{"product_id":"merc-474","title":"Mercury Quicksilver — Thumb Screw Washer — 73719, Replaced by 818884","description":"\u003ch2\u003eMercury Quicksilver Thumb Screw Washer 73719\u003c\/h2\u003e\n\u003cp\u003eMercury Quicksilver 73719 is an OEM thumb screw washer used in the clamp-bracket assembly on various Mercury outboard engines. It fits the transom clamp thumb-screw assembly and is retained by the associated attaching or shoulder screw. Mercury has superseded part number 73719 to current replacement 818884.\u003c\/p\u003e\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect Mercury 4.5 HP outboards\u003c\/li\u003e\n\u003cli\u003eSelect Mercury 9.9 HP outboards\u003c\/li\u003e\n\u003cli\u003eSelect Mercury 20 HP and Model 200 applications\u003c\/li\u003e\n\u003cli\u003eAdditional Mercury outboards whose clamp-bracket diagram specifies 73719 or replacement 818884\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment notice:\u003c\/strong\u003e Confirm the engine serial number and clamp-bracket diagram before ordering. Mercury used several thumb-screw washer and retaining arrangements across similar clamp brackets.\u003c\/p\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal part number:\u003c\/strong\u003e 73719\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal catalog number:\u003c\/strong\u003e 12-73719\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent replacement:\u003c\/strong\u003e 818884\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement catalog number:\u003c\/strong\u003e 12-818884\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Quicksilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Transom clamp thumb screw washer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical quantity:\u003c\/strong\u003e Two washers per applicable clamp-bracket assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OEM clamp-bracket component\u003c\/li\u003e\n\u003cli\u003eUsed in the transom clamp thumb-screw assembly\u003c\/li\u003e\n\u003cli\u003eCurrent service replacement is Mercury 818884\u003c\/li\u003e\n\u003cli\u003eApplication-specific washer rather than general-purpose flat hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace This Washer\u003c\/h3\u003e\n\u003cp\u003eReplace the washer if it is missing, bent, cracked, distorted, heavily worn, damaged around the retaining-screw attachment point, or no longer seats correctly after removal. A damaged washer can prevent the clamp screw from bearing evenly against the transom.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eInspect the complete thumb-screw assembly while servicing this washer. Associated diagrams commonly show it with attaching or shoulder screw 768042 and an application-specific thumb-screw assembly such as 92767A1. Confirm the exact clamp-bracket configuration before replacing individual components.\u003c\/p\u003e\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan original part 73719 still be used for lookup?\u003c\/strong\u003e\u003cbr\u003eYes. Mercury superseded 73719 to current replacement 818884, so either number may appear in application references.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a general-purpose flat washer?\u003c\/strong\u003e\u003cbr\u003eNo. It is a component of specified Mercury outboard transom clamp thumb-screw assemblies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many washers are required?\u003c\/strong\u003e\u003cbr\u003eMany applicable diagrams show two washers per clamp-bracket assembly. Confirm the quantity on the exact serial-specific diagram.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Replacing missing, distorted, or worn thumb-screw washers when the clamp-bracket diagram specifies 73719 or current replacement 818884.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMost common mistake:\u003c\/strong\u003e Ordering by appearance alone or treating it as a standard flat washer. Similar clamp assemblies can use different retaining hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment guidance:\u003c\/strong\u003e Check the engine serial number, clamp-bracket diagram, required quantity, retaining screw, and complete thumb-screw assembly before ordering.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563870388260,"sku":"73719","price":2.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ee000aae-01fd-42ed-b0c5-07e9f53eb191_ca980239-1b53-4aa9-be47-3f8c6660f2b2.png?v=1790107147","url":"https:\/\/marisolmarine.com\/products\/merc-474","provider":"Marisol Marine Company","version":"1.0","type":"link"}