I don't know if the 301 is the same as 301A, mine is mocha colored and has a knee lever instead of the foot pedal.
If you have that little door to the left of the throat plate and needle, lift it up and way to the back is a plastic screw about 1/4" or more in diameter, you hand turn it, there's resistance on mine even though I oiled it underneath the machine, to the left as far as you can without making it really tight. Then, close the door and see and feel if your feed dog is below the throat plate.
Actually, I'm brand new to FMQ and I left them up a little and it worked for me, but some lower them all the way.
I know I don't have the experience but after an hour was making some progress with controlling machine speed and hand control. Maybe someone else will offer their experience.