

DJI Agras T55 starter motor.
12V. 1.35 kW. Ten teeth, counter-clockwise. That last word is where the wrong part gets sold, because the clockwise unit bolts to the same flange, looks the same on a bench, and then will not catch the ring gear, and the battery gets blamed for a week.
Body is a steel barrel on a cast aluminium nose. Two bolt holes at 8 mm, pilot spigot between them to centre the motor, solenoid across the top with the main stud under a rubber boot. Around 2 kg, so one hand is enough when you lift it out. Watch that boot. When it splits, water sits on the stud and eats it from underneath, where you will not see it until the motor quits mid-season.
022000025. One number, no substitutes. I went through the open catalogues and there is nothing dependable to cross it to. More than one engine build went into these charging generators and the starting parts do not cross between builds, so read the label on your old unit, not the photograph on this page. If a seller offers a second number without showing the label, ask what it was crossed from.
Fitting. Battery off at the negative post. Two flange bolts, main stud, trigger spade. Both motors on the bench, straight edge across the flanges, count the teeth, and turn the pinion by hand to see which way it goes. Pinion out, mesh it into the ring gear, torque evenly. One bolt first and then the other will cock the flange, and a cocked flange eats the gear in about a week.
Faults. Brushes wear. Relays stick. Cables rot from the inside where you cannot see it. A hard single click with no crank is usually the relay or a ground strap, not the motor. Slow crank on a battery that holds 12.4V under load is the main cable. Spins and will not turn the engine, pinion or sprag. Put a meter across the relay terminals before you buy a starter, and look at the ring gear teeth while the motor is off.
Packing. One to a neutral carton. Ningbo or Shanghai, three weeks. Samples of one are fine, twenty for a run. Six months on DOA and winding faults.
| Brand | Model | Model Code | Year |
|---|---|---|---|
| DJI | Agras T55 | AGRAS-T55 | 2025–2026 |