View the instruction manual for all of your STIHL power equipment sold within the U.S.. ▻ Use the chainsaw as described in this instruction manual. 4.3 The Operator. WARNING. ￭ Users without adequate training or instruction cannot recognize or Manuals and User Guides for Stihl MS 661 C-M. We have 5 Stihl MS 661 C-M manuals available for free PDF download: Instruction Manual, Manual · 1 Introduction · 2 Browse and Download for FREE Stihl MS 661 C-M PDF Instruction Manual. Find the help you need with user manuals and free owners instruction guides. View and Download Stihl MS 661 instruction manual online. MS 661 chainsaw pdf manual download. Chainsaw Stihl MS 661 C-M Instruction Manual. (124 pages). The STIHL MS 661 C-M chainsaw is a fuel-efficient professional chainsaw featuring an Always read the instruction manual carefully before using your saw.MS 661 C-M. English. 2. This Instruction Manual refers to a. STIHL chain saw, also called a machine in this Instruction Manual. Pictograms.