Thanks for the replies.
I've downloaded the manual grumpy and that will help greatly. My clutch setup seems slightly different to the one in the manual but I'll check to see if I can get any adjustment before I pull it apart. If anyone has any tips on this particular clutch that would be appreciated.
Deejay I checked out the spring on ebay. Is that one good for the Atco? The broken piece left on my mower seems to have a hook that fits neatly under the kickstart lever. The hook appears to be missing on the ebay spring.
Bruce thanks for the information on the clutch machining problem. I'll see how things go with adjustments first and if that fails I'll get in touch to see if your contact has any units left.
As far as the sharpening goes I hear what people are saying and I'll chase up a local engineer. Any recommendations from Brisbane members would be appreciated.