Understanding the sequence of washers and spacers in the cutting head. Locating hidden screws in the housing or engine shroud. Visualizing the routing of fuel lines and throttle cables. Key Sections of the FS45 Diagram

When you download or view the schematic, it is usually broken down into several "sub-assemblies." Understanding these sections helps you find what you need faster: 1. The Engine and Crankcase

Find the part on the "exploded" picture and note the reference number (e.g., 5 or 12).

Since the FS45 is a curved-shaft model, it uses a flexible drive shaft. The diagram highlights the liner, the drive shaft itself, and the AutoCut head components. It also shows the safety guard and the line limiting blade. How to Use the Diagram for Repairs

Modern trimmers contain dozens of small components that must be assembled in a specific order. A diagram serves as your blueprint for: Identifying OEM part numbers for precise ordering.

Commonly referred to as the "rewind starter," this diagram shows the rope rotor, the pawls, and the recoil spring. If your pull cord doesn't retract, this schematic will show you how to tension the spring correctly. 4. The Drive Tube and Cutting Head

Even though it is a sealed unit, some users prefer to check the lubrication of the flexible drive shaft if they notice excessive vibration.

Most FS45 issues are fuel-related. This part of the diagram shows the carburetor (usually a Zama or Walbro model), the fuel tank, the pickup body (fuel filter), and the vent. If your trimmer starts but won’t stay running, these are the parts to inspect. 3. The Starter Assembly