View Single Post
Old 01-21-2014, 09:36 PM   #39
C lectric
Guru
 
C lectric's Avatar
 
City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 4,414
Couple things I wondered about.

You tested the tank vents by blowing air. That may not show a problem. If the hoses are kinked shut , under air pressure they would open up and show good. yet not be. If they are collapsing blowing air will not give an answer.. Just be sure as that is exactly what happend to me years ago, they collapsed.

I think in another thread you said you have vacuum guages on the filters now. Telltales types? Or did you think to read them on the monitor? What do/did they read when you started having trouble last time?

Dip tubes too close to the bottom? If as the fuel weight drops maybe the tank bottom is bulging up and partly blocking the diptubes. Try cutting the dip tube ends on about a 45o - 50o angle. Blunt the sharp end. This creates a larger suction surface area resulting in less velocity [I've forgotten the specific term] right at the entry but also if the tank bottom is the problem the cut will prevent blockage.
Or put a 90o fitting on to prevent this if you can get it in.

If this is the case when the engine quits then the tank may drop from the dip tube to quickly for you to see it on your monitor unless you were watching it at the time. The telltale guages would be better for this.

Did I see that you have rigged a fuel pessure guage. That should help at the next occurence to see if pressure drops and filter vacuum remains low.
You've been fighting this for a long time. Great persistence..
C lectric is offline   Reply With Quote