S-Start is ideal for those who like to have soft and smooth engine starting. It is suitable for professional users too who can save time and energy with less effort. With S-Start 30 - 50% less pulling force is required. Vibration and Sound Pressure Level (EU Model) Testing and average are made according to CE Regulations. Column 1 Model number. Column 2 Vibration Level (m/s2). Last Column Sound Pressure Level/db (A)