No belt number is needed. Just take your old belt out and measure it, and then search for Ariens belt of the same length and width.I'm looking for a new auger belt for this machine.
The parts list shows several with "notes". For instance....Note (122,332,508,507)
Is that the last 3 of the model?
I think I'll try the 400. Thank you.I cross reference the ariens 07238400 belt to be a 1/2 X 37" belt. Some sites have it also listed as 37 1/2 " long. So you can take old one off and try to measure it. Remember that if belt is really worn it will measure longer than when new. Hope it helps you in your repair