Originally Posted by
afioretti
Hi... I really don't have any suggestions here. I think you need to have some alternate parts to start out. Make sure the propane and fuel inlets are not mixed up as that would cause you some issues but i doubt you'd reach 75k with the inlets mixed up. Without a known to be good pump, and real working knowledge of the engine you might be chasing your tail.
Try flushing the pump and running fuel through it circulating it for while. if it seems sluggish take it apart. there are only two screws but be careful not to lose the gears the pin or the o-ring in the cover. I would use 5volts to do this. I don't know that I lean toward the pump here but this is all guess work and I am a mechanic so I take known to be good parts and rule things out so you can deduce what is wrong without guesswork
Andy
Hi Andy,
I have the working knowledge of the gas turbines as I have been making micro gas turbines since like 5 years now. Made around 6-7 working engines on my own (just that they were not for RC purpose) but for power generation.
I haven't quite worked with this micro pumps as I never used them so that's where the problem is.
To me the pump seems to run fine without any sluggishness. And the fuel lines are surely not mixed up as the engine will surely not reach 75k rpm with 1 lb propane can for extended duration.
I am quite sure that its not the pump but in order to be 100% sure I need to have a reference point to compare it with. If anyone can provide me any symptoms of a failing pump. Flow rates or power draw at priming etc.)
Just some calculated guess work here.
Thanks.