[QUOTE="Lozzo"] Champ wibbled incoherently... You might like to know that some valves do stick just slightly in their guides, causing a lack of compression, without pistons hitting them. However, you do usually get some warning signs, such as a sound like a badly adjusted tappet, and loss of performance. [/QUOTE] I had an old short wheel base Landy[1] that did that. You could leave it for six months and the battery would be flat. Pump up the petrol with the little hand lever under the fuel pump until you got pressure. Ignition on choke out. Turn it over on the starting handle a couple of times, noting one or two valves that would not quite close giving no compression. Find a cylinder with compression. Hoik it over that one *with feeling* and off it would go every time. Rev it a few times and it would seat the stuck valves and fire on all four. [1] Ex military. The ones with the *huge* filler caps under the front two seats.