4108 was rebuilt a few months back in Calif. I had the yard install a new duel Racor
500 fuel filter
with the 4 way valve and the gauge. I did not get any instructions with this unit. The valve and filters work great but I have yet to see any movement on the gauge. I know it is suppose to measure restriction in the fuel
flow and on the crossing to Hawaii
I had to change from one filter to the other. the needle never moved. Should I try bleeding it at the gauge?
Thanks for any info. David B.