{"product_id":"merc-158","title":"Mercury MerCruiser 3\/8\"-16 Hex Head Screw - 10-34353","description":"\u003cp\u003eThe Mercury MerCruiser Quicksilver \u003cstrong\u003e10-34353\u003c\/strong\u003e is a genuine Mercury Marine OEM \u003cstrong\u003ehex head screw\u003c\/strong\u003e used as diagram-specific mounting hardware on select MerCruiser engines, sterndrives, accessory brackets, pulley assemblies, seawater pump mounts, alternator brackets, and related engine hardware locations. This fastener is used where the Mercury\/MerCruiser parts diagram specifically calls for \u003cstrong\u003e34353 \/ 10-34353\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine factory OEM hex head screw.\u003c\/li\u003e\n\u003cli\u003eMercury\/MerCruiser part number: \u003cstrong\u003e10-34353\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eManufacturer\/base part number: \u003cstrong\u003e34353\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThread size: \u003cstrong\u003e3\/8\"-16 coarse thread\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eLength: \u003cstrong\u003e1.00 in.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eStandard hex-head cap screw style fastener.\u003c\/li\u003e\n\u003cli\u003eUsed in select MerCruiser engine, bracket, pump, pulley, and drive-related assemblies where specified by diagram.\u003c\/li\u003e\n\u003cli\u003eSuitable for replacing missing, corroded, damaged, rounded, or incorrect hardware in factory-specified locations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon application context includes select MerCruiser gasoline and diesel engines by serial number and diagram location, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser 120 \/ 140 \/ 2.5L \/ 3.0L\u003c\/strong\u003e inline-4 applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser 4.3L \/ 4.3LX \/ 4.3LH\u003c\/strong\u003e V6 applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser 5.0L \/ 5.7L \/ 350 MAG \/ 350 MAG MPI\u003c\/strong\u003e small-block V8 applications where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eAlpha and Bravo\u003c\/strong\u003e engine package accessory mounting locations where specified\u003c\/li\u003e\n\u003cli\u003eSelect big-block MerCruiser applications including \u003cstrong\u003e330 HP, 340 MIE, 370 TRS, 400 TRS, and 454 MAG MPI\u003c\/strong\u003e where specified\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eD7.3L D-Tronic 300\u003c\/strong\u003e diesel applications where the diagram calls for this fastener\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this screw only where the Mercury\/MerCruiser parts diagram specifically calls for \u003cstrong\u003e10-34353 \/ 34353\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by engine serial number, assembly diagram, bracket location, thread size, bolt length, and required fastener grade before ordering. MerCruiser engines often use similar-looking screws in different lengths, thread pitches, coatings, and strength ratings depending on the accessory bracket, pump housing, pulley, alternator mount, or engine block location.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this screw if the original fastener is missing, seized, corroded, stretched, rounded, cross-threaded, or no longer clamps the component securely. It should also be replaced if incorrect hardware was previously installed, especially on accessory brackets, pump mounts, pulleys, and engine-mounted components exposed to vibration and heat.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eVerify the mounting hole threads are clean and undamaged before installation. Compare the removed fastener to the replacement screw for thread pitch, length, head style, and shoulder\/contact area. Use the correct Mercury service manual torque specification for the exact assembly location. Do not substitute a longer screw in blind holes, as it can bottom out before the component is properly clamped.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-34353\u003c\/strong\u003e — Mercury\/MerCruiser formatted part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e34353\u003c\/strong\u003e — Mercury\/MerCruiser base part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF1867\u003c\/strong\u003e — earlier factory reference; verify by diagram and application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF2202\u003c\/strong\u003e — earlier factory reference; verify by diagram and application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eSmall engine fasteners matter because length, thread pitch, coating, and strength rating affect how the part clamps under heat and vibration. For brackets, pulleys, alternators, and seawater pump mounts, matching the factory hardware helps prevent loose components, misalignment, broken brackets, and repeat service issues.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563854037028,"sku":"34353","price":3.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/993889d3-dedd-44ab-af0f-9099a211e0da.png?v=1781138610","url":"https:\/\/marisolmarine.com\/products\/merc-158","provider":"Marisol Marine Company","version":"1.0","type":"link"}