{"product_id":"90-amp-fuse-assembly-fits-mercruiser-3-0l-8-2l-replaces-79023a91-88-79023a91-8m0207795","title":"90 Amp Fuse Assembly – Fits MerCruiser 3.0L-8.2L (Replaces 79023A91, 88-79023A91, 8M0207795)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e90 Amp Fuse Assembly\u003c\/strong\u003e is a crucial safety component designed to protect the starter and alternator circuits on a wide range of Mercury MerCruiser stern drive and inboard engines from 1983 to 2016, covering 3.0L to 8.2L models. It also serves as a power steering motor fuse on specific Mercury Verado outboards.\u003c\/p\u003e\n\u003cp\u003eIt is a direct interchange for Mercury\/MerCruiser part numbers 79023A91, 88-79023A91, and the superseded 8M0207795, as well as aftermarket equivalents like Sierra 18-8220 and Mallory 9-15510.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls directly using factory mounting points for a perfect fit.\u003c\/li\u003e\n\u003cli\u003eFeatures threaded stud terminals for secure, low-resistance electrical connections.\u003c\/li\u003e\n\u003cli\u003eConstructed with a durable brass and plastic-insulated housing to withstand harsh marine environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eSuperseded By\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\u003e79023A91\u003c\/td\u003e\n        \u003ctd\u003e8M0207795\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e88-79023A91\u003c\/td\u003e\n        \u003ctd\u003e8M0207795\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-8220\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-15510\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis fuse assembly fits a wide variety of MerCruiser stern drive, inboard, and Verado outboard power steering applications.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e3.0L GM 181 I\/L4\u003c\/td\u003e\n\u003ctd\u003e130–140\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e4.3L GM 262 V6\u003c\/td\u003e\n\u003ctd\u003e180–220\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.0L GM 305 V8\u003c\/td\u003e\n\u003ctd\u003e220–260\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1983–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L GM 350 V8\u003c\/td\u003e\n\u003ctd\u003e250–330\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1983–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e6.2L MX 377 V8\u003c\/td\u003e\n\u003ctd\u003e320–370\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e7.4L GM 454 V8\u003c\/td\u003e\n\u003ctd\u003e310–420\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982–2000\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e8.1L GM 496 V8\u003c\/td\u003e\n\u003ctd\u003e370–425\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e8.2L GM 502 V8\u003c\/td\u003e\n\u003ctd\u003e415–500\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993–2000\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eBlack Scorpion\u003c\/td\u003e\n\u003ctd\u003e330–425\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1996–2002\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eStern Drive; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L GM 350 V8\u003c\/td\u003e\n\u003ctd\u003e250–330\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eInboard; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e6.2L MX 377 V8\u003c\/td\u003e\n\u003ctd\u003e320–370\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eInboard; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e7.4L GM 454 V8\u003c\/td\u003e\n\u003ctd\u003e310–420\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988–2000\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eInboard; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e8.1L GM 496 V8\u003c\/td\u003e\n\u003ctd\u003e370–425\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eInboard; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e8.2L GM 502 V8\u003c\/td\u003e\n\u003ctd\u003e415–500\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1996–2000\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003eInboard; Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eVerado\u003c\/td\u003e\n\u003ctd\u003eMultiple\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2016\u003c\/td\u003e\n\u003ctd\u003e79023A91\u003c\/td\u003e\n\u003ctd\u003ePower steering motor fuse, Now 8M0207795\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eStarter and Alternator Fuse Assembly\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement with factory mounting\u003c\/dd\u003e\n  \u003cdt\u003eAmperage Rating\u003c\/dt\u003e\n\u003cdd\u003e90 Amp\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eThreaded stud terminals\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eBrass with plastic insulation\u003c\/dd\u003e\n  \u003cdt\u003eMounting Hole Diameter\u003c\/dt\u003e\n\u003cdd\u003e10 mm (13\/32 inch)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 90 Amp Starter Fuse Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the battery terminals to prevent electrical shorts. Start with the negative (-) terminal, followed by the positive (+).\u003c\/li\u003e\n\u003cli\u003eLocate the existing fuse assembly. It is typically found on or near the engine starter motor.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the nuts securing the main power cables to the fuse assembly's threaded studs.\u003c\/li\u003e\n\u003cli\u003eUnbolt the fuse assembly from its mounting point.\u003c\/li\u003e\n\u003cli\u003eMount the new fuse assembly in the same location, ensuring it is secure.\u003c\/li\u003e\n\u003cli\u003eClean the cable terminals before reattaching them to the new fuse studs. Re-secure with the nuts, ensuring a tight connection.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery, starting with the positive (+) terminal, then the negative (-). Check for proper function.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if my 90 Amp fuse is blown?\u003c\/summary\u003e\n\u003cp\u003eA common symptom of a blown fuse is a complete loss of electrical power to the engine's starting system. The engine will not crank or turn over, and you may hear a single click from the starter solenoid. Visually inspect the fuse for a break in the internal metal link.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhere is this fuse typically located on a MerCruiser engine?\u003c\/summary\u003e\n\u003cp\u003eThis 90 Amp fuse assembly is almost always mounted directly on the starter motor or on a bracket very close to it. It serves as the main protection for the cranking circuit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eMy boat has two of these fuses. Why?\u003c\/summary\u003e\n\u003cp\u003eOn certain engine setups, one fuse is used for the main engine starter circuit, while a second, identical fuse is used to protect the power steering pump motor circuit, especially on models with electric-hydraulic power steering like some Verado applications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs there a difference in performance between this aftermarket fuse and the OEM version?\u003c\/summary\u003e\n\u003cp\u003eFunctionally, there is no difference. Our aftermarket fuse is designed to meet or exceed original equipment manufacturer (OEM) specifications for amperage rating, materials, and durability. It provides the same level of circuit protection as the original MerCruiser part.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat happens if I use a fuse with a different amperage rating?\u003c\/summary\u003e\n\u003cp\u003eUsing a fuse with a lower rating will likely result in it blowing unnecessarily under normal cranking loads. Using a fuse with a higher rating is extremely dangerous, as it can fail to protect the circuit, leading to a potential fire or catastrophic damage to the starter or wiring.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the purpose of the new 8M0207795 part number?\u003c\/summary\u003e\n\u003cp\u003eMercury\/MerCruiser often updates or supersedes part numbers over time due to minor manufacturing changes, supplier updates, or consolidation. The part number 8M0207795 is the current official replacement for the older 79023A91 and 88-79023A91, and it is functionally identical.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718268129595,"sku":"C35JuW4T420","price":19.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/C35JuW4T420.png?v=1762958620","url":"https:\/\/seasierra.com\/products\/90-amp-fuse-assembly-fits-mercruiser-3-0l-8-2l-replaces-79023a91-88-79023a91-8m0207795","provider":"SeaSierra","version":"1.0","type":"link"}