{"product_id":"ruma-muffler-kit-for-honda-gx340-gx390-gx420-complete-replacement","title":"Ruma Muffler Kit for Honda GX340 GX390 GX420 - Complete Replacement","description":"\u003cp\u003eIn this review the Ruma Muffler Kit is evaluated as a direct replacement for Honda GX340, GX390 and GX420 small engines. The kit is aimed at owners of pressure washers, water pumps, snowblowers, log splitters and other equipment that use 11hp to 16hp Honda OHV style engines and clone equivalents. The single biggest reason to buy is convenience: the kit arrives with the muffler assembly, exhaust pipe\/manifold, gaskets, mounting hardware and even a spark plug so a full muffler rebuild or repair can be completed without hunting parts.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete muffler assembly:\u003c\/strong\u003e Replaces GX390 and GX340 exhaust mufflers so you can restore proper exhaust routing and noise control with one part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded exhaust pipe and manifold:\u003c\/strong\u003e The exhaust pipe and manifold are provided to match common small engine layouts and reduce fitment headaches during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGaskets and mounting hardware:\u003c\/strong\u003e Two gaskets, two mounting studs and five nuts are included so the kit is ready for installation without extra trips to the hardware store.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits many engines and equipment:\u003c\/strong\u003e Compatible with Honda GX340, GX390, GX420 and many clone engines used in pressure washers, pumps, snowblowers and log splitters for broad applicability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpare spark plug included:\u003c\/strong\u003e A spare spark plug in the package supports basic maintenance while replacing the muffler assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is for DIYers and small engine technicians who need a straightforward replacement for worn or damaged muffler assemblies on Honda GX340, GX390 and GX420 engines or compatible clones. It especially suits owners of pressure washers, water pumps and various outdoor power equipment who want a complete set of parts for a single repair session.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere are owners of factory generator models or engines with unique muffler geometries not listed in the compatibility notes, or users who require OEM-branded parts for warranty or original-equipment certification.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits a wide range of 11hp to 16hp Honda and clone engines, making it versatile for many tools and machines.\u003c\/li\u003e\n\u003cli\u003eComes as a full rebuild kit with gaskets, studs, nuts and an exhaust pipe so installation is efficient.\u003c\/li\u003e\n\u003cli\u003eCustomers report solid build quality and easy installation, reducing downtime for repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBolt strength has mixed feedback, so some users may prefer to replace mounting hardware depending on use conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eMuffler replacement kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible engines\u003c\/td\u003e\n\u003ctd\u003eHonda GX340, GX390, GX420 and compatible clone engines (11hp-16hp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eMuffler assembly, exhaust pipe\/manifold, 2 gaskets, 2 mounting studs, 5 nuts, 1 spark plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces\u003c\/td\u003e\n\u003ctd\u003eOEM muffler assemblies and covers including part numbers similar to 18310-ZE2-W61 and 18320-Z5T-010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended equipment\u003c\/td\u003e\n\u003ctd\u003ePressure washers, water pumps, snowblowers, log splitters, chipper shredders, air compressors (not generators)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRuma\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Ruma Muffler Kit is a practical, cost-effective solution for owners of Honda GX340\/GX390\/GX420 and compatible clone engines who need a quick, complete replacement. It delivers good fit and function for pressure washers, pumps and other outdoor equipment, and the included gaskets and hardware make installation straightforward. For those needing OEM-labeled parts or heavy-duty mounting hardware, a supplemental parts check is recommended, but for most repair jobs this kit offers strong value.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my GX390 pressure washer?\u003c\/strong\u003e\u003cbr\u003eIt is designed to fit GX390 engines and is commonly used on many pressure washer models that use that engine family.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre replacement gaskets and nuts included?\u003c\/strong\u003e\u003cbr\u003eYes, the kit includes two gaskets, two mounting studs and five nuts so it is ready for installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this work with Harbor Freight Predator 420cc engines?\u003c\/strong\u003e\u003cbr\u003eYes, the kit lists compatibility with many 420cc clone engines including common Predator 420cc models.\u003c\/p\u003e","brand":"Ruma","offers":[{"title":"Default Title","offer_id":48672138952923,"sku":"B097B9J9S2","price":33.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61qG-JphodL._AC_SL1500.jpg?v=1778638725","url":"https:\/\/gearmusthave.com\/products\/ruma-muffler-kit-for-honda-gx340-gx390-gx420-complete-replacement","provider":"GearMustHave","version":"1.0","type":"link"}