our series three had stood outside for 12 years uncovered and with some jump leads started first time on 12yr old petrol and ran fine, the clutch was seized though, we left it running for about 20 minutes and it came free with the heat, but otherwise I hear the trick is to put it in low box and in gear start it and it might break free, but I duno how you're meant to manage that with only two legs and two arms, sounds a bit hectic! Good luck