{"product_id":"high-output-alternator-for-jeep-cherokee-comanche-wagoneer-1987-1990-4-0l","title":"High Output Alternator for Jeep Cherokee Comanche Wagoneer (1987-1990) 4.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Amp 250A Direct-Fit Alternator for 1987-1990 Jeep Cherokee, Comanche, Wagoneer (XJ\/MJ)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 250-amp high output alternator replaces the low-output factory charging unit on 1987-1990 Jeep vehicles to eliminate voltage drops and support high-draw electrical accessories without taxing the battery.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jeep Cherokee, Comanche, Wagoneer Charging Deficit\u003c\/h3\u003e\n\u003cp\u003eFactory charging systems on the \u003cstrong\u003eXJ\u003c\/strong\u003e and \u003cstrong\u003eMJ\u003c\/strong\u003e platforms rely on stock alternators rated between 66 and 85 amps. When running auxiliary equipment such as high-tonnage recovery winches, high-output off-road LED arrays, upgraded audio systems, or electric radiator fans, current draw exceeds stator capacity. This causes voltage sag down below 12.0 volts at curb idle, excessive diode heat soak, continuous deep-cycling of the starting battery, dimming headlights, and premature starter degradation on the \u003cstrong\u003eAMC 242 4.0L\u003c\/strong\u003e inline-six engine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 250-amp heavy-duty charging unit delivers solid amperage across both idle and open-throttle operation. Engineered with heavy-gauge pure copper stator windings, a high-temp dynamic balanced rotor, and low-friction sealed bearings, this unit mitigates heat build-up under sustained electrical load. It features an integrated internal voltage regulator set for a constant 13.5 to 14.5 volts and drops directly into the OEM engine brackets with matched rotation, correct pulley offset, and a factory-matched harness plug requiring no core charge or casing alterations.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x 250 Amp High Output Alternator (Part # 7897)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1987-1990 Jeep Cherokee, Comanche, Wagoneer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eAMC 242 4.0L I6 \/ XJ, MJ\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e177 hp \/ 224 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e321-353, 334-2342, JR775126, 7902611, 7897-11, 7897N, 7897-11N\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1987-1990 Jeep Cherokee (XJ) 4.0L Inline-6\u003c\/li\u003e\n  \u003cli\u003e1987-1990 Jeep Comanche (MJ) 4.0L Inline-6\u003c\/li\u003e\n  \u003cli\u003e1987-1990 Jeep Wagoneer (XJ Chassis) 4.0L Inline-6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the XJ and MJ Cherokee, Comanche, Wagoneer?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct bolt-on fit for 1987-1990 models equipped with the \u003cstrong\u003eAMC 242 4.0L\u003c\/strong\u003e Renix inline-six engine; it does not fit 2.5L four-cylinder or 2.8L V6 engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my vehicle wiring when running a 250-amp alternator?\u003c\/h4\u003e\n\u003cp\u003eWhile this alternator features a direct-fit plug, performing a Big 3 wiring upgrade (battery power, chassis ground, and engine block ground to 0-gauge or 4-gauge cables) is strongly recommended to safely carry the full 250-amp capacity without bottlenecking.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jeep Off-Road Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle sustained trail recovery operations, severe vibration, and extreme overland duty cycles, this high-output alternator delivers uncompromised reliability so your Jeep stays fully powered in rough backcountry terrain.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67898763280632,"sku":"DS-EMFWX395S","price":337.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-jeep-cherokee-comanche-wagoneer-1987-1990-4-0l-1.jpg?v=1793327384","url":"https:\/\/performancechiptuning.com\/de\/products\/high-output-alternator-for-jeep-cherokee-comanche-wagoneer-1987-1990-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}