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Butom
HS45 / FS55 Carburetor for STIHL Trimmers

Trimmers · Carburetors

Butom HS45 / FS55 Carburetor for STIHL Trimmers

4.6 out of 5 · 571 reviews

Carb kit for FS38–FS55 trimmers, HS45 hedge trimmers and KM55 kombi.

$14.99at last check, Sep 27, 2026

Fits

  • FS38
  • FS45
  • FS46
  • FS55
  • FS55R
  • HS45
  • HL45
  • KM55

Replaces

  • C1Q-S66
  • C1Q-S71
  • C1Q-S97
  • C1Q-S143
  • 4140 120 0612
  • 4137 120 0606

About this part

STIHL's FS38 to FS55 trimmers are some of the most common two-strokes in American garages, and their Zama carburetor is a frequent fix. This kit covers the trimmers, the HS45 and HL45 hedge trimmers and the KM55 kombi motor.

It replaces a long list of C1Q-S carb stamps and comes factory-tuned, so most trimmers start and idle without touching the adjusting screws.

  • Fits FS38, FS45, FS46, FS55 and FS55R
  • Also HS45 and HL45 hedge trimmers
  • Fits KM55 kombi motor
  • Replaces C1Q-S66, S71, S97 and more
In the box
  • Carburetor
  • Air filter
  • Service parts
Specs
FilterReplaces 4137 124 2800
SetupFactory-tuned
Before you order

Compare the stamp on your old part with the “Replaces” list, and your engine code with “Fits”. If it still isn't clear, send a photo to the counter and we'll check it for you.

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