UPDATE:-
WILL PUT A WASHER BETWEEN THE DISC AND THE BOSS.
The only washer I could source was a disc spring washer from an early 160 (1/2 BSF, round type) and file the notches out so it was a snug fit on the shaft, but this washer is only 2mm thick, 2.2mm was needed.
As I was going to spruce-up the mower, replace drive belt etc. etc; I pulled out the engine and knocked off the boss an carefully filed 0.2mm from the shoulders (as shown in photo).
[Linked Image]
This should allow me to be able to use the original plate, if ever needed.
I am doing this conversion to (1)Get a better cut (2) Get a better cut at lower revs so I can WALK behind the mower not TROT.
I don't mind doing all this rooting around as I plan on keeping this mower forever.
Will let you know how it preforms when project is completed.
LS

Last edited by Lawn Slave; 31/05/11 09:58 AM.