Bruce
As per my reply to GgordonN we have been off line due to, at least in part, a defective router on our computer.
I am back now (I hope) and have studied your reply. If this thread is still being viewed I have the following info to offer.
The belt part numbers you have listed would be way too long to fit my 5/26. Going off my IBS (Independent Bearings and Spares) catalogue and also off my 5/26 parts manual the belts I needed and have installed are 754-0187 (5/8"W x 24"L - outside) for the Lower variable speed drive belt and 754-0136 (5/8"W x 29"L - inside) for the Top variable speed drive belt. Both belts fit length wise OK and appear to "B" section (5/8"). I agree the tensioning springs may be a problem as there were non on the machine when I acquired it so I used other Victa springs I had that appeared to be able to provide a fair bit of tension. I believe I need two springs. One is the Variable speed spring (Victa P/N TM60172A and the other is the Extension spring (Victa P/N TM60184A) Would you know where I can purchase these from. ?