There was quite a discussion about someone having difficulty getting one of these engines re-primed awhile ago and it should be in the archives. Also by dumping the old filter oil into the new filter I wonder about some junk in the filter being transfered like water in the bottom of the old filter etc. It might have dosed your pump. Should really only put clean fresh fuel oil into the new filter. Hopefully you got it running before reading this note or the archives help.