In Reply to: 8780xp fuel problems posted by Jeff71 on October 16, 2008 at 08:47:33:
Is this a mechanical in-line pump or the electronic version?If prior to 2000 model=mechanical -check the waste gate actuator diaphram.Unhook hose to waste gate & plug with a 1/4 inch bolt.Take to field & see if power is back.If diaphram is leaking you will not activate aneroid on injection pump to "fuel" the engine.Have had this happen on R series Gleaners prior to the year 2000.