{"product_id":"sei-se421-lower-unit-fits-yamaha-76-v6-200-250-hp-replaces-65j-45300-21-8d","title":"SEI SE421 Lower Unit – Fits Yamaha 76° V6 200–250 HP (Replaces 65J-45300-21-8D)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\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 *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\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\n\u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis is a complete aftermarket \u003cstrong\u003eSEI SE421 Lower Unit\u003c\/strong\u003e, engineered as a direct replacement for Yamaha 76° V6 2-Stroke engines, including 3.1L and 3.2L models from 1990 to 2005. It features a standard right-hand rotation, a 1.81:1 gear ratio, and fits models with a 25\" shaft length.\u003c\/p\u003e\n    \u003cp\u003eThis assembly serves as a direct interchange for Yamaha OEM part numbers 65J-45300-21-8D and 60V-45300-20-8D, ensuring a precise and reliable fit.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eProvides a direct bolt-on installation with no modifications required.\u003c\/li\u003e\n        \u003cli\u003eConstructed from marine-grade aluminum and finished with a paintable black primer.\u003c\/li\u003e\n        \u003cli\u003eBacked by an industry-leading 3-Year No-Fault Warranty for peace of mind.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\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\u003eNotes\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSEI\u003c\/td\u003e\n                    \u003ctd\u003e90-421-A25\u003c\/td\u003e\n                    \u003ctd\u003eThis Complete Lower Unit Assembly\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n                    \u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e60V-45300-20-8D\u003c\/td\u003e\n                    \u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\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 lower unit is compatible with the following Yamaha 2-stroke models.\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\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                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n\u003ctd\u003eZ250TXRD\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eZ250TXRC\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2004\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX225TXRB\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX250TXRB\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eZ250TXRB\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2003\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX225TXRA\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX250TXRA\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX225TXRZ\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX250TXRZ\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX225TXRY\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eSX250TXRY\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS225TXRX\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS250TXRX\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eV225TXRX\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS225TXRW\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS250TXRW\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS225TXRV\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS250TXRV\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS225TXRU\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1996\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eS250TXRU\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1996\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e225TXRT\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1995\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250TXRT\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1995\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e225TXRS\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250TXRS\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250TXRR\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250TXRQ\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1992\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250TXRP\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1991\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003e250ETXD\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1990\u003c\/td\u003e\n\u003ctd\u003e65J-45300-21-8D\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n    \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n    \u003cdl\u003e\n        \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eComplete Lower Unit \/ Gearcase Assembly\u003c\/dd\u003e\n        \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect bolt-on replacement\u003c\/dd\u003e\n        \u003cdt\u003eGear Ratio\u003c\/dt\u003e\n\u003cdd\u003e1.81:1\u003c\/dd\u003e\n        \u003cdt\u003eProp Rotation\u003c\/dt\u003e\n\u003cdd\u003eStandard Right-Hand\u003c\/dd\u003e\n        \u003cdt\u003eDrive Shaft Length\u003c\/dt\u003e\n\u003cdd\u003e25\" (635 mm)\u003c\/dd\u003e\n        \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMarine-grade aluminum\u003c\/dd\u003e\n        \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack primer (paintable)\u003c\/dd\u003e\n        \u003cdt\u003eCompatibility\u003c\/dt\u003e\n\u003cdd\u003eYamaha 76° V6 2-Stroke 3.1L \u0026amp; 3.2L engines\u003c\/dd\u003e\n        \u003cdt\u003eCooling System\u003c\/dt\u003e\n\u003cdd\u003eStandard side water intakes\u003c\/dd\u003e\n        \u003cdt\u003eProp Shaft\u003c\/dt\u003e\n\u003cdd\u003e15-spline\u003c\/dd\u003e\n        \u003cdt\u003eMax RPM\u003c\/dt\u003e\n\u003cdd\u003e5,500–6,000 (estimated)\u003c\/dd\u003e\n        \u003cdt\u003eProduct Dimensions\u003c\/dt\u003e\n\u003cdd\u003e129.0 cm x 22.0 cm x 76.0 cm\u003c\/dd\u003e\n        \u003cdt\u003eBox Dimensions\u003c\/dt\u003e\n\u003cdd\u003e129.0 cm x 22.0 cm x 76.0 cm\u003c\/dd\u003e\n        \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e3-Year No-Fault Warranty\u003c\/dd\u003e\n    \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e1 x Complete Lower Unit Assembly (90-421-A25)\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003eEnsure the engine is off and the battery is disconnected for safety. Drain the old gear lube completely.\u003c\/li\u003e\n        \u003cli\u003eCarefully unbolt and remove the old lower unit from the engine housing.\u003c\/li\u003e\n        \u003cli\u003eIt is critical to install a new water pump kit (sold separately) onto the new lower unit.\u003c\/li\u003e\n        \u003cli\u003eInstall a new anode kit (sold separately) to protect against corrosion.\u003c\/li\u003e\n        \u003cli\u003eAlign the driveshaft and shift shaft, then bolt the new lower unit securely to the engine.\u003c\/li\u003e\n        \u003cli\u003eFill the gearcase with fresh, high-quality marine gear lube according to manufacturer specifications before starting the engine.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n    \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWill this fit my Yamaha 250 HP 4-stroke?\u003c\/summary\u003e\n        \u003cp\u003eNo, this unit is specifically designed for Yamaha 76° V6 2-Stroke 3.1L \u0026amp; 3.2L engines from 1990–2005. It is not compatible with 4-stroke models.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eDoes this come pre-filled with gear lube?\u003c\/summary\u003e\n        \u003cp\u003eNo, the lower unit is shipped dry to prevent leaks during transit. You must fill it with the correct type and amount of gear lube before operation. We recommend the 88-102-01K Gear Lube and Pump Kit.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs my lower unit is failing?\u003c\/summary\u003e\n        \u003cp\u003eCommon signs include excessive vibration, grinding noises from the gearcase, difficulty or inability to shift gears, a milky or metallic appearance in the gear lube, or visible damage to the housing, skeg, or prop shaft.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat maintenance is required for this lower unit?\u003c\/summary\u003e\n        \u003cp\u003eWe recommend changing the gear lube and inspecting the water pump impeller annually or every 100 hours of use. You should also regularly inspect the anode and replace it when it is 50% corroded to protect the unit.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eIs the water pump included with this assembly?\u003c\/summary\u003e\n        \u003cp\u003eA water pump kit is not included. For reliability and to protect your warranty, we strongly recommend installing a new Water Pump Kit with Housing (part #96-416-01AK) when you install the new lower unit.\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 3-Year No-Fault 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\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\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\n","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50623297388859,"sku":"421-A25","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/421-A25_56910339-9027-48bc-98e2-146c0361aac6.jpg?v=1759630692","url":"https:\/\/seasierra.com\/products\/sei-se421-lower-unit-fits-yamaha-76-v6-200-250-hp-replaces-65j-45300-21-8d","provider":"SeaSierra","version":"1.0","type":"link"}