I would check the glow plug... sometimes when its hard to start, loosening the glow plug to relieve compression makes it easier to start. If you forgot that you did that, it would explain the fuel leak... the carb could be a problem, but usually they don't leak up to the head..... clean it off and see if it comes back.... another could be the bearings on the engine... the rear usually leaks at some point and the front can leak... according to cen its not a big deal....