Thanks AVB, I think you could be on the money, I have found a few with holes in the tube, worn around the "O" ring. Guess I should have looked closer at those bits but this mower appears to have done very little work, it hasn't been cleaned up and still looks in excellent condition. Problem is as you say they really are not worth the time/effort because replacements are cheap. I also fixed up for my mate a Victa 2 stroke utility/slash, probably late seventies early eighties which he had brought here for me to get running so he could use it in his mowing business. By the time I repaired the axles,base,new rings,modified the carby, changed the blades and blade carrier and got the thing running as it should, I had spent about 8 hours on it. I charged him $40 for the parts I used. I told my wife yesterday that I will set myself a challenge to fix at least one mower a week for the next 12 months and that should make a big impact on the pile of mowers I have here, as long as I don't get any more!!