{"product_id":"retrol-okmo-b04-miniature-4-stroke-hit-and-miss-gasoline-engine-model-rtr","title":"RETROL \u0026 OKMO B04 Miniature Air-Cooled Horizontal 4-Stroke Hit and Miss Gasoline Engine Model RTR","description":"\u003cp\u003e\u003cstrong\u003eRETROL \u0026amp; OKMO B04 Miniature Air-Cooled Horizontal 4-Stroke Hit and Miss Gasoline Engine Model RTR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"1337\" height=\"752\" src=\"https:\/\/www.youtube.com\/embed\/yw-yVsrQb0s\" title=\"A New Engine Is Coming… OKMO B04 Hit and Miss Engine\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClassic Amanco Farm Engine Heritage: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBased on American Amanco agricultural engines from the 1910s to 1930s, this 1\/4-scale Hit and Miss engine model captures the character of early air-cooled stationary engines. Its centrifugal flyweight governor controls intermittent firing and coasting, producing the characteristic \"pulse and idle\" pattern associated with historic farm machinery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReady-to-Run Design with Two Starting Methods:\u003c\/strong\u003e\u003cbr\u003e \u003cbr\u003eSupplied pre-assembled and factory-adjusted, this RTR engine model requires no sanding or assembly before setup. Start it by manually turning the flywheel or use the included drill-start shaft for assisted starting. The wooden base helps stabilize the unit during operation. Follow the manual for lubrication, fuel mixing, and ignition setup before starting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExposed CNC-Machined Mechanical Structure: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe aluminum-alloy body features an open crankshaft mechanism that makes the moving components visible for observation and maintenance. Mechanical touch ignition, a stainless-steel-spoke flywheel, and a brass cooling fan showcase the engineering details of traditional stationary engines. The open design offers a hands-on way to explore classic mechanical construction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunctional Display for Workshops and Collections: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMounted on a wooden base, this vintage-style engine can be displayed in a study, workshop, office, or mechanical collection cabinet. Start the engine to observe its intermittent firing cycle, or keep it as a static display piece. Designed for antique engine enthusiasts, miniature engine collectors, and fans of historical agricultural machinery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePractical Demonstration of Engine Principles: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe exposed mechanical linkages provide a clear view of centrifugal governing, valve movement, and touch ignition during operation. This working model helps demonstrate the operating principles of a four-stroke internal combustion engine and the Hit and Miss governing system, making it suitable for adult hobby projects, engineering demonstrations, and historical machinery study.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e.Model: B04\u003cbr\u003e.Ready Status: Ready to Run (RTR)\u003cbr\u003e.Material: Aluminum Alloy + Wood\u003cbr\u003e.Color: Green\/Red\u003cbr\u003e.Engine Type: Horizontal Single-Cylinder Four-Stroke Gasoline Internal Combustion Engine\u003cbr\u003e.Displacement: 3.6 cc\u003cbr\u003e.Bore: 16.0 mm\u003cbr\u003e.Stroke: 19.0 mm\u003cbr\u003e.Governing System: Hit and Miss\u003cbr\u003e.RPM Range: 500–3000 rpm\u003cbr\u003e.Power Output: Approximately 0.2 PS\u003cbr\u003e.Starting Methods: Manual Flywheel Starting \/ Drill-Assisted Starting\u003cbr\u003e.Cooling Method: Air-Cooled\u003cbr\u003e.Lubrication Method: Mixed-Fuel Lubrication\u003cbr\u003e.Gasoline-to-Oil Mixing Ratio: 25:1–30:1\u003cbr\u003e.Ignition System: Mechanical Touch-Triggered Ignition\u003cbr\u003e.Ignition Power Supply: 1 × 1.5V AA Battery (Battery Not Included)\u003cbr\u003e.Fuel: 92# \/ 95# or Higher-Grade Unleaded Gasoline (Fuel Not Included)\u003cbr\u003e.Engine Oil: Recommended 2T\/4T 10W50 Engine Oil (Lubricating Oil Not Included)\u003cbr\u003e.Product Weight: 1700g\u003cbr\u003e.Package Weight: 1800g\u003cbr\u003e.Product Dimensions: 22.5 x 11.5 x 13cm\u003cbr\u003e.Package Dimensions: 27 x 16 x 18cm\u003cbr\u003e.Packaging: Graphic Carton\u003cbr\u003e.Age: 16+\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePacking List:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e.Engine Unit *1\u003cbr\u003e.Electronic Control Box *1\u003cbr\u003e.Wood Base *1\u003cbr\u003e.Fuel Tank *1\u003cbr\u003e.Fuel Line *1\u003cbr\u003e.Drill-Starting Shaft *1\u003cbr\u003e.Spare Parts Kit *1\u003cbr\u003e.User Manual *1\u003c\/p\u003e","brand":"enginediy","offers":[{"title":"Engine Only(Green)","offer_id":67651178266838,"sku":"33ED3764516","price":519.99,"currency_code":"USD","in_stock":true},{"title":"Engine Only(Red)","offer_id":67651178299606,"sku":"33ED3764515","price":519.99,"currency_code":"USD","in_stock":true},{"title":"All Set(Engine+Cart) Green","offer_id":67651178332374,"sku":"33ED3764632","price":619.98,"currency_code":"USD","in_stock":true},{"title":"All Set(Engine+Cart) Red","offer_id":67651178365142,"sku":"33ED3764646","price":619.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0175\/0718\/8800\/files\/retrol-okmo-b04-miniature-4-stroke-hit-and-miss-gasoline-engine-model-rtr.jpg?v=1792491928","url":"https:\/\/www.enginediy.com\/fr-au\/products\/retrol-okmo-b04-miniature-4-stroke-hit-and-miss-gasoline-engine-model-rtr","provider":"EngineDIY","version":"1.0","type":"link"}