{"product_id":"ransoto-ignition-coil-set-for-kawasaki-fh381v-fh770d-engines-2-pack-replacement-21171-7034-high-conductivity-windings","title":"RANSOTO Ignition Coil Set for Kawasaki FH381V–FH770D Engines, 2-Pack Replacement 21171-7034, High-Conductivity Windings","description":"\u003cp\u003e\u003cstrong\u003eRANSOTO ignition coil 21171-7034 is a two-piece replacement coil built to restore spark delivery for compatible Kawasaki small engines and equivalent John Deere models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your mower, generator, or utility engine is coughing, misfiring, hard to start, or losing power, a worn ignition coil is a common culprit. This RANSOTO set replaces OE part numbers such as 21171-7001 and 21171-7013 and fits a wide range of Kawasaki overhead-v models (FH381V through FH770D) plus John Deere AM121820 and AM133525. The coils are manufactured with high-conductivity windings and insulated housings designed to resist shorting and deliver reliable spark under normal operating conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines will these coils work with?\u003c\/h3\u003e\n\u003cp\u003eThese coils are made to match electrical and mounting dimensions for many Kawasaki V-twin and single-cylinder overhead engines used in lawn and garden equipment. They also fit specific John Deere part numbers where cross-referenced. Verify your engine’s part number against the listed compatible engines and replacement numbers before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Kawasaki FH381V, FH430V, FH480V, FH500V, FH541V, FH580V, FH601D, FH641D, FH680D, FH721D, FH770D\u003c\/li\u003e\n  \u003cli\u003eCross-references John Deere AM121820 and AM133525\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM numbers like 21171-7034, 21171-7001, 21171-7013 and others listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will these coils improve engine performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing a failing coil restores a strong, consistent spark so combustion becomes reliable again. That typically translates to easier starting, steadier idling, smoother acceleration, and regained power. The improved electrical conductivity of the windings helps reduce misfires compared with degraded coils.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStronger spark reduces starting issues and misfires\u003c\/li\u003e\n  \u003cli\u003eSmoother idle and reduced stalling during load changes\u003c\/li\u003e\n  \u003cli\u003eConsistent power and acceleration recovery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the construction and durability features?\u003c\/h3\u003e\n\u003cp\u003eRANSOTO coils use pure copper or copper-clad aluminum windings for efficient current transfer and a silicon-steel laminated core to optimize magnetic flux. The windings are sealed with epoxy resin or insulating paint to prevent short circuits and protect against vibration and heat common in outdoor equipment. These materials are chosen for long service life under typical lawn and light industrial use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCopper or copper-clad aluminum windings for conductivity\u003c\/li\u003e\n  \u003cli\u003eEpoxy or insulating coating to prevent winding shorts\u003c\/li\u003e\n  \u003cli\u003eSilicon-steel core to improve magnetic permeability and reduce losses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I replace an ignition coil and how do I check it?\u003c\/h3\u003e\n\u003cp\u003eReplace the coil if the engine is hard to start, stalls, runs unevenly, or loses power — signs the coil may be failing or has reached end of life. Visual inspection can reveal cracks, burns, or damaged terminals; multimeter tests or a professional ignition-spark check confirm electrical performance. Because this listing includes two coils, you can replace both sides where applicable to maintain balanced ignition system performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace when experiencing starting trouble, misfiring, or power loss\u003c\/li\u003e\n  \u003cli\u003eInspect for physical damage: cracks, corrosion, or burnt insulation\u003c\/li\u003e\n  \u003cli\u003eUse continuity and resistance checks or an ignition tester for diagnosis\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This two-piece RANSOTO ignition coil set is targeted at homeowners, landscapers, and small equipment technicians who maintain Kawasaki-powered mowers, generators, or utility machines and need a reliable OE-replacement coil. It’s also suitable for anyone cross-referencing John Deere part numbers looking for a cost-effective, ready-to-install replacement. If you expect long-term heavy-duty use, consider professional diagnosis to confirm full system compatibility before installation.\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 set fit my FH500V engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the RANSOTO 21171-7034 coils list FH500V among compatible Kawasaki engines; verify your engine part number first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are both coils included and covered by warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, this listing contains two coils and RANSOTO offers after-sales warranty support for qualifying quality issues.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RANSOTO","offers":[{"title":"Default Title","offer_id":48085710962846,"sku":"B097XXSD4N","price":43.85,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ransoto-front-angle-ignition-coil.jpg?v=1785876951","url":"https:\/\/northtrailauto.ca\/products\/ransoto-ignition-coil-set-for-kawasaki-fh381v-fh770d-engines-2-pack-replacement-21171-7034-high-conductivity-windings","provider":"North Trail Auto","version":"1.0","type":"link"}