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Details the intended use of the VM 120 B2-4T engine in model airplanes.
Explains the VM 120 B2-4T's four-stroke, flat twin OHV design and ignition.
Provides guidance on recommended fuel types, octane rating, and oil mixture ratios.
Instructions for correctly mounting the intake RAM tube for proper engine operation.
Details the procedure for screwing the prop shaft into the hub using thread locking adhesive.
Guidance on mounting the engine to the firewall and considerations for standoffs.
Recommendations for fuel tank size, filter type, and fuel tubing connections.
Instructions on mounting the ignition Hall sensor and connecting the battery.
Information on exhaust header length effects and assembly with steel flanges.
Discusses different silencer options and their impact on power and noise levels.
Explains the function of crankcase venting and how to manage oil discharge.
Details on the Walbro carburetor, needle settings, and throttle linkage.
Recommended propeller sizes and considerations for optimal RPM range.
Instructions on properly tightening propeller screws to prevent loosening and ensure safety.
Essential safety precautions regarding propeller operation and inspection.
Step-by-step guide for starting the engine, including first start and subsequent starts.
Explanation of the ignition's automatic shut-off feature and battery management.
Procedure for the initial engine breaking-in period, including mixture and RPM limits.
General maintenance guidelines, including valve gap checks and lubrication.
Instructions on how to safely change spark plugs on a cold engine.
Detailed steps for measuring and adjusting the valve gap using feeler gauges.
Recommendations for lubricating rocker arm bearings and valve shafts.
Contact information for engine repair and technical assistance.
List of all components included with the engine package.
Discusses principles of effective engine cooling through cowling design and airflow.
Shows an example installation of a similar engine model in a specific aircraft.
Guidance on fuel tank placement, fuel line routing, and filter selection.
Details on making fuel tank air vents and connecting fuel lines securely.
Recommendations for suitable fuel tubing materials and installation practices.
Instructions for properly installing the ignition system components and wiring.
Details on creating and adjusting the linkage for the throttle and choke arms.
General| Cylinders | 2 |
|---|---|
| Fuel Type | Petrol |
| Fuel system | Carburetor |
| Ignition | Electronic |
| Cooling | Air-cooled |
| Displacement | 120 cm³ |
| Type | 4-stroke, air-cooled, twin-cylinder boxer |
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