Husqvarna TE 250 Workshop Manual page 387

Disconnect the injection central unit connector.
STATIC ELECTRICITY MAY DAMAGE THE ELECTRONIC CENTRAL
UNIT PERMANENTLY. MAKE SURE THAT ANTISTATIC PROTECTIONS
ARE WORN WHEN HANDLING THE CENTRAL UNIT.
Disconnect the gear sensor connector.
Disconnect the pick-up connector.
Disconnect the generator connector.
Part. N. 8000 B0148 (02-2008)
"KIT" ASSEMBLING INSTRUCTIONS
O.45
REMOVING THE INJECTION CENTRAL UNIT
CONNECTOR
DISCONNECTING ENGINE CABLES