Fuel tank dip tube broken

So I fixed the high pressure fuel pump on my 94 this week and was getting really excited that I could run the engine and check some things this weekend.   I installed the pump, turned on the ign, and everything sounded normal.   I put a gauge on the Schraeder port to check my fuel pressure and got about 15 psi... Shoot.... Turns out that the pump can't develope pressure without any fuel .... I traced the problem to the anti siphon valve ( stuffed full of earwax) but the 90 degree angle was also plugged full.   I pulled the tank, and the pick-up assy, then unscrewed the aluminum fitting at the top of the pickup tube.    

How do I get the pickup tube out?    It appears that the fitting was connected to the dip tube some how,   Now the aluminum fitting appears broken, and there is a spring sticking out of the top of the dip tube ( inside the threaded bung for the aluminum fitting) Is there a repair for this? Did I screw something up?   

Just poking around this page:
http://www.nautiqueparts.com/fuellineandfuelhoses.aspx

It looks like that elbow threads into the tank, and the fuel pickup tube just presses on to it?

It's a little tough because I can't find a full diagram.

Some pictures would be good to go along with your write up. Really helps people that haven't done the job yet understand. Thanks for the great info.

I finally had a chance to download the pictures I took a week ago.... here they are with some explanation.

The 90° fitting that goes in the top of the tank, it's missing the nipple portion of the bottom. This was completely clogged with dried fuel, see BRI892001's post above for what it should look like.



The anti-siphon fitting, also clogged with fuel when I found it.   brake cleaner and compressed air worked well to clean it out

side view



end view : note that the ball is what stops the flow of fuel if needed. It is spring loaded in one direction, but the spring is not very strong, the ball should not be hung up at all when this is working properly.   I used a small screw driver to push the ball down, and let it spring up to ensure it was functioning.



Here is the dip tube assembly (with the new 90° fitting installed)if you look closely, you can see the helix inside the tube.   



here are all the parts laid out.   the brass fitting in the top of the aluminum assembly is for the return.   This is going to be for fuel injected boats only. Mine is, TBI, so assume that the dip tube and assembly will look a little different for carbureted boats.



Insert the dip tube into the top off the aluminum assembly, Teflon tape the threads, and then tighten until the fitting is snug, and the outlet is pointed in the right direction.   I had to fillet the corners of the aluminum fitting to allow it to thread into the bung without hitting the brass return fitting. here is the dip tube assembly going into o the boss.   note: I had to remove the strainer screen at the bottom of the pickup tube to fit it through the hole. the screen is a press fit, a little wd-40 and then a gentle grip and it should twist off.   



the finished assembly.   the dip tube is longer on the injected boats, so yours may not stick out the bottom of the aluminum like this.   



reinstall the anti-siphon valve with some Teflon tape, then reinstall the whole assembly into the tank.



this is long winded, but hopefully it will help someone

Nice! Time for another link to the FAQ...