{"product_id":"borg-warne-8","title":"Borg Warner — Shift Spool O-Ring Velvet Drive 71C 72C — 4804H","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Borg Warner \/ Velvet Drive 4804H is a small but important control valve shift spool O-ring used in classic Velvet Drive hydraulic marine transmissions. It seals the shift valve spool inside the outer control head assembly and is commonly replaced to correct transmission fluid weeping from behind the external gear-selector shift lever. This O-ring is a practical service part for leak repair around the selector shaft area on many Borg Warner and Velvet Drive 71C, 72C, and related marine gearboxes.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePart number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4804H\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eComponent type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Control valve \/ shift spool O-ring\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStandard size reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e BS210 \/ AS568-210 style imperial O-ring\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eApproximate dimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 3\/4\" I.D. x 1\/8\" cross section\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMetric reference dimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 18.64 mm I.D. x 3.53 mm cross section, approximately 25.7 mm O.D.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eApplication location:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Internal hydraulic shift valve \/ control spool spindle\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSystem location:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Transmission outer control head \/ gear-selector assembly\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaterial type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Oil-resistant rubber compound such as nitrile or Viton, depending on supplier\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eService purpose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps stop transmission fluid leakage at the external shift lever area\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eTransmission Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis O-ring is commonly associated with classic Borg Warner \/ Velvet Drive hydraulic-shift marine transmissions, including many:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eVelvet Drive 71C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eVelvet Drive 72C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eVelvet Drive 73C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1004 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1005 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1013 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1014 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1017 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1018 series marine transmission housings\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFitment should be confirmed by transmission model, control head layout, and parts diagram before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eFitment Notice\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eConfirm the transmission model tag, control head style, and selector-valve parts breakdown before installation. This O-ring fits the shift spool\/control valve location and should not be confused with the neutral safety switch plate gasket, output seal, input seal, pump gasket, or full transmission overhaul seal kit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf the transmission has been rebuilt, converted, or fitted with a non-original control head, compare the old O-ring and spool dimensions before reassembly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eWhen This Part Needs Replacement\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplace this O-ring when automatic transmission fluid weeps from the shift lever\/control head area, leaves red oil staining around the selector shaft, or returns after cleaning the outside of the transmission. It should also be replaced any time the control valve or neutral safety switch plate is removed for service.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA hardened, flattened, cut, swollen, or brittle O-ring can no longer seal the shift spool properly and may allow fluid to migrate out behind the external shift arm.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eInstallation Notes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUse care when removing the external shift arm and control head components. The selector mechanism may contain a small detent ball and spring that can fall out during disassembly. Work over a clean tray or protected bilge area so small parts are not lost.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAfter removing the shift arm and neutral safety switch housing plate, the shift control valve can be moved carefully to expose the O-ring. Lubricate the replacement O-ring with clean transmission fluid before installation and avoid cutting it on sharp edges. Do not reuse the old neutral safety switch plate gasket if the cover has been removed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eInspect the shift shaft, control spool bore, mounting plate gasket surface, detent spring, ball, fasteners, and neutral safety switch components while the assembly is apart.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eAlternate\/Cross-Reference Part Numbers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBorg Warner \/ Velvet Drive:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4804H\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePCM \/ Crusader reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e R047010\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAlto reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 010210B\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eO-ring size reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e BS210 \/ AS568-210\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRelated gasket often serviced at the same time:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Neutral safety switch plate gasket 11006 \/ L4-147\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eParts Desk Insight\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is a small part, but it is often the source of a very visible Velvet Drive leak. If the oil is coming from behind the shift lever rather than from the input, output, or pan area, the shift spool O-ring is one of the first service points to inspect. Pairing it with the neutral safety switch plate gasket helps avoid having to reopen the control head for a second leak.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eShipping:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/span\u003e\u003c\/p\u003e","brand":"BOR","offers":[{"title":"Default Title","offer_id":43563779227684,"sku":"4804H","price":2.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/857a35ed-15de-4068-b915-42ef367ab7e7.png?v=1782450730","url":"https:\/\/marisolmarine.com\/products\/borg-warne-8","provider":"Marisol Marine Company","version":"1.0","type":"link"}