Cub Cadet XT1 LT50 679cc Lawn Tractor Starter Motor | 12V 0.8kW 10T CCW | OE 725-04439

The XT1 LT50 is a big-deck tractor with a small starter, and that mismatch shows up as slow cranking long before anything actually fails. When it does fail, this is the motor that goes back on.

Cub Cadet builds the LT50 around a 50-inch fabricated AeroForce deck and a twin-cylinder engine in the 24 hp class. The starter bolt pattern and the 10-tooth counter-clockwise pinion are what this listing covers.

Construction is permanent-magnet direct drive: copper stator, copper rotor, plated steel barrel, sealed bearing at the drive end. There is no reduction gearset inside, which is why the motor is short and why there is nothing in it to strip under a hard start.

The flange is a two-bolt pattern with 8 mm holes and a pilot spigot for centring. The factory heat shield and the original bolts transfer from the old motor, so nothing extra is needed.

Check the battery first, then the solenoid. Cub Cadet tractors are known for a solenoid that clicks and does not pass current, and owners buy a starter when the relay was the problem. A quick jump across the two large studs will tell you which side of the circuit is dead.

When you refit, clean the engine-to-frame ground and the battery terminals. A poor ground raises the current the motor has to pull, and that is what cooks windings.

Crank in short bursts. These motors are not rated for continuous running, and the pinion should not be held against a flywheel that is not turning.

The XT1 LT50 has been sold since 2015. Deck material and engine supplier changed across the years, but the starter boss and the pinion geometry did not. Fitment is listed for the LT50; the smaller LT42 and LT46 tractors use a different engine and are not covered.

We have no bench data for torque, current or no-load speed on this unit, so those fields are left out rather than filled with a number we cannot support. What is stated is what the part is: 12 V, 0.8 kW, 10 teeth, counter-clockwise.

Shipped as the motor only. If your old motor came off with a spacer plate or a shim, keep it and put it back; the flange depth is set by the boss, not by the motor.

Lead time is 15 to 30 days from stock, minimum one piece, twelve-month replacement warranty on the windings and the bearing.