Hello, I have a K2400 and it worked perfectly. Well a friend asked to borrow it and when I went to use it about 6 months later there was a problem. All hoses connected, I start the engine and pull the handle and it works perfectly. I let go of the handle and pull the handle again and there is no pressure. I remove the spray handle from the hose and re-attach and pull the handle and it works. let go and repress, no pressure. Any suggestions???