John Deere 2620 Quick Reference Guide

The recommended maintenance schedule includes checking the oil level and air filter before each use, inspecting the tines and drive belt monthly, and performing a comprehensive check-up including lubrication every 50 hours of operation.
Begin by checking the fuel level and quality. Ensure the spark plug is clean and properly gapped. Verify that the air filter is clean and the fuel valve is open. If the tiller still doesn't start, inspect the ignition system and carburetor.
Use SAE 10W-30 or SAE 30 motor oil for the engine, depending on the ambient temperature. Ensure to check the owner's manual for specific recommendations based on your operating conditions.
To adjust the tines, first ensure the engine is off and the tiller is on a stable surface. Loosen the tine retaining bolts, reposition the tines as needed, and then tighten the bolts securely.
Excessive vibration may be caused by damaged or unbalanced tines. Inspect the tines for wear or damage and replace if necessary. Also, check the mounting hardware for tightness and the drive belt for wear.
The air filter should be inspected before each use and replaced if dirty or damaged. Under normal conditions, replace the air filter every season or every 50 hours of operation.
Clean the tiller thoroughly, drain the fuel system, change the oil, lubricate moving parts, and store in a dry place. Cover the tiller to prevent dust accumulation.
Disconnect the spark plug, remove the belt guard, and loosen the belt tensioner. Slide the old belt off, position the new belt on the pulleys, adjust the tensioner, and replace the belt guard.
Ensure that the depth stake is adjusted correctly for the desired tilling depth. Check for any obstacles in the soil and inspect the tines for wear or damage that could affect performance.
Maintain the engine by keeping the air filter and spark plug clean, using fresh, high-quality fuel, and following the recommended maintenance schedule. Properly adjusted tines and correct tilling speed can also improve efficiency.