What to do if my Oleo-Mac GSH 400 engine starts and runs, but the chain is not rotating?
- CCarrie ChambersJul 29, 2025
If your Oleo-Mac Chainsaw engine starts and runs, but the chain isn't rotating, here's what you can check: 1. Ensure the chain brake is released. 2. Verify the chain tension isn't too tight. 3. Inspect the guide bar and chain assembly. 4. Check for damage to the chain and/or guide bar. 5. Inspect the clutch drum and/or rim sprocket for damage. If necessary, contact a Servicing Dealer to replace them.