Hi Marc
If you are still after info on your mower (your post was almost 3 weeks ago)your model sounds like my Diplomat 430. I built mine out of 2 diplomats about 14 years ago so I can't quite recall about dissembling the clutch. I do have a part explosion if you need it, let me have an email address and I will send it to you as an attachment.

PG
My Mowers:
SB Model 45: 17",3hp, Model No:21339, B&S Model 80202, type 1735-01, Code 82111901
SB Model Diplomat 430: 17", 3hp Model No:1414, B&S Model 80202, type 0880-01, Code 79110101