Stihl MS 241 C-M Instruction Manual - Page 41

English 5902BA027 KN 2410BA016 KN Chain type Picco Rapid Picco Rapid Rapid Chain pitch 1/4" P 1/4" 3/8" P 3/8"; 0.325" 0.404" Minimum groove depth 0.16" (4.0 mm) 0.16" (4.0 mm) 0.20" (5.0 mm) 0.24" (6.0 mm) 0.28" (7.0 mm) If groove depth is less than specified: N Replace the guide bar. The drive link tangs will otherwise scrape along the bottom of the groove - the cutters and tie straps will not ride on the bar rails. Shroud Removing the shroud N Move the Master Control lever to the stop position (0). N Push the hand guard forward - the chain is locked. 1 2 1 1 N Open the twist locks (1) by turning them 1/4 turn counterclockwise with the combination wrench. N Remove the shroud (2). Installing the shroud N Place the shroud in position. N Close the twist locks by turning them a 1/4 turn clockwise. Cleaning the Air Filter If there is a noticeable loss of engine power N Remove the shroud - see "Shroud" Removing the air filter N Clean away loose dirt from around the filter NOTICE Do not use tools to remove and install the air filter - the air filter could be damaged in the process. 1. 2. N Turn air filter 1/4 turn counterclockwise and remove in the direction of the rear handle N Always replace a damaged filter Cleaning the air filter N Knock out the filter or blow it clear with compressed air from the inside outwards If knocking-out or blowing-out does not suffice, or in the case of stubborn dirt or stuck filter fabric, the filter must be subjected to a thorough cleaning. MS 241 C-M 39