In case he/she doesn't respond, check the following:
The choke butterfly shaft may be binding or gummed up. Spray the choke and surrounding area with carburetor cleaner
Check the resistance of the choke heater from the terminal to the housing. Should be 20-22 ohms when cold.
Check the voltage to the choke heater when the ignition key is on. Should be 12 v to the heating element.
Check to make sure the idle-up diaphragm and choke opener are free to move.