The Stihl FS 250 is a powerful and reliable brushcutter, designed to handle demanding clearing tasks. Whether you’re performing routine maintenance or need to fix a specific issue, having the correct part numbers is essential for getting the right components.

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Contents hide
1 Models Sharing Many Parts with the Stihl FS 250:
2 Common Stihl FS 250 Replacement Parts & Part Numbers:
2.1 I. Engine Components:
2.2 II. Clutch & Drive System:
2.3 III. Cutting Attachments & Guards:
2.4 IV. Handles & Controls:
2.5 V. Miscellaneous & Maintenance:
3 How to Ensure You Get the Right Part:

This guide provides a detailed list of common replacement parts for the Stihl FS 250. Many of these parts are also compatible with other similar models in the Stihl professional line.

Important Note: While many parts are interchangeable between similar models, it is crucial to always verify the correct part number for your specific machine using your owner’s manual or by consulting an authorized Stihl dealer. Manufacturing variations and model updates can affect part compatibility.

Models Sharing Many Parts with the Stihl FS 250:

Several other Stihl professional brushcutter and related models share a significant number of parts with the FS 250, particularly within the engine and drive system components. These commonly include:

  • Stihl FS 250 R: (The “R” typically denotes a loop handle, but internal parts are often the same as the bike handle version).
  • Stihl FS 120 / FS 120 R: (Often share many engine and powerhead components, though some specifics may differ).
  • Stihl FS 200 / FS 200 R: (Similar to the FS 120/R relationship, these share many core parts with the FS 250).
  • Stihl FS 300: (Often shares parts in the same series).
  • Stihl FS 350: (Often shares parts in the same series).
  • Stihl FR 350, FR 450, FR 480: (These are backpack brushcutters that often use the same core engine and powerhead components as the equivalent FS models).
  • Stihl BT 120 C, BT 121: (Earth augers that may share engine parts).
  • Stihl FT 250, HT 250, SP 200, TS 200: (Other power tools that may share some engine or common small parts).

Remember: Even within these models, not every single part is identical. Always double-check!

Common Stihl FS 250 Replacement Parts & Part Numbers:

Here is a breakdown of key components and their typical part numbers for the FS 250. Remember to verify for your specific machine.

I. Engine Components:

  • Cylinder Assembly:
    • Cylinder: 4134 020 1200
    • Piston (Standard): 4134 030 0400
    • Piston Ring (Standard): 4134 034 1500 (x2 needed per piston)
    • Wrist Pin: 4134 038 0500
    • Circlip (Piston Pin): 9463 620 1201 (x2 needed)
  • Crankshaft & Connecting Rod:
    • Crankshaft Assembly: 4134 030 0800
    • Connecting Rod Assembly: 4134 030 0600
    • Crankshaft Bearing (PTO Side): 9503 003 0228
    • Crankshaft Bearing (Flywheel Side): 9503 003 0228
    • Crankshaft Seal (PTO Side): 9640 003 1580
    • Crankshaft Seal (Flywheel Side): 9640 003 1580
  • Carburetor & Fuel System:
    • Carburetor (Common models include Zama C1Q-S66, C1Q-S161): Part number varies by specific carburetor model (e.g., 4134 120 0651, 4134 120 0652). Check your existing carburetor or manual.
    • Carburetor Repair Kit: Specific to your carburetor model (e.g., Zama RB-77). Consult carburetor manufacturer documentation.
    • Fuel Tank Assembly: 4134 350 0400
    • Fuel Cap: 0000 350 0526
    • Fuel Line: 0000 988 0800 (Sold by the meter, cut to length)
    • Fuel Filter: 0000 989 0816
    • Impulse Hose: 4134 129 0900
  • Air Filter & Intake:
    • Air Filter: 4134 141 0300
    • Air Filter Cover: 4134 141 0400
    • Carburetor Mounting Flange: 4134 123 7100
  • Exhaust System:
    • Muffler Assembly: 4134 140 0600
    • Muffler Gasket: 4134 149 0600
    • Spark Arrestor Screen: 0000 967 0805
  • Ignition System:
    • Ignition Module: 4134 400 1300
    • Spark Plug (NGK BPM7A): 0000 400 7000

II. Clutch & Drive System:

  • Clutch Assembly: 4134 160 2001 (Often includes drum, shoes, and springs)
  • Clutch Shoe (Individual): 4134 160 2900 (x2 needed)
  • Clutch Spring: 4134 162 0600 (x2 needed)
  • Clutch Drum: Part of the Clutch Assembly (4134 160 2001)
  • Drive Shaft Assembly: Part number depends on the specific model variation (straight shaft vs. flex shaft like the FR models). Consult your manual.
  • Flex Shaft (if applicable): Part number depends on the specific model. Consult your manual.
  • Gearbox Assembly (Drive Head): 4134 640 0100
  • Grease Fitting (Gearbox): 0000 953 8009

III. Cutting Attachments & Guards:

  • Cutting Head (Common models like Autocut C 26-2): 4002 710 2169 (Compatibility with other heads like PolyCut or brush blades requires specific adapter kits and guards).
  • Guard Assembly: 4134 710 8000 (Ensure you have the correct deflector for the attachment being used).
  • Deflector (Grass Cutting): 4134 713 1000
  • Deflector (Metal Blade): 4134 713 1100
  • Blade Adapter Kit (for metal blades): Includes components like thrust washer (4126 713 3100), rider plate (4126 713 3110), and collar nut (4126 642 7600).

IV. Handles & Controls:

  • Throttle Trigger Assembly: 4134 180 1500
  • Throttle Cable: 4134 182 1000 (Length may vary slightly between models; verify fitment).
  • Start/Stop Switch: 4134 430 1500
  • Handlebar Assembly (Bike Handle): Consult manual for specific part number.
  • Loop Handle Assembly: Consult manual for specific part number (used on FS 250 R).
  • Grip (Left/Right): Often shared across many FS models (e.g., 4119 790 3400).
  • Shoulder Harness: Various options available from Stihl. Check accessory catalog.

V. Miscellaneous & Maintenance:

  • Spark Plug Wrench: Typically included with the machine.
  • Allen Wrenches: Typically included with the machine.
  • Fuel Can: For proper fuel mixing and storage.
  • 2-Stroke Engine Oil: Stihl MotoMix or other high-quality JASO FD rated oil (Mix ratio is 50:1).
  • Gearbox Grease: Stihl Special Grease for gearheads.

How to Ensure You Get the Right Part:

  1. Check Your Stihl Owner’s Manual: This is the definitive source for your specific model’s parts.
  2. Locate Your Machine’s Model and Serial Number: This information is usually on a sticker on the main housing. It helps identify the exact version of your tool.
  3. Consult an Authorized Stihl Dealer: They have access to detailed parts diagrams and updated information and can help you confirm compatibility based on your serial number.
  4. Compare Your Old Part: If you have the part you are replacing, compare it physically to images online or at a dealer.

By using this list and verifying the numbers for your specific Stihl FS 250 (or compatible model), you can confidently order the correct replacement parts and keep your brushcutter performing at its best.