{"product_id":"merc-211","title":"Mercury MerCruiser Quicksilver — Shift Crank Gear Housing Pin — Alpha One \u0026 Gen II — 379721","description":"\u003ch2\u003eMercury MerCruiser Quicksilver Shift Crank Gear Housing Pin 379721 | Alpha One \u0026amp; Gen II\u003c\/h2\u003e\u003cp\u003eThe Mercury MerCruiser Quicksilver \u003cstrong\u003e379721\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003eshift-crank pin\u003c\/strong\u003e used inside the gear housing of select MerCruiser sterndrives. It is part of the lower-unit shift mechanism and provides the factory locating and pivot point the shift crank needs to operate properly. Mercury lists 379721 as the current replacement for the earlier pin \u003cstrong\u003e37972\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine OEM part\u003c\/li\u003e\n\u003cli\u003ePart number: \u003cstrong\u003e379721\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFull service number: \u003cstrong\u003e17-379721\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct type: \u003cstrong\u003eShift Crank Gear Housing Pin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSystem: Sterndrive gear housing, shift mechanism\u003c\/li\u003e\n\u003cli\u003eQuantity: \u003cstrong\u003e1 per applicable gear housing\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eGTIN: \u003cstrong\u003e745061140097\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCurrent active Mercury service part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser R and MR\u003c\/strong\u003e sterndrives\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAlpha One Gen I\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAlpha One Gen II\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eStandard- and counter-rotation gear housings where 379721 is specified\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSerial Number Fitment Notice\u003c\/h3\u003e\u003cp\u003eConfirm the sterndrive model, serial number and gear-housing diagram before ordering. This pin is widely used, but lower-unit configurations changed across R, MR, Alpha One and Alpha One Gen II production.\u003c\/p\u003e\u003ch3\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\u003cp\u003eReplace the pin if it is bent, worn, corroded, loose or damaged during gear-housing service. Excessive wear in the shift-crank mechanism can contribute to poor or inconsistent gear engagement.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eInstall the pin in the original shift-crank position within the gear housing. Inspect the surrounding shift components and gear-housing hardware while the lower unit is apart, and follow the applicable Mercury service procedure when reassembling the shift system.\u003c\/p\u003e\u003ch3\u003eRelated Parts\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5356A4\u003c\/strong\u003e — gear housing assembly, earlier R, MR and Alpha One applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e815822A36\u003c\/strong\u003e — Alpha One Gen II gear housing assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8M0204680\u003c\/strong\u003e — gear housing seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e46911 \/ 56298\u003c\/strong\u003e — gear housing mounting studs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAlternate \u0026amp; Superseded Part Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e379721 \/ 17-379721\u003c\/strong\u003e — current OEM number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e37972 \/ 17-37972\u003c\/strong\u003e — superseded by 379721\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDoes 379721 replace 37972?\u003c\/strong\u003e\u003cbr\u003eYes. Mercury lists 379721 as the current replacement for 37972.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it fit both Alpha One Gen I and Gen II?\u003c\/strong\u003e\u003cbr\u003eYes, where the gear-housing diagram specifies 379721. It also appears in earlier R and MR drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it work in counter-rotation gear housings?\u003c\/strong\u003e\u003cbr\u003eYes, in standard- and counter-rotation housings where 379721 is specified.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest use:\u003c\/strong\u003e Replacing a worn or damaged shift-crank pin during Alpha One, Gen II, R or MR gear-housing service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMost common mistake:\u003c\/strong\u003e Reassembling the lower unit without checking this small pin. A worn pin can cause sloppy or inconsistent shifting and mean reopening the drive later.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSizing and fitment:\u003c\/strong\u003e Confirm your drive model, serial number and gear-housing diagram. If your diagram lists 37972, 379721 is the correct current replacement.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563856035876,"sku":"37972","price":1.45,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/download_1f71a387-7359-434e-9af4-f77a4918c911.png?v=1790289079","url":"https:\/\/marisolmarine.com\/products\/merc-211","provider":"Marisol Marine Company","version":"1.0","type":"link"}