WACKER NEUSON BS50-2 Two cycle Vib Easy start-up: Reliable starting in idle with automatic choke thanks to the vented carburetor. Strong performance: High percussion rate, powerful stroke, high stroke energy, fast advance travel A unique four-stage air filtration system provides a virtually dust-free engine for longer life and improved durability. The system includes a last chance filter that protects the engine during air filter maintenance. Compact design offers easy operation, especially in trenches