{"product_id":"pto-clutch-603078","title":"603078 PTO Clutch Replacement for Encore Xtreme \u0026 Z Series | 1-Inch Bore","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eEncore 603078 PTO clutch replacement\u003c\/strong\u003e is an aftermarket electric clutch for select \u003cstrong\u003eEncore X-Treme\u003c\/strong\u003e and \u003cstrong\u003eZ Series\u003c\/strong\u003e zero-turn mowers. Factory application references include specific \u003cstrong\u003e52-inch and 60-inch X-Treme models\u003c\/strong\u003e and the \u003cstrong\u003e60K25Z\u003c\/strong\u003e Z Series mower.\u003c\/p\u003e\n\u003cp\u003eBuilt with a \u003cstrong\u003e1-inch crankshaft bore\u003c\/strong\u003e, \u003cstrong\u003e7.20-inch black pulley\u003c\/strong\u003e and \u003cstrong\u003ecounter-clockwise rotation\u003c\/strong\u003e, this clutch replaces the electric mower deck engagement assembly when the original part number and installation configuration match.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAftermarket replacement for the \u003cstrong\u003eEncore 603078\u003c\/strong\u003e clutch application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft Bore:\u003c\/strong\u003e 1 inch \/ 1.000 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Diameter:\u003c\/strong\u003e 7.20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Finish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation:\u003c\/strong\u003e CCW, viewed from the pulley side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Width:\u003c\/strong\u003e 1\/2-inch or 5\/8-inch belt applications\u003c\/li\u003e\n\u003cli\u003eComplete clutch assembly with installed bearings and integrated brake\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Connection:\u003c\/strong\u003e Connector and wiring as shown in the product photos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatible Encore Models \u0026amp; Factory References\u003c\/h2\u003e\n\u003cp\u003eThe following Encore factory references identify \u003cstrong\u003e603078\u003c\/strong\u003e as the electric clutch. Match your complete mower model and original clutch before ordering, especially if the engine or wiring has been changed.\u003c\/p\u003e\n\u003ch3\u003eEncore X-Treme — 52-Inch Deck\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e52B25X\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e52K23X\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e52K26X\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEncore X-Treme — 60-Inch Deck\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e60B25X\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e60K25X\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEncore Z Series — 60-Inch Deck\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e60K25Z\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEncore's \u003ca href=\"https:\/\/encoreequipment.com\/wp-content\/uploads\/2012\/06\/Encore-Quick-Reference-Manual.pdf#page=30\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003efactory quick-reference manual\u003c\/strong\u003e\u003c\/a\u003e lists 603078 for \u003cstrong\u003e60K25Z on PDF page 30\u003c\/strong\u003e and for \u003cstrong\u003e52B25X, 52K23X, 60B25X and 60K25X on PDF pages 33–36\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFor \u003cstrong\u003e52K26X\u003c\/strong\u003e, see the \u003ca href=\"https:\/\/encoreequipment.com\/wp-content\/uploads\/2016\/06\/X-Treme-Parts-Manual-52K26X-6-2016.pdf#page=13\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003efactory drive diagram and parts list\u003c\/strong\u003e\u003c\/a\u003e: printed pages \u003cstrong\u003eE-1 and E-2\u003c\/strong\u003e, PDF pages \u003cstrong\u003e13–14\u003c\/strong\u003e, \u003cstrong\u003eitem 26\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e Other Encore configurations use different clutches. Do not extend these references to every X-Treme or Z Series mower.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplacement \u0026amp; Cross-Reference Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEncore OEM Reference:\u003c\/strong\u003e 603078\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftermarket Catalog Reference:\u003c\/strong\u003e Xtreme X0017 \/ Stens X0017\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRelated Toro \/ Exmark application:\u003c\/strong\u003e Encore 603078 and Toro \/ Exmark 103-0690 appear in the same aftermarket replacement family. View our \u003ca href=\"\/products\/pto-clutch-103-0690\"\u003e\u003cstrong\u003ededicated 103-0690 PTO clutch listing\u003c\/strong\u003e\u003c\/a\u003e for additional Toro and Exmark replacement references.\u003c\/p\u003e\n\u003cp\u003eCross-reference numbers identify the replacement application. This product is our standard black pulley aftermarket clutch.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eConnector \u0026amp; Installation Check\u003c\/h2\u003e\n\u003cp\u003eThe Encore 52K26X manual lists \u003cstrong\u003e603083\u003c\/strong\u003e separately as a \u003cstrong\u003eclutch adapter harness\u003c\/strong\u003e. That harness number is not a clutch replacement number. Compare your mower-side plug with our product photos and retain or replace the appropriate adapter as needed.\u003c\/p\u003e\n\u003cp\u003eFollow the mower and clutch installation instructions for the shaft key, spacers, retaining hardware, pulley alignment and anti-rotation restraint. Secure the clutch wiring clear of the belt and moving parts.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOne complete electric PTO clutch assembly\u003c\/li\u003e\n\u003cli\u003e7.20-inch black pulley, installed bearings and integrated brake\u003c\/li\u003e\n\u003cli\u003eElectrical connector and wiring as pictured\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA separate Encore 603083 adapter harness and installation hardware are included only if expressly shown or specified with the selected product.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy From PTO Direct USA?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFast USA shipping\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/fitment-guarantee\"\u003e\u003cstrong\u003eFitment guarantee\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/warranty\"\u003e\u003cstrong\u003e1-year limited warranty\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eClear product photos for clutch and connector identification\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFitment support before and after purchase.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eDoes this replace Encore 603078?\u003c\/h3\u003e\n\u003cp\u003eYes, for applications matching the listed clutch number, dimensions, connector and mounting configuration.\u003c\/p\u003e\n\u003ch3\u003eDoes this fit every 52-inch or 60-inch Encore mower?\u003c\/h3\u003e\n\u003cp\u003eNo. Confirm the complete model and original clutch number. The factory applications listed above are specific examples.\u003c\/p\u003e\n\u003ch3\u003eIs 603078 related to Toro \/ Exmark 103-0690?\u003c\/h3\u003e\n\u003cp\u003eYes. Aftermarket catalogs group both numbers under X0017. The \u003ca href=\"\/products\/pto-clutch-103-0690\"\u003e103-0690 listing\u003c\/a\u003e covers the related Toro and Exmark references; this page focuses on Encore.\u003c\/p\u003e\n\u003ch3\u003eWill this fit a 1-1\/8-inch crankshaft?\u003c\/h3\u003e\n\u003cp\u003eNo. This clutch requires a \u003cstrong\u003e1-inch crankshaft\u003c\/strong\u003e. Confirm the shaft size if the engine has been replaced.\u003c\/p\u003e\n\u003ch3\u003eCan you help confirm my clutch?\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003eContact PTO Direct USA\u003c\/a\u003e with your mower model, serial number and clear photos of the original clutch label, pulley, connector and mounting arrangement. Email \u003cstrong\u003esupport@ptodirectusa.com\u003c\/strong\u003e or text photos to \u003cstrong\u003e(541) 361-8778\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eNeed installation help? Read our \u003ca href=\"\/blogs\/pto-clutch-guides\/pto-clutch-installation\"\u003e\u003cstrong\u003ePTO clutch installation guide\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNeed another application? Browse the full \u003ca href=\"\/collections\/pto-clutches\"\u003e\u003cstrong\u003eelectric PTO clutch catalog\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e","brand":"PTO Direct USA","offers":[{"title":"Default Title","offer_id":67732364132719,"sku":"PTO-603078-ECP-102421","price":178.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/603078-pto-clutch-fresh.jpg?v=1791683511","url":"https:\/\/ptodirectusa.com\/products\/pto-clutch-603078","provider":"PTO Direct USA","version":"1.0","type":"link"}