{"product_id":"yamakato-ignition-coil-module-for-honda-gx340-gx390-engines-4-pin-connector-air-gap-gauge","title":"YAMAKATO Ignition Coil Module for Honda GX340 GX390 Engines — 4-Pin Connector \u0026 Air Gap Gauge","description":"\u003cp\u003e\u003cstrong\u003eYAMAKATO 30500-Z5T-003 is a replacement ignition coil module designed to restore spark to Honda GX340 and GX390 engines and compatible generators.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your small engine is failing to produce a steady spark or is misfiring, this YAMAKATO ignition coil assembly offers a direct-fit replacement for a range of Honda GX-series motors and popular generator models. Manufactured as an aftermarket 3A-quality part, the coil includes a 4-pin connector, an air gap gauge for correct installation, and a spare F6RTC spark plug in a protective bag to help get your engine running after installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and generator models will this coil work with?\u003c\/h3\u003e\n\u003cp\u003eThis coil is listed as compatible with Honda GX240, GX270, GX340 and GX390 engine families and with numerous generator model lines that use those engines. It also fits equipment from OEMs that use the same Honda powerplants, such as MTD, Cub Cadet and Troy-Bilt models referenced in parts lists.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for Honda part numbers 30500-Z5T-003 and 30500-Z5R-003.\u003c\/li\u003e\n  \u003cli\u003eCompatible with GX390T2, GX390R2, GX390U2, GX340RT2 and similar variants.\u003c\/li\u003e\n  \u003cli\u003eWorks with generator models EM4000SX, EM5000SXK3, EM6500SXK2, EG6500CL, EB5000XK3 and more.\u003c\/li\u003e\n  \u003cli\u003eAlso used as a replacement in some MTD\/Cub Cadet\/Troy-Bilt machines using these engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install the YAMAKATO ignition coil and set the air gap?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires basic hand tools and a safe workflow: disconnect the spark plug, loosen mounting bolts, remove the old coil, install the new coil, and reconnect the 4-pin connector. The included air gap gauge helps you set the correct distance between the coil and the flywheel for reliable ignition.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDisconnect battery and spark plug wire before starting.\u003c\/li\u003e\n  \u003cli\u003eMount coil using the original bolts and align with flywheel magnets.\u003c\/li\u003e\n  \u003cli\u003eUse included air gap gauge to set specified clearance for proper spark.\u003c\/li\u003e\n  \u003cli\u003eReconnect 4-pin harness and test ignition with supplied spark plug if needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance and quality should I expect from this aftermarket coil?\u003c\/h3\u003e\n\u003cp\u003eAs a 3A-quality aftermarket coil, the YAMAKATO unit is made to meet common performance needs for repair and maintenance rather than to claim OEM lifetime durability. It restores ignition function and is supplied with installation aids to simplify replacement; however, correct fitment and wiring must be verified before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket construction intended as a cost-effective replacement.\u003c\/li\u003e\n  \u003cli\u003eComes with a 4-pin connector matching compatible harnesses.\u003c\/li\u003e\n  \u003cli\u003eIncludes air gap gauge and one F6RTC spark plug for initial testing.\u003c\/li\u003e\n  \u003cli\u003eConfirm engine model and existing part number to avoid ordering mistakes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can I confirm this is the right part for my machine?\u003c\/h3\u003e\n\u003cp\u003eMatch the part number on your existing coil to 30500-Z5T-003 or 30500-Z5R-003, and verify engine model (GX340, GX390, etc.) or generator model in your owner’s manual or parts diagram. If the connector type and mounting pattern match your old coil, this YAMAKATO assembly should fit as a replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck your engine serial\/model stamp against GX-series listings.\u003c\/li\u003e\n  \u003cli\u003eCompare the 4-pin connector shape and wire colors to the original harness.\u003c\/li\u003e\n  \u003cli\u003eConfirm mounting hole spacing before final installation.\u003c\/li\u003e\n  \u003cli\u003eContact supplier with photos if you’re uncertain about compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The YAMAKATO 30500-Z5T-003 coil assembly is aimed at owners, repair shops and maintenance technicians who need a straightforward, affordable replacement ignition coil for Honda GX340\/GX390-powered generators, pressure washers, tillers and other equipment. It’s suitable when the original coil fails, when spark is intermittent, or when you’re performing preventive maintenance—but always confirm part number and connector type to ensure correct fitment.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this coil include the spark plug and installation tools?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes an air gap gauge and one F6RTC spark plug in a bubble bag for initial setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my Honda GX390 generator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If your generator uses part number 30500-Z5T-003 or 30500-Z5R-003 and a 4-pin connector, this YAMAKATO coil is compatible.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YAMAKATO","offers":[{"title":"Default Title","offer_id":67587454533817,"sku":"B0BZP111RT","price":104.68,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/yamakato-coil-front-view.jpg?v=1790508769","url":"https:\/\/redleafauto.ca\/products\/yamakato-ignition-coil-module-for-honda-gx340-gx390-engines-4-pin-connector-air-gap-gauge","provider":"Redleaf Auto","version":"1.0","type":"link"}