{"product_id":"generac-10000039091-muffler-assembly-genuine-oem-replacement-generator-exhaust-muffler","title":"Generac 10000039091 Muffler Assembly – Genuine OEM Replacement Generator Exhaust Muffler","description":"\u003cp data-start=\"0\" data-end=\"210\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 10000039091\u003cbr data-start=\"28\" data-end=\"31\"\u003e\u003cstrong data-start=\"31\" data-end=\"44\"\u003eCategory:\u003c\/strong\u003e Generator Parts → Exhaust System Components → Muffler Assemblies\u003cbr data-start=\"109\" data-end=\"112\"\u003e\u003cstrong data-start=\"112\" data-end=\"121\"\u003eType:\u003c\/strong\u003e Generac 10000039091 Muffler Assembly – Genuine OEM Replacement Generator Exhaust Muffler\u003c\/p\u003e\n\u003chr data-start=\"212\" data-end=\"215\"\u003e\n\u003cp data-start=\"309\" data-end=\"921\"\u003eThe \u003cstrong data-start=\"313\" data-end=\"353\"\u003eGenerac 10000039091 Muffler Assembly\u003c\/strong\u003e is a genuine OEM replacement exhaust muffler designed for compatible \u003cstrong data-start=\"423\" data-end=\"482\"\u003eGenerac portable generators and outdoor power equipment\u003c\/strong\u003e. Engineered to original equipment specifications, this muffler reduces engine exhaust noise while safely directing exhaust gases away from the engine. Replacing a damaged or deteriorated muffler helps maintain proper engine performance, reduces excessive noise, and restores the factory exhaust system. The \u003cstrong data-start=\"790\" data-end=\"805\"\u003e10000039091\u003c\/strong\u003e part number also replaces the legacy Generac part number \u003cstrong data-start=\"863\" data-end=\"882\"\u003e000010000039091\u003c\/strong\u003e.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1118\" data-end=\"1121\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1123\" data-end=\"1149\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1151\" data-end=\"1517\"\u003e\n\u003cli data-section-id=\"4htvdh\" data-start=\"1151\" data-end=\"1181\"\u003e\n\u003cstrong data-start=\"1153\" data-end=\"1169\"\u003ePart Number:\u003c\/strong\u003e 10000039091\u003c\/li\u003e\n\u003cli data-section-id=\"1n1ya84\" data-start=\"1182\" data-end=\"1220\"\u003eGenuine OEM Generac replacement part\u003c\/li\u003e\n\u003cli data-section-id=\"1t4asm2\" data-start=\"1221\" data-end=\"1256\"\u003eComplete exhaust muffler assembly\u003c\/li\u003e\n\u003cli data-section-id=\"5s6i0s\" data-start=\"1257\" data-end=\"1292\"\u003eHelps reduce engine exhaust noise\u003c\/li\u003e\n\u003cli data-section-id=\"tvxwbc\" data-start=\"1293\" data-end=\"1344\"\u003eDirects exhaust gases safely away from the engine\u003c\/li\u003e\n\u003cli data-section-id=\"1sck9fq\" data-start=\"1345\" data-end=\"1398\"\u003eHeavy-duty steel construction for long service life\u003c\/li\u003e\n\u003cli data-section-id=\"p6iksq\" data-start=\"1399\" data-end=\"1427\"\u003eDirect-fit OEM replacement\u003c\/li\u003e\n\u003cli data-section-id=\"1r7zv24\" data-start=\"1428\" data-end=\"1517\"\u003eReplaces previous part number \u003cstrong data-start=\"1460\" data-end=\"1479\"\u003e000010000039091\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1519\" data-end=\"1522\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1524\" data-end=\"1551\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1553\" data-end=\"1581\"\u003e\u003cstrong data-start=\"1553\" data-end=\"1569\"\u003ePart Number:\u003c\/strong\u003e 10000039091\u003c\/p\u003e\n\u003cp data-start=\"1583\" data-end=\"1612\"\u003e\u003cstrong data-start=\"1583\" data-end=\"1596\"\u003eReplaces:\u003c\/strong\u003e 000010000039091\u003c\/p\u003e\n\u003cp data-start=\"1614\" data-end=\"1639\"\u003e\u003cstrong data-start=\"1614\" data-end=\"1631\"\u003eManufacturer:\u003c\/strong\u003e Generac\u003c\/p\u003e\n\u003cp data-start=\"1641\" data-end=\"1675\"\u003e\u003cstrong data-start=\"1641\" data-end=\"1658\"\u003eProduct Type:\u003c\/strong\u003e Muffler Assembly\u003c\/p\u003e\n\u003cp data-start=\"1677\" data-end=\"1696\"\u003e\u003cstrong data-start=\"1677\" data-end=\"1690\"\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/p\u003e\n\u003cp data-start=\"1698\" data-end=\"1748\"\u003e\u003cstrong data-start=\"1698\" data-end=\"1714\"\u003eApplication:\u003c\/strong\u003e Portable Generator Exhaust System\u003c\/p\u003e\n\u003cp data-start=\"1750\" data-end=\"1767\"\u003e\u003cstrong data-start=\"1750\" data-end=\"1763\"\u003eOEM Part:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003cp data-start=\"1769\" data-end=\"1838\"\u003e\u003cstrong data-start=\"1769\" data-end=\"1782\"\u003eQuantity:\u003c\/strong\u003e Sold Individually \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1840\" data-end=\"1843\"\u003e\n\u003ch2 data-section-id=\"17z2fqi\" data-start=\"1845\" data-end=\"1871\"\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp data-start=\"1873\" data-end=\"2067\"\u003eThe \u003cstrong data-start=\"1877\" data-end=\"1917\"\u003eGenerac 10000039091 Muffler Assembly\u003c\/strong\u003e is designed for compatible \u003cstrong data-start=\"1945\" data-end=\"2004\"\u003eGenerac portable generators and outdoor power equipment\u003c\/strong\u003e that specify \u003cstrong data-start=\"2018\" data-end=\"2066\"\u003epart number 10000039091 (or 000010000039091)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2069\" data-end=\"2298\"\u003eBecause this muffler is used across multiple Generac products, \u003cstrong data-start=\"2132\" data-end=\"2234\"\u003ealways verify your equipment model number, serial number, and original part number before ordering\u003c\/strong\u003e to ensure proper fitment. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"2300\" data-end=\"2303\"\u003e\n\u003ch2 data-section-id=\"119sf0q\" data-start=\"2305\" data-end=\"2340\"\u003eFunction of the Muffler Assembly\u003c\/h2\u003e\n\u003cp data-start=\"2342\" data-end=\"2394\"\u003eThe \u003cstrong data-start=\"2346\" data-end=\"2378\"\u003e10000039091 Muffler Assembly\u003c\/strong\u003e is designed to:\u003c\/p\u003e\n\u003cul data-start=\"2396\" data-end=\"2714\"\u003e\n\u003cli data-section-id=\"18mox3y\" data-start=\"2396\" data-end=\"2425\"\u003eReduce engine exhaust noise\u003c\/li\u003e\n\u003cli data-section-id=\"19zm3qw\" data-start=\"2426\" data-end=\"2480\"\u003eDirect hot exhaust gases safely away from the engine\u003c\/li\u003e\n\u003cli data-section-id=\"i7hshl\" data-start=\"2481\" data-end=\"2510\"\u003eSupport proper exhaust flow\u003c\/li\u003e\n\u003cli data-section-id=\"18so8xl\" data-start=\"2511\" data-end=\"2544\"\u003eHelp maintain engine efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"wmhlln\" data-start=\"2545\" data-end=\"2607\"\u003eProtect nearby engine components from excessive exhaust heat\u003c\/li\u003e\n\u003cli data-section-id=\"t3xer3\" data-start=\"2608\" data-end=\"2714\"\u003eRestore the factory exhaust system of compatible Generac equipment \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2716\" data-end=\"2719\"\u003e\n\u003ch2 data-section-id=\"1cnbljb\" data-start=\"2721\" data-end=\"2758\"\u003eCommon Signs Replacement Is Needed\u003c\/h2\u003e\n\u003cp data-start=\"2760\" data-end=\"2803\"\u003eReplace the muffler assembly if you notice:\u003c\/p\u003e\n\u003cul data-start=\"2805\" data-end=\"3003\"\u003e\n\u003cli data-section-id=\"w5cx2t\" data-start=\"2805\" data-end=\"2840\"\u003eExcessively loud engine operation\u003c\/li\u003e\n\u003cli data-section-id=\"qzyohc\" data-start=\"2841\" data-end=\"2866\"\u003eRust holes or corrosion\u003c\/li\u003e\n\u003cli data-section-id=\"1thkr1d\" data-start=\"2867\" data-end=\"2903\"\u003eCracked or damaged muffler housing\u003c\/li\u003e\n\u003cli data-section-id=\"rael18\" data-start=\"2904\" data-end=\"2936\"\u003eExhaust leaks near the muffler\u003c\/li\u003e\n\u003cli data-section-id=\"1d5ufef\" data-start=\"2937\" data-end=\"2978\"\u003eLoose internal baffles causing rattling\u003c\/li\u003e\n\u003cli data-section-id=\"1h97os4\" data-start=\"2979\" data-end=\"3003\"\u003ePhysical impact damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3005\" data-end=\"3172\"\u003eA damaged muffler can increase engine noise, allow exhaust leaks, and reduce the effectiveness of the generator's exhaust system. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3174\" data-end=\"3177\"\u003e\n\u003ch2 data-section-id=\"10va281\" data-start=\"3179\" data-end=\"3210\"\u003eInstallation \u0026amp; Service Notes\u003c\/h2\u003e\n\u003cp data-start=\"3212\" data-end=\"3322\"\u003eAllow the generator to cool completely and disconnect the spark plug wire before servicing the exhaust system.\u003c\/p\u003e\n\u003cp data-start=\"3324\" data-end=\"3895\"\u003eRemove the mounting hardware securing the existing \u003cstrong data-start=\"3375\" data-end=\"3407\"\u003e10000039091 Muffler Assembly\u003c\/strong\u003e and inspect the exhaust gasket, mounting studs, and fasteners for wear or damage. Install the replacement muffler using the original hardware or new OEM hardware if necessary, ensuring the exhaust flange seats evenly against the engine. Tighten all fasteners according to the manufacturer's specifications and inspect for exhaust leaks after starting the generator. Replace the exhaust gasket if it shows signs of wear or damage during installation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3897\" data-end=\"4169\"\u003e\u003cstrong data-start=\"3897\" data-end=\"3911\"\u003eImportant:\u003c\/strong\u003e Always verify your generator model and original part number before ordering. Never operate the generator with a cracked or leaking muffler, as escaping exhaust gases can present safety hazards and increase engine noise. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4171\" data-end=\"4174\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4176\" data-end=\"4206\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"4208\" data-end=\"4674\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1jecmjw\" data-start=\"4208\" data-end=\"4276\"\u003eInspect the muffler regularly for rust, cracks, or loose hardware.\u003c\/li\u003e\n\u003cli data-section-id=\"3jwjua\" data-start=\"4277\" data-end=\"4338\"\u003eCheck mounting bolts periodically and tighten if necessary.\u003c\/li\u003e\n\u003cli data-section-id=\"1kkf555\" data-start=\"4339\" data-end=\"4400\"\u003eReplace damaged exhaust gaskets when servicing the muffler.\u003c\/li\u003e\n\u003cli data-section-id=\"1xgbs6z\" data-start=\"4401\" data-end=\"4458\"\u003eKeep the exhaust outlet free of debris or obstructions.\u003c\/li\u003e\n\u003cli data-section-id=\"sbadno\" data-start=\"4459\" data-end=\"4517\"\u003eAllow the muffler to cool before performing maintenance.\u003c\/li\u003e\n\u003cli data-section-id=\"g5kzt0\" data-start=\"4518\" data-end=\"4674\" data-is-last-node=\"\"\u003eUse genuine OEM replacement parts to maintain factory fit, proper exhaust flow, and long-term generator performance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Generac","offers":[{"title":"Default Title","offer_id":53586723996011,"sku":"10000039091","price":74.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/generaclogo.webp?v=1784654181","url":"https:\/\/generalsprayers.com\/products\/generac-10000039091-muffler-assembly-genuine-oem-replacement-generator-exhaust-muffler","provider":"GeneralSprayers","version":"1.0","type":"link"}