\u003e\n  \u003cli\u003eRemove the fuel rail or injector retaining hardware according to the engine service procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the old injector carefully and protect the fuel rail and sealing surfaces from dirt or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement injector using clean, properly lubricated seals where required by the manufacturer's procedure.\u003c\/li\u003e\n  \u003cli\u003eSecure the injector and reinstall the fuel rail and retaining hardware using the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eReconnect the electrical connector and battery.\u003c\/li\u003e\n  \u003cli\u003ePrime the fuel system as specified by the engine manufacturer, then inspect the injector and fuel rail for leaks before operating the engine.\u003c\/li\u003e\n  \u003cli\u003eStart the engine only after confirming that there are no fuel leaks, and check for proper operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eFuel-system work can create a fire hazard. Use appropriate ventilation, keep ignition sources away, and have installation performed by a qualified marine technician when necessary.\u003c\/p\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this injector sold as a set?\u003c\/summary\u003e\u003cp\u003eNo. This product is sold as one individual 100% new fuel injector. If replacing multiple injectors, order the required quantity separately.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich engines is this injector intended for?\u003c\/summary\u003e\u003cp\u003eThe company-listed application is Mercury MerCruiser MPI 8.1L V8. Related listed applications include Mercury 496 Mag and 496 Mag HO, Mercury 8.1S and 8.1L HO, and Volvo Penta marine 8.1L\/496 CID engines. Confirm the original reference and engine configuration before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it replace Mercury reference 881693002?\u003c\/summary\u003e\u003cp\u003eYes. The company catalog lists 881693002 as a replacement reference, and the Sierra catalog identifies 18-7698 as a fuel injector that replaces 881693002 for the specified 496 Mag, 496 Mag HO, 8.1S, and HO applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a genuine Mercury or Volvo Penta part?\u003c\/summary\u003e\u003cp\u003eNo. This is a 100% new aftermarket replacement injector. Mercury, Volvo Penta, Sierra, and other names and numbers are used only to identify compatible reference applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo I need to replace all injectors at once?\u003c\/summary\u003e\u003cp\u003eNot necessarily. Replace the failed injector or the quantity recommended by your marine technician, and follow the engine manufacturer's service guidance. Matching the correct injector across the engine is important for consistent fuel delivery.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs programming or ECU tuning required?\u003c\/summary\u003e\u003cp\u003eA stock replacement injector normally does not require programming, but the correct application and injector specification must be confirmed before installation. Follow the engine manufacturer's service instructions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm compatibility?\u003c\/summary\u003e\u003cp\u003eCompare your original injector's manufacturer reference, engine model, fuel-injection system, connector, and mounting arrangement with the information on this page. When the details do not match, contact a qualified marine technician before purchasing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the shipping speed and cost?\u003c\/summary\u003e\u003cp\u003eShipping availability, delivery time, and cost are calculated at checkout based on destination and service selected.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\u003cp\u003eWarranty and return eligibility are governed by the current store policies. Review the applicable policy before installation, because installed or used fuel-system components may have different return requirements.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the original injector reference and complete engine application before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on displacement or model name alone; year, fuel system, connector, and serial-number conditions may affect fitment.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement component, not a genuine OEM component.\u003c\/li\u003e\n  \u003cli\u003eRelieve fuel pressure before service and inspect carefully for leaks after installation.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for fuel-system work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We supply replacement components for a range of marine engine and sterndrive applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and fitment information are provided to help you compare the replacement with your original part.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport Before Installation\u003c\/strong\u003e — If your engine details or original part number differ from the information shown, verify compatibility before ordering or installing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723978346811,"sku":"25FUI444","price":42.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/25FUI444_5be3f190-9639-4f35-aa73-4da7a6092634.jpg?v=1763039112"}],"url":"https:\/\/seasierra.com\/collections\/crusader-8-1l-4-stroke-marine-engine.oembed","provider":"SeaSierra","version":"1.0","type":"link"}