Always worth fitting a new capacitor on an old motor, costs just a few quid.
However, I doubt that ST Amps is starting amps; it is more likely to be stator amps i.e. what is nowadays usually referred to as Full Load Current (FLC) - and in the case of your saw, continuously rated at 12A.
12A is about normal FLC for a single phase 230V motor but starting current could briefly be 6 to 8 times that i.e. 72 to 96A and that is almost certainly why you are blowing fuses. On my 2hp bandsaw I can get one start on a 13A fuse, but it blows upon a second attempt.
Install a proper 16A supply via your consumer unit and a Schuko or Commando type plug and socket and you should be fine.
Your consumer unit takes Miniature Circuit Breakers (MCB), usually type B in a domestic setting. Some would recommend a type C MCB, as they are not so quick acting and deal better with the start current, but something like your saw would probably be OK on a type B.
Ask an electrician to wire it in properly, then you'll never have to worry again!
Duncan