MS-170 Is The Ideal Lightweight Compact, With Just The Right Amount Of Power For Trimming Or Cutting Small Trees, Falling Limbs After a Strom And Other Tasks Around The Yard. The MS 170 Has Many Of The Same Features As The Professional. The Intelligent-Carb Compensating Carburettor Is Designed To Automatically Adjust The Air/Fuel Ratio When The Air Filter Become Restricted Or Partially Clogged And Maintains The Engines Correct rpm. The System Uses Air From The Clean Side Of The Air Filter To Control The Diaphragm And Flow Of Fuel. As The Air Filter Becomes Dirty And Less Air Is Available The Carburettor, The System Adjusts The Fuel Flow To Compensate for The Decrease In The Air Flow. This Is In Contras To Typical Carburettors That Utilize The Air From The Dirty Side Of The Air Box. The Ematic Guide Bar, When Used With The STIHL Oilmati Saw Chain, Will Provide Proper Lubrication And Less Oil Consumption Than Conventional Methods. The System Works Because Two Ramps, Strategically Place In The Guide Bar Rail, Help Contain The Flow Of Oil And Direct All Lubrication To The Sliding Faces Of The Bar And Chain Links As Well As The Rivets And Driver Holes, Which In Turn Can Reduce Bar Oil Consumption Up To 50%. Displacement 30.1 cc., Engine Power 1.7 bhp., Fuel Capacity 8.5 oz. And Chain Oil Capacity 4.9 oz. The Occurrence Called Kickback Can Cause Serious Or Fatal Injury. Always Read The Instruction Manual Carefully Before Using Your Saw. STIHL Uses A Green And Yellow Colour-Coding System To Help You Select A Powerhead, Bar And Chain Combination That Complies With The Kickback Requirements Of ANSI Standard B175.1.