If you go to the photo gallery, there is a larger photo of the mower; I wasn't sure how small a thumbnail photo would be.
I followed Tezza's advice and 'she' isn't perfect but 'she' has more self propulsion than 'she' had. I actually mowed the back yard after adjustments. I found the operating manual in my fire evacuation suitcase; which doesn't help much but it did have a few pictures. I adjusted the clutch by tightening the bolt where the clutch cable goes, but I may have tightened it too tight or something because the clutch lever is very tight and 'she' wants to keep going after I release the lever. As suggested in the manual, I adjusted the blade drive chain and attempted the clutch and drive wheel chains, but the directions in the manual said the C & DW chain should have a 5-6mm (up&down) movement. Is this up & down off the sprocket teeth?
I will research where the clutch plate is and investigate it as well.
In answer to 'Mowernut', the mower when operating correctly, handles very well; turning easily and manuvering corners very well.
Thanks again to everyone with their advice and feedback!
Irish Rose