H73 Tractor Engine Model 2.6cc Vertical Single Cylinder 4-Stroke OHV Gas Engine

  

Microcosm H73 Tractor Engine Model 2.6cc Vertical Single Cylinder 4-Stroke OHV Gas Engine. This is a water-cooled vertical single-cylinder engine built-in with a speed limiter and equipped with a radiator.

The main body is made of brass and stainless steel, paired with a wooden base for easy placement and operation. This desktop engine model emits powerful mechanical roars when running, intuitively demonstrating the fascinating charm of engine operation. It delivers uncompromising performance and boasts great value for both play and display. This vintage engine model with a historical vibe is an excellent addition to collections for model enthusiasts and collectors.

Suitable for ages 14 and up. Material: Brass + Stainless Steel + Wood.

Cylinder Bore: 13 mm (0.51 in). Stroke: 20 mm(0.79in). Starting Method: External Force(Electric Drill) or Manual Pulling. Ignition Supply Voltage: 4.5V (3 × AA batteries, batteries not included).

Product Dimensions: 150×120×185mm (5.91×4.72×7.28in). Package Includes: 1 × Engine Model + 1 × Spare O-ring + 1 × Instruction Manual. Check the engine circuit on the wooden base, connect the fuel tank hose, and install 3 AA batteries (rated voltage: 4.5V). Fill the tank with 95-octane gasoline. Rotate the flywheel on the right side of the engine (the side with the power switch).

Clockwise several times to let the mixed fuel enter the cylinder and ensure no air remains in the fuel hose. Turn on the power switch, then rapidly rotate the flywheel on the right side of the engine (the side with the power switch). Clockwise to start the engine.

If the ignition system and cylinder compression function normally but the engine still fails to start. You need to adjust the carburetor needle valve. Tighten the main needle valve of the carburetor fully, then loosen it by a quarter turn.

And rotate the flywheel to start the engine so that the air-fuel mixture ratio can return to normal. Turn off the power switch when the engine stops running. No lubricating oil needs to be added to the crankcase, as the product is pre-filled with solid lubricant at the factory. If necessary, you only need to apply one drop of lubricating oil to the moving parts such as connecting rods, bearings, etc.