Notes on avoiding damage to ignition system - AH15.10-P-0002-01AK

ENGINE 266.920/940/960/980 in MODEL 169.0/3, 245.2 

• Before detaching the engine wiring harness connector or the vehicle wiring harness connector on the ME-SFI [ME] control unit remove the transmitter key from the EZS control unit.
• Do not operate the ignition system when the electrical lines are not correctly connected.
• Do not disconnect the electrical connectors at the ignition coils at starting speed or when the engine is running.
• Only install original ignition system components.

Additionally for model 169, 245: 

• Do not remove ignition cable from the ignition coil or the spark plugs at starting speed or when the engine is running.
• Check ignition cable and its sheath, replace if necessary.