I recently removed the fuel rank and filter to clean up and paint. but now everthing is refitted tje engine wont fire just tirns over on starter. I have been doing this for quater odlf an hour but still wont fire. when I swotch off ignition tjere is a slight gurgling from tje engonw for a few seconds and when I chwcked the fuel filter it was only half full. has the pump got clogged or something I can jear it priming. many thanls for any advice in advance.