How to fix a Ferris IS600z Lawn Mower that starts hard or runs poorly?
- EElizabeth JenningsAug 25, 2025
If your Ferris Lawn Mower engine starts hard or runs poorly, the fuel mixture might be too rich. Try cleaning the air filter. If you have a carbureted model, check the choke adjustment. For fuel-injected models, consult an authorized dealer. Another potential cause is faulty, fouled, or incorrectly gapped spark plugs. You may need to clean, gap, or replace them, referring to the engine manual for guidance.