Restore factory‑tight cable tension on your Stihl trimmer or Kombi‑Motor with this genuine OEM Tommy Screw (part #4140 790 7501). The oversized thumb‑wheel design lets you fine‑tune throttle and clutch cables without tools, keeping response crisp and preventing premature wear.

Key Features & Benefits

Authentic Stihl replacement – manufactured to the same specs as the original fastener for perfect fit and long service life.
Tool‑free adjustment – knurled knob makes field tweaks quick and secure.
High‑strength nylon & steel insert – resists vibration loosening on high‑rev engines.
Versatile compatibility – used on multiple FS brushcutters, KM Kombi‑Motors, and FR backpack trimmers.

Compatible Models*

FS 55 • FS 75 • FS 80 / 80R • FS 83 / 83T • FS 85 / 85R / 85T / 85RX • FR 85 / FR 85T • KM 55 / 55C / 55R / 55RC • KM 85 / 85R • KM 90 / 90R • KM 100 • KM 130 / 130R – and other Stihl machines calling for Tommy Screw 4140‑790‑7501.
*Always verify part number in your owner’s or service manual before ordering.

Package Includes
1 × Stihl Tommy Screw (thumb‑wheel adjuster) in factory‑sealed packaging.

Tip: Dab a drop of bar‑oil on the threads before installation to ensure smooth turning and corrosion protection.

Stihl Tommy Screw (Thumb‑Wheel Tensioner) – OEM #4140 790 7501 Fits FS‑ & KM‑Series Trimmers

Stihl Tommy Screw (Thumb‑Wheel Tensioner) – OEM #4140 790 7501 Fits FS‑ & KM‑Series Trimmers