2017 Stihl MS 171

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MS 171 A lightweight, fuel-efficient chainsaw with reduced-emission engine technology.
The STIHL® MS 171 is part of a new generation of lightweight STIHL chain saws with reduced emission technology, a significant benefit for users because it saves fuel even as it cuts exhaust emissions. The MS 171 also has the STIHL pre-separation air filter, which can extend filter life up to five times over previous models.