Ohhh thanks BB. I didn't even think of that! I'll have a read and follow this process during the week.

The fourth mower (I know - I've lost it) that I picked up is a 20 inch. I haven't posted any photos of it yet as I've been preoccupied with this restoration. Once this one is done, the 20 inch will be next on the list as I'll be keeping it for myself. I picked it up for $50 in Brisbane a few weeks ago. It looked like they put it into storage for a few years because the thrust pad had melted. I got it running for peace of mind and then moved on to this one. Sounds like it could end up being the best deal of the lot.