The STIHL MS 171 Petrol Chainsaw is a high-quality STIHL saw powered by a robust petrol engine. The MS 171 features reduced-emission engine technology which helps to lower fuel consumption while maintaining maximum power. The STIHL MS 171 has been ergonomically designed for the user, and has an in-built anti-vibration system. This petrol chainsaw is ideal for cutting firewood, felling small trees or completing clean up tasks, making it a good choice of petrol chainsaw for domestic users. Features: Reduced-emission engine technology thanks to the 2-stroke engine with stratified charge. More power with a lower weight, resulting in up to 20% lower fuel consumption than regular 2-stroke engines and significantly reduced exhaust emissions. Advanced combustion technology allowing for optimum combustion and highly efficient performance, resulting in lower fuel consumption and high torque across a broad rpm range. Anti-vibration system to reduce the effects on the user’s blood vessels in the hands and arms. Compensator to deliver the correct quantity of fuel to the carburettor depending on the quantity of air passing through the air filter, keeping the fuel/air ratio in the combustion mixture constant. Single-lever master control for all of the important functions such as start, choke, throttle and stop. Side chain tensioner. Tool-free filler caps.