{"product_id":"mercury-896329821-spark-plug","title":"Mercury 896329821 Spark Plug L77JC4","description":"\u003ch2\u003eMercury 896329821 Spark Plug L77JC4\u003c\/h2\u003e\n\u003cp\u003eThe Mercury 896329821 spark plug is a genuine Mercury replacement spark plug listed as Champion L77JC4. It is used for OMC Stern Drive\/Cobra spark plug applications where L77JC4 \/ OMC 386941 is specified.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury replacement spark plug\u003c\/li\u003e\n\u003cli\u003eMercury part number 896329821\u003c\/li\u003e\n\u003cli\u003eChampion plug number L77JC4\u003c\/li\u003e\n\u003cli\u003eOMC reference part number 386941\u003c\/li\u003e\n\u003cli\u003ePackage quantity: 1\u003c\/li\u003e\n\u003cli\u003eListed for OMC Stern Drive\/Cobra spark plug service where specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake:\u003c\/strong\u003e OMC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Style:\u003c\/strong\u003e Inboard\/IO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e OMC Stern Drive\/Cobra applications using L77JC4 spark plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Use:\u003c\/strong\u003e Routine ignition maintenance and spark plug replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 896329821\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion Plug:\u003c\/strong\u003e L77JC4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMC Reference:\u003c\/strong\u003e 386941\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Spark Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecifics:\u003c\/strong\u003e Standard Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold As:\u003c\/strong\u003e One spark plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace Spark Plugs\u003c\/h3\u003e\n\u003cp\u003eSpark plugs should be inspected and replaced according to the engine maintenance schedule. Worn or fouled plugs can contribute to hard starting, rough idle, misfire, weak acceleration, and reduced ignition performance.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the correct spark plug number before installation.\u003c\/li\u003e\n\u003cli\u003eCheck and set the spark plug gap according to the service manual or engine decal.\u003c\/li\u003e\n\u003cli\u003eInstall using the proper torque specification for the engine.\u003c\/li\u003e\n\u003cli\u003eFor multi-cylinder engines, replacing the complete set during service is often recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment Reminder\u003c\/h3\u003e\n\u003cp\u003ePlease verify fitment by Mercury part number, Champion plug code, OMC reference number, engine model, and service information before ordering. If your manual or parts diagram calls for a different spark plug, use that specified part number instead.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is Mercury 896329821?\u003c\/h4\u003e\n\u003cp\u003eMercury 896329821 is a genuine Mercury spark plug listed as Champion L77JC4.\u003c\/p\u003e\n\u003ch4\u003eWhat does this spark plug cross-reference to?\u003c\/h4\u003e\n\u003cp\u003eThis listing references OMC part number 386941 for applications where L77JC4 is specified.\u003c\/p\u003e\n\u003ch4\u003eIs this listing for one spark plug?\u003c\/h4\u003e\n\u003cp\u003eYes. This product is sold individually as one spark plug.\u003c\/p\u003e\n\u003ch4\u003eWhat engine style is this used with?\u003c\/h4\u003e\n\u003cp\u003eThis product is set up for Inboard\/IO use based on the OMC Stern Drive\/Cobra application.\u003c\/p\u003e\n\u003ch4\u003eShould I check the gap before installing it?\u003c\/h4\u003e\n\u003cp\u003eYes. Always check and set the spark plug gap according to the service manual or engine decal before installation.\u003c\/p\u003e\n\u003ch4\u003eHow should I confirm fitment?\u003c\/h4\u003e\n\u003cp\u003eConfirm fitment using Mercury part number 896329821, Champion plug code L77JC4, OMC reference 386941, your engine model, and your service documentation.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":48580286775528,"sku":"896329821","price":5.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/9927\/6776\/files\/896329821_1_a2d5d932-b2c7-4ae0-835d-08665e8409b3.webp?v=1780354223","url":"https:\/\/wakeboss.com\/products\/mercury-896329821-spark-plug","provider":"Wakeboss","version":"1.0","type":"link"}