Does anyone know if the low pressure fuel pump on a BX1860 tractor can fluctuate in operation or is it a device that either works or does not. I've owned this machine for 8 years now and never had any issue starting the engine unless outside factors were involved. I'm am unable to start this machine for the life of me. I went through and ruled out entire fuel system by means of disassembly and reassembly. New filters and hoses. Removed fuel tank and cleaned the rot out of the steel fittings. Made sure I had a full return back to tank. Removed injector delivery pipes and checked fuel delivery. All ok. I gave up and really thought I would have to take it in to the bank. But before I would do this, I sprayed a bit of start fluid in. I bumped the starter and I finally had fire. I continued to bump for about 2 minutes because I know what this fluid can do to the machine and don't recommend it. However the machine finally started and ran fantastic. It ran for 2 days without any problems in starting until yesterday. I'm down to the same problem. Crank with no start. This happened after going up a bit of an incline and then I had used the bucket to lift the front of machine up as high as possible. At that point it would not restart. Could the low pressure pump have a hard time as the head gets greater? HELP