Originally Posted by avazquez
I have a small 5kw diesel generator with a z400 2 cylinder kubota engine that runs at 3600 rpm. The original mechanical lift pump is cracked and leaking. I would like to replace it with a Facet electrical lift pump but not sure which one. Phasor generators use the Cube Solid State Facet pumps with success. The question is which one fits my little engine? I called Facet and they recomended the 40185 model with a lift of 36" min and a flow of 32gph at 9 to 11.5 psi. It seems like 32 gph flow is kind of high but I am not sure. The generator is about 25 feet away from the tank and about 2 feet higher. Any suggestions?
I. A bit rusty on this but I did something similar so bear with me with these thoughts....
Firstly I have the feeling that 9 -11 is a bit high, don't they make one with a little less, I think I have a Walbro with 4 -7 but could be wrong.
Next, you have to fix the mechanical pump or you might run the risk of pumping diesel into the sump through the cracked rubber diaphragm
Next , the new pump should be able to suck through it when it is off, this way it works as a backup.
Next, your reasons for making this change are for the wrong reasons, by making this addition, you will add an easier method of bleeding which is an added safety
feature in an emergency
as bleeding becomes a much quicker activity. Plus there is another method of providing the engine with diesel in an emergency
Next, the design should allow the pump to be switched off, so it is not on all the time. The mechanical pump should remain as the main pump.