Fuel tank pickup tube

[GRANBATEAU]

I have a 1978 Cruisers Yachts Gran Bateau with a 75 gallon fuel tank. I removed the anti siphon fitting and then the 90 degree elbow the anti siphon fitting threads into. This elbow was threaded into the tank but when I removed it, there was not a tube attached. However, looking into the threaded hole in the tank, it appears there is a tube there and seems connected somehow to the bottom of the threaded piece into which the 90 degree elbow threads. I took these parts off initially because I could not get fuel to the engine by cranking the engine although I could get some fuel but not much at all out of the line that goes into the carb using suction. The tank has approximately 5 gallons of gas in it so I was thinking either I need to add more gas or the pickup tube is broken. If the problem is the tube how is this removed? I tried an easy out but no luck.
I apologize for the long description. Any help or suggestions would be greatly appreciated. .

 

[Bondo]

Ayuh,...... Welcome Aboard,...... I've found fuel dip-tubes like that before,.....

In my case, the in-tank dip-tube was 1/2" id, 'n the elbow was 3/8" pipe thread,......
I reamed out the tank side of the elbow with a drill, 'n sweat in a dip-tube of 3/8" soft copper tubin', cut to length, just off the floor of the tank,.....
Screwed it in, hooked it up, 'n it worked just fine,......

What diameters are You seein',..??

 

[GRANBATEAU]

Thanks Bondo. I really appreciate the answer. I measured the OD of the threads on the tank side of the elbow and it measured approx. 5/8" at the top and a little more than 1/2" at the bottom of the elbow threads. The ID of the part of the elbow that screws into the tank is 1/2". Therefore, I'm thinking I could do the same as you did. I assume the slightly smaller tube will still supply enough fuel for the engine. It is a 305 ci, with a Rochester 4 BBL and 225 HP..
A couple other questions please. Did you remove your old tube or leave it in the tank?
Also, my elbow fitting is aluminum and to do the fix like you did, I would need to switch to copper. Do you know if using a copper elbow in an aluminum tank causes any issues such as galvanic reaction between 2 dissimilar metals? Lastly, did you cut the bottom of the new copper tube straight and parallel with the bottom of the tank or cut it on a slant and did you put on some type of screen?
Again, thanks so much. I really appreciate all of you time and help.
Have a good evening.

 

[Bondo]

Ayuh,..... Yer thread description sounds like 3/8" pipe thread,.....

You'll use a Brass fittin,.... No real corrosion issue with the metals,.....

The 3/8" copper tubin', I cut with a tubin' cutter, so, square ended, just 'bout a 1/4" off the bottom of the tank,......

The original dip-tube, I just left it alone, No reason to mess with it,....

No screen, that's what fuel filters are for,.....

 

[GRANBATEAU]

Got it. Thanks so much. This will save me a lot of time and headaches.
Thanks again and have a good day.