Low RPM during initial start up of the electric fuel boost pump

[Rick A]

Lately when pumping fuel into Lyc IO360's fuel system before cranking to start up, the electric boost pump sounds sick.

It takes a few seconds to smooth out and sound normal. The fuel pressure comes right up during the initial short period of sounding sick.

Is this slow spool-up anything to worry about? Or is it time to replace it with another one, or to consider some inspection and maintenance on this one?

 

[Dan Thomas]

Next time you hear it get worse or slower, swap it before it fails on a hot day or during takeoff roll.

I wouldn't wait that long. It may slowly get worse, or it may just quit dead just as you need it. When the engine quits because its engine-driven pump failed, and the boost pump doesn't respond, you suddenly realize that you've probably sold your life for a few bucks.