This is the 2nd generation engine model, upgraded compared to the previous version.

• 30% larger overall size than the first generation
• Displacement increased by 50%, from 2.2CC (V1 single cylinder) to 3.3CC (V2 single cylinder)
• Larger flywheel and new belt tensioner
• Retain adjustable ignition advance angle function
• Hardened steel gears for the whole series
• Upgraded simulated exhaust pipe The engine is tuned for low idle speed and delivers nice exhaust sound.

Specifications Bore: 15mm Stroke: 18mm Displacement: Single cylinder 3.3CC / Twin cylinder 3.3CC*2 Main Material: Magnesium-aluminum alloy, stainless steel Fuel: Gasoline / Kerosene; also compatible with methanol or butane gas after modification Lubricating oil mixing ratio: 25:1 ~ 30:1

Weight: Net Weight: V1 1130g, V2 1260g Gross Weight: V1 1410g, V2 1530g Package Size: 191919 CM

Tuning & Important Notes This is an open-type 4-stroke engine model. It helps players directly observe the running status and learn the working principle of 4-stroke engines. Before every startup, please add a drop of engine oil or semi-solid grease on all friction and moving joints, such as camshaft & tappet, connecting rod & crankshaft, valve spring and tappet joints.

Operation steps: After refueling and power on, insert the starting rod and rotate counterclockwise to start. Slightly open the carburetor choke for 1 second to feed fuel. Once ignited, fully open the choke and adjust to high speed. The main needle controls fuel input and high speed RPM. After setting high speed, slowly close the choke and adjust the idle needle to keep the engine running without stalling. You may also adjust ignition advance angle for more stable running performance. Players can search online for more engine operation knowledge.