Once you find the PDF of the manual and the Stihl FS 70 R parts diagram:
The full parts manual is typically broken down into several "exploded view" sections to make individual components easier to identify: DIY Spare Parts Engine & Crankcase: Manual Stihl Fs 70 R Parts Diagram
The "R" in FS 70 R stands for "Rear handle" (loop handle), but the starter is still front-mounted. Once you find the PDF of the manual
When you open a parts manual for the FS 70 R, you won’t see one giant picture. The manual is divided into specific sections based on the major assemblies of the trimmer. Here is how the diagram is typically structured: Manual Stihl Fs 70 R Parts Diagram
The FS 70 R manual breaks the trimmer down into these primary assemblies: