{"product_id":"borg-warne-5","title":"Borg Warner — Velvet Drive Output Flange — 4-Inch Coarse 10-Spline — 4547BA","description":"\u003ch2\u003eBorg Warner Velvet Drive Output Flange — 4-Inch Coarse 10-Spline — 4547BA\u003c\/h2\u003e\n\u003cp\u003eThe Borg Warner \/ Velvet Drive 4547BA is a 4-inch output flange coupling for applicable Velvet Drive 71C and 10-17 series marine transmissions. Its 10-tooth coarse spline connects the transmission output shaft to the propeller-shaft coupling, helping restore a secure driveline connection during transmission, seal, or shaft-alignment service.\u003c\/p\u003e\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVelvet Drive 71C marine transmissions using the 4-inch, 10-tooth coarse-spline output configuration.\u003c\/li\u003e\n\u003cli\u003eApplicable Velvet Drive 10-17 and 1017 family transmissions with the matching output shaft and flange arrangement.\u003c\/li\u003e\n\u003cli\u003eNot a universal fit for every Velvet Drive 71 or 72 series transmission. Confirm the transmission model, output flange diameter, spline count, and existing coupling configuration in the applicable service documentation before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Borg Warner \/ Velvet Drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 4547BA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial product type:\u003c\/strong\u003e Marine transmission output flange \/ coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Marine transmission and propeller-shaft driveline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange diameter:\u003c\/strong\u003e 4.00 in \/ 101.6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal spline:\u003c\/strong\u003e 10-tooth coarse spline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Four-bolt output flange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate references:\u003c\/strong\u003e W4547BA, BW4547BA, Crusader R148014, and PCM R148014\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReference Dimensions\u003c\/h3\u003e\n\u003cp\u003eThe following dimensions are published reference measurements for the equivalent Alto ALT23324 coupling:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub dimension:\u003c\/strong\u003e 1.375 in \/ 34.9 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal reference dimension:\u003c\/strong\u003e 1.184 in \/ 30.1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall reference dimension:\u003c\/strong\u003e 1.940 in \/ 49.3 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange hub diameter:\u003c\/strong\u003e 2.325 in \/ 59.1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt circle:\u003c\/strong\u003e 3.250 in \/ 82.6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt-hole reference:\u003c\/strong\u003e approximately 0.390 in \/ 9.9 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplacement and Related Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent replacement reference:\u003c\/strong\u003e Alto 23324 \/ ALT23324\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated rear output seal:\u003c\/strong\u003e 71C-110 \/ ALT23421\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelated coupling nut:\u003c\/strong\u003e 4775L \/ ALT23321\u003c\/li\u003e\n\u003cli\u003eA larger 5-inch coarse-spline coupling may be used on certain 72C configurations, but it is a different fitment and should not be substituted for this 4-inch flange.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment and Installation\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, compare the existing flange diameter, spline count, transmission model, and output-shaft arrangement. When replacing the flange, inspect the output-shaft splines, retaining nut, rear output seal, coupling face, and bolt holes. Clean the flange and propeller-shaft coupling faces, install the retaining hardware according to the applicable Velvet Drive service procedure, and complete final shaft alignment.\u003c\/p\u003e\n\u003ch3\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWorn or damaged internal splines\u003c\/li\u003e\n\u003cli\u003eExcessive movement between the flange and output shaft\u003c\/li\u003e\n\u003cli\u003eCorrosion or pitting at the rear seal contact surface\u003c\/li\u003e\n\u003cli\u003eA damaged or distorted coupling face\u003c\/li\u003e\n\u003cli\u003eDamaged bolt holes or flange hardware\u003c\/li\u003e\n\u003cli\u003ePersistent rear transmission oil leakage associated with a worn sealing surface\u003c\/li\u003e\n\u003cli\u003eDamage found during transmission removal or propeller-shaft alignment service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs 4547BA the 4-inch coarse-spline flange?\u003c\/strong\u003e Yes. The identifying configuration is a 4-inch flange with 10 internal coarse-spline teeth for applicable 71C and 10-17 applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWill this fit every Velvet Drive 71 or 72 transmission?\u003c\/strong\u003e No. Similar transmissions can use different flange diameters, spline counts, or output-shaft arrangements. Verify the existing assembly before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the aftermarket equivalent?\u003c\/strong\u003e Alto 23324, also referenced as ALT23324.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat should be inspected during installation?\u003c\/strong\u003e Check the output-shaft splines, retaining nut, rear output seal, flange face, bolt holes, and final propeller-shaft alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan the larger 5-inch 72C coupling be used instead?\u003c\/strong\u003e Not without confirming the complete transmission and driveline configuration. The larger coupling is a different fitment from this 4-inch 4547BA flange.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest use case:\u003c\/strong\u003e Replacing a worn or damaged 4-inch, 10-tooth coarse-spline output flange on an applicable Velvet Drive 71C or 10-17 transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMost common mistake:\u003c\/strong\u003e Matching the flange by diameter alone and overlooking the 10-tooth coarse spline or the transmission’s exact output configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment guidance:\u003c\/strong\u003e Confirm the 4-inch diameter, 10-spline count, transmission model, and existing coupling arrangement before ordering, especially when working on a Velvet Drive 72 or reduction transmission.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BOR","offers":[{"title":"Default Title","offer_id":43563779129380,"sku":"4547BA","price":310.84,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/97b45f6f-459b-448b-b3a6-fff1fb162309.png?v=1789763493","url":"https:\/\/marisolmarine.com\/products\/borg-warne-5","provider":"Marisol Marine Company","version":"1.0","type":"link"}