Hi check that the primer bulb has not perished thru age sometimes they split and suck in air instead of fuel you can remove these by taking out two little screws and check it out if it has perished or split renew it. If not check for blockage in pipe line in the one going to the fuel tank there should be a filter on the end of it in the tank make sure it is not blocked hope this helps Regards Jim
nottendjim ( mechanic), November 2006
