{"product_id":"merc-1112","title":"Mercury MerCruiser Lower Swivel Pin | 8M0073409","description":"\u003ch2\u003eMercury MerCruiser Lower Swivel Pin | Part 8M0073409\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 8M0073409\u003cbr\u003e\n\u003cstrong\u003eFull Part Reference:\u003c\/strong\u003e 17-8M0073409\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Marine \/ Quicksilver\u003cbr\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Swivel Pin — Lower\u003cbr\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Sterndrive Hardware \u0026amp; Fasteners\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat It Does\u003c\/h2\u003e\n\u003cp\u003eThe lower swivel pin is a structural pivot component in the MerCruiser sterndrive tilt and swivel assembly. It passes through the swivel bracket and transom assembly to allow the drive unit to pivot for steering and trim. This pin carries significant load during operation and must be in good condition to maintain proper drive alignment, steering response, and tilt function. A worn, corroded, or bent swivel pin can cause play in the drive, imprecise steering, or binding during trim operation.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSystem\u003c\/h2\u003e\n\u003cp\u003eMerCruiser sterndrive tilt\/swivel and transom assembly. The lower swivel pin is part of the swivel bracket system that connects the drive unit to the transom plate, allowing the drive to pivot both for steering (side-to-side) and trim (up-and-down). It works in conjunction with the upper swivel pin, swivel bracket bushings, and related hardware.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eAlways verify fit using your drive model number and serial number against the current Mercury parts diagram. Swivel pin dimensions and specifications can vary between drive generations and production ranges.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMerCruiser Alpha One sterndrive — confirm by serial number range\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo series sterndrives — confirm by model and serial number\u003c\/li\u003e\n\u003cli\u003eMerCruiser transom assemblies using part reference 17-8M0073409 in the parts diagram\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSerial Requirements\u003c\/h2\u003e\n\u003cp\u003eSwivel pin specifications (diameter, length, and finish) can vary between MerCruiser drive generations and production date ranges. Always locate your drive's model number and serial number (on the drive unit data plate) and cross-reference part number 17-8M0073409 in the current Mercury parts diagram before ordering. Do not order by appearance alone.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensions\u003c\/h2\u003e\n\u003cp\u003eExact dimensions vary by application. Confirm against the Mercury parts diagram for your specific drive model and serial number. Do not substitute based on visual similarity — pin diameter and length tolerances are critical for proper fit and load bearing.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cp\u003eTypically inspected or replaced at the same time as the lower swivel pin:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-1069\"\u003eMercury MerCruiser Quicksilver Bravo 3 Lower Unit Gear Housing Complete 8M0046738\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/merc-133\"\u003eMercury – Upper Gearcase Seal Kit – 26-32511A1\u003c\/a\u003e — inspect seals when servicing swivel assembly\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-272\"\u003eMercury Mariner Lower Unit Gear Housing Seal Kit – 26-43035A4\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-499\"\u003eMercury MerCruiser Quicksilver Bravo Lower Gear Case Seal Kit 76868A04\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/merc-667\"\u003eMercury MerCruiser Quicksilver Gear Housing Seal Kit 816575A3\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cp\u003eInspect the lower swivel pin annually or whenever the drive is removed from the transom. Replace if there is visible corrosion, pitting, bending, or measurable wear beyond manufacturer tolerances. Do not reuse a pin that shows signs of galling or deformation. Lubricate the pin and swivel bracket bushings with the appropriate marine grease at each annual service.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClean the swivel bracket bore and inspect bushings before installing the new pin — worn bushings will cause premature pin wear even with a new pin installed\u003c\/li\u003e\n\u003cli\u003eApply marine-grade corrosion-resistant grease to the pin before installation\u003c\/li\u003e\n\u003cli\u003eFollow the Mercury service manual for correct installation direction, retaining hardware torque, and cotter pin or clip requirements\u003c\/li\u003e\n\u003cli\u003eInspect the transom plate and swivel bracket for cracks or corrosion damage while the pin is removed\u003c\/li\u003e\n\u003cli\u003eDo not use anti-seize compounds unless specified by the service manual — some pin installations require specific lubrication types\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if my lower swivel pin needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nSigns include excessive play or slop in the drive unit when pushed side-to-side, binding or stiffness during trim operation, visible corrosion or pitting on the pin, or difficulty removing the pin during service. Any measurable wear beyond the service manual tolerance requires replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I reuse the old pin if it looks okay?\u003c\/strong\u003e\u003cbr\u003e\nOnly if it measures within the service manual's wear limits and shows no corrosion, bending, or surface damage. When in doubt, replace it — the cost of a new pin is far less than the consequences of a failed swivel assembly on the water.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need to replace the bushings at the same time?\u003c\/strong\u003e\u003cbr\u003e\nYes, in most cases. If the pin shows wear, the bushings are almost certainly worn as well. Installing a new pin into worn bushings will accelerate wear on the new pin and will not restore proper drive alignment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this the same as the upper swivel pin?\u003c\/strong\u003e\u003cbr\u003e\nNo. The upper and lower swivel pins are separate parts with different dimensions. Confirm you are ordering the correct position (lower) for your application using the parts diagram.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Annual sterndrive service or any time the drive is removed from the transom for maintenance. This is also the correct part when diagnosing excessive drive play, steering slop, or trim binding on MerCruiser sterndrive boats. Shops performing full transom assembly rebuilds should stock both upper and lower swivel pins along with the swivel bracket bushing set.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon mistakes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrdering without confirming the serial number range\u003c\/strong\u003e — swivel pin dimensions vary between drive generations. A pin that looks identical may have a different diameter or length. Always verify against the parts diagram for the specific drive serial number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacing the pin without replacing the bushings\u003c\/strong\u003e — worn bushings will destroy a new pin quickly. Always inspect and replace bushings as a set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfusing upper and lower swivel pins\u003c\/strong\u003e — they are different parts. Confirm the diagram position (lower) before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkipping lubrication\u003c\/strong\u003e — the swivel pin and bushings must be properly greased at installation and at each annual service. Dry pins corrode and seize rapidly in a marine environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot inspecting the swivel bracket\u003c\/strong\u003e — a cracked or corroded bracket will cause the new pin to fail prematurely. Inspect the full assembly while the pin is out.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563912527908,"sku":"8M0073409","price":89.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/17ec4658-b82b-494c-a58d-f50f7c97b370.png?v=1787257548","url":"https:\/\/marisolmarine.com\/products\/merc-1112","provider":"Marisol Marine Company","version":"1.0","type":"link"}