Why does my Simplicity 5101604 Lawn Mower engine start hard or run poorly?
- YysawyerAug 22, 2025
If your Simplicity Lawn Mower engine starts hard or runs poorly, the fuel mixture may be too rich. To resolve this, clean the air filter and check the choke adjustment. Also, the spark plug(s) might be faulty, fouled, or incorrectly gapped.