Stihl MM 55 Instruction Manual - Page 20

English Replacing the Air Filter If there is a noticeable loss of engine power 4 3 Engine Management Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. 469BA037 KN 469BA038 KN 2 1 N Set choke lever to g N Remove screw (1) N Remove filter cover (2) N Remove coarse dirt from inside the filter cover and around the filter N Remove the air filter (3) N Check the air filter - replace if necessary NOTICE Replace any damaged parts. N Insert air filter (3) in the filter housing (4) N Refit the filter cover and screw it down 18 MM 55, MM 55 C