Z254 husqvarna after start left wheel creep while still in park position

Low battery? Bad solenoid? bad starter? Could be a number of things

Question edited for name of maker and '(what it is)'.
Question moved from Cars and Trucks.

See if the videos help.

https://www.google.com/search?q=husqvarna+z254+drive+tension+spring

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Possible seat switch. Try rising out of seat and sitting down hard. If problem abates then replace seat switch.

On this model I believe you can disconnect the seat switch and it will start and run (there won't be an operator not in seat safety, so reconnect after testing). Disconnect seat switch and try moving levers and see it problem goes away.

https://www.manualslib.com/products/Husqvarna-Z-254-3885643.html

are you sitting in the seat? there are several cut off switches on 'modern mowers'.

Bad wiring to pto or electric coil in clutch is burn't.

Two year warranty in many countries, check the wiring has not come adrift from the clutch.

There is adjustments on both steering arms located under the seat. You can make the adjustments by lifting the unit's wheels off the ground and determine if the are "creeping" when the unit is running. Adjust the linkage until neither wheel creeps. Then the tracking can be adjusted by turning the screws located at the base of the steering levers.
Note, the levers do not return to neutral automatically.

set deck height to 1