The TJ604E uses a 13.5 amp motor feeding six angled steel tines, with a 16 inch path and 8 inch depth. At 120 volts that is about 1,600 watts, which is close to the maximum a normal 15 amp household circuit can supply for a single tool.
The tradeoff is that you are limited by the cord and by the circuit. On a long, thin extension cord the motor sees a lower voltage and runs hotter, so a 12 or 14 gauge outdoor cord of 50 feet or less is the sensible standard. Against the Earthwise 9A model it has 4.5 more amps, which makes a real difference in dry loam, and against the 18 inch machines it gives up two inches of width but folds smaller.
In year three, the common wear points are the cord strain relief, the switch and the tine edges. Keep the cord coiled loosely, wipe the tines, and check for hot spots on the cord after a long session. Sun Joe has long parts availability, which makes this the lowest-risk long-term purchase here. If you plan to keep one corded tiller for ten years, this is the one with the best chance of replacement tines and switches being in stock when you need them.
What works
- 13.5A suits worked garden soil
- Six tines give a fine tilth
- Folding handle for storage
- Strong brand parts support
Watch out for
- Front tines ride up in packed soil
- Needs a heavy-gauge cord
Spec sheet
- Power
- 13.5A corded
- Width
- Up to 16 inches
- Depth
- Up to 8 inches
- Tines
- 6 steel, angled
- Handle
- Folding





