Hi Jack.
Thanks for the heads up, I have very little back lash in the drive drum and the drive pulley so hopefully no issues, fingers crossed.
My 430 has a 2.5Hp B&S that has output shaft bearing slop.
The grub screw on the shaft coupler is missing and I would say for quiet a while that allows the shaft to wobble and tear the bearing and seal out.
After much thought I looked thru my collection of manuals mostly radio and car manuals and found some that may be of interest to the group.
I will upload pics to my post on model 33.
Banjupb