"JBeck" wrote in message
...
Group:

I am considering adding a fuel transponder to my engine linked to my
Navman
5500 chartplotter. But, the tech info for the transponder says the
minimum
fuel flow must be over 1.3 gph. Can anyone tell me what the minimum fuel
flow for a Mercruiser 5.7L XL inboard is? TIA!

This is just a guess, but I think your engine burns more than that at idle.