Steve, I found the reference to "limitations on RPM" From the "D" handbook, and concerns the 1A-90 prop. " Note: Avoid continous engine operation between 1830 and 2020 RPM with McCauley 1A90 Propeller."
This is in reference to a C-75 engine installation; does not appear under the C-85 specs.... So does it apply to a C-90 ???? Yes if it shakes, would by my thought. I don't think having excess fuel in your airplane is proper. ---that fuel gushes out if I remove a wing tank cap- I would review the plumbiong.. Sounds like you are pumping from one tazanke to the other swomehow -- or completely draining the header.... Only way I could visualize this is by filling the header when refeuling -- DON'T. It should be kept full by the fuel pump, with excess overflowing back to the wing tanks - which are interconnected. So neither wing tank should overflow or have pressure on them.... But, if you refuel, fill the wing tanks to the brim, then fill the header tank to the brim, then you ahve added about a gallon more than airplanes capacity, and some day it will overflow somewhere --- wing tank guages, bad gasket, etc....Don't fill the header tank when refeulling.......only the wing tanks..... Fly Safe, Have Fun 93530 Harry
<<attachment: winmail.dat>>
