Product Description
The 1140 030 0400 Crankshaft is a genuine STIHL replacement engine component engineered to deliver smooth, reliable power transmission from the piston to the clutch system. Precision-forged and balanced to factory specifications, this OEM crankshaft ensures optimal engine performance, reduced vibration, and long-lasting durability in demanding cutting conditions.

Key Features
✅ Part Number: 1140 030 0400
✅ Component Type: Crankshaft Assembly
✅ Material: Forged and precision-machined steel
✅ Function: Converts reciprocating piston motion into rotational energy
✅ Quality: Genuine STIHL OEM part for perfect fit and dependable operation

Benefits
✔️ Restores Engine Power – Ensures smooth, efficient energy transfer from piston to clutch.
✔️ Reduces Vibration – Factory-balanced design provides smoother operation and reduced wear.
✔️ Long-Term Durability – Built from hardened steel for strength and heat resistance.
✔️ OEM Precision Fit – Direct replacement with no modification required.
✔️ Improves Longevity – Protects bearings and internal components from misalignment stress.

Compatible With
Commonly suits STIHL MS 170, MS 171, MS 180, MS 181, and other models using the 1140-series engine assembly.
(Always verify compatibility using your chainsaw’s serial number or OEM service manual.)

Installation Tips
1️⃣ Ensure the engine is completely cool before beginning disassembly.
2️⃣ Split the crankcase carefully to remove the old crankshaft.
3️⃣ Inspect bearings, seals, and gaskets; replace if worn or damaged.
4️⃣ Install the new crankshaft with proper alignment and lubrication.
5️⃣ Reassemble the crankcase, torque fasteners to factory specs, and confirm free rotation.
6️⃣ Start and test for smooth operation and balanced engine performance.