Hit & Miss Engine, RETROL HM-01 7cc Single Cylinder 4-Stroke Water-Cooled Engine + Complete Starter Bundle with CDI Igniter, Fuel Tank, Base & Transport Cart for STEM Education & Science Demonstration

Specifications.Material: 304 Stainless Steel + High-Carbon Steel + Bamboo + Wood + Electronic Components.Brand: RETROL ENGINE.Model: HM-01 (Black Edition, Complete Bundle with Transport Cart).Form: KIT Version (Engine, Ignition, Fuel Tank, Base, Cart).Displacement: 7cc.Cylinder: Horizontal Single Cylinder.Stroke: 4-Stroke.Cylinder Diameter: 20mm.Stroke: 22mm.Cooling Method: Evaporative Water-cooling.Lubrication Method: Mixed Oil + Oil Cup Lubrication.Startup Method: Hand Pull Rope Start.Ignition Method: CDI Ignition System (Included).Spark Plug Type: 1/4-32 Thread ME8 Spark Plug (Included).Fuel: Gasoline 92# or Above.Lubricant: 4-Stroke Engine Oil (Mixed with Gasoline at a ratio of 1:25).Engine Weight: 1800g / Cart Weight: 700g / Total Product Weight: 2990g.Package Weight: 4000g.Product Dimensions: Engine 17 x 13 x 13cm; Cart varies.Package Dimensions: 30 x 30 x 30cm.Packing: Kraft Paper Box.Ages: 15+Package Including:.Base Equipment Box *1.Fuel Tank *1.Oil Pipe *1.CDI Igniter *1.Spark Plug *1.Engine *1.Hand Rope *1.Accessory Bag *1.Instruction Manual *1.Front and Rear Axle Wheel Set *1.Accessory Bag *1.Instruction Manual *1

• ⚙️ Black Edition Premium Metal Craftsmanship: The HM-01 engine features 304 stainless steel body, flywheels, and connecting rods, all CNC precision-machined with a high-carbon steel hardened crankshaft. The deep obsidian black electrophoresis coating offers a sleek, wear-resistant finish that exudes refined vintage industrial artistry on any desk or shelf
• 🔥 Authentic Hit-and-Miss Operation with Speed Control: Experience true 4-stroke mechanical motion via evaporative water cooling and mixed oil lubrication. The transparent adjustable oil cup, new-style carburetor, and resonance exhaust pipe deliver iconic rhythmic sounds. A dedicated high/low-speed gear lever lets you switch instantly between ultra-slow idle and high-speed power output
• 🧰 All-Inclusive Ready-to-Run Accessory Kit: This bundle eliminates separate purchases. You get the black HM-01 engine KIT, wooden base equipment box, fuel tank, oil pipe, CDI high-voltage pulse igniter, and 1/4-32 ME-8 spark plug. Just add 92# gasoline, 4-stroke oil mix, and a JST plug battery to fire up your complete working engine
• 🚚 Steerable Metal Transport Cart Included: The custom-designed flatbed cart features stainless steel spoked wheels, a front steel plate suspension, and a steering mechanism for manual pushing or towing. Four large metal-rim wheels ensure stability on grass and dirt, letting you easily move and display the engine at exhibitions, gatherings, or around your workspace
• 🎁 Perfect STEM Gift & DIY Experience: This KIT version comes with a detailed English manual, ideal for hobbyists, students, and collectors to build, learn internal combustion principles, and operate a real vintage engine. The complete set with cart makes an unforgettable gift, combining hands-on education, retro mechanical charm, and high collectible value