Proline® cylinder piston kit for Stihl 029, 039, MS290 chainsaws. Please compare your existing part with ours to verify proper fitment; actual product pictures are shown.
⚠️ IMPORTANT INSTALLATION NOTES:
1. Cylinder Mounting Screws: This cylinder has machine-threaded mounting holes. Two installation options are available:
- Use the included machine screws: Threadlocker is highly recommended when installing the included screws.
- Use self-tapping screws: You may reuse your original OEM self-tapping screws if they are in good condition or use new self-tapping screws. These screws will cut through/override the existing machine threads during installation.
2. 2019 Models – Muffler Fitment: The muffler bolt slots MUST be filed larger to achieve proper fitment.
Includes:
- Cylinder
- Piston
- Piston rings
- Circlips
- Wrist pin
- Screw (4pcs)
⚠️ PRODUCT APPEARANCE:
Cylinder color may vary from the pictures shown. Color variation does not affect fitment or performance.
Specs:
- 46mm
- Nikasil plated
-
Requires silicone sealant for assembly. We recommend Dirko HT
Replaces Stihl OEM #:
- 1127 020 1210, 11270201210