I would go with debris in the tank until proven otherwise. My 38 was doing that and it turned out to be debris in the float bowl. It doesn't take much to block the hole.

@tiny @junky Gary and Tiny, I made a "nurse tank" years ago. I use it for first start-ups and situations like yours to isolate or eliminate the tank as a fuel delivery problem.

Start with an inexpensive plastic gas can, a tubeless tire stem, the kind that is threaded and has neoprene washers and a nut for sealing into the tire rim, and a length of 1/4" fuel hose.  Drill a hole in the can and install the tire valve for use as a hose fitting. Once the hole is drilled, use a length of wire through the hole and out the filler hole. Slide the valve stem over the wire and let it guide the stem down to the hole where it can be secured in place as a fitting. Use clamps as required to secure the hose to the fitting and carb.

This contraption can be hung from a radiator brace rod to gravity-flow fuel into the carb when the tank is suspected of being a problem. Remember to leave the cap a bit loose to vent the tank and disconnect the fuel pump from the tank when you go for a test drive. This arrangement can be used with the fuel pump connected to see if the pump is working.

I have had some version of this tool for almost 50 years and have used it countless times. 

Mike

Tiny and Mike,  you guys suspect the gas tank with debris maybe causing my delimma.  I can understand that debris in the gas tank may somewhat clog the outlet port of the fuel line just enough to supply a low flow of gas for startup (low RPM's) but once the engine starts with higher RPMs and requiring more gas feed in the carb, the carb bowl runs out of gas due to the small flow from the clog.

Luckily, my gas tank, easily accessible, has a petcock right at the fuel line connection to the tank.  I can easily drain the tank and inspect and clean out any debris in the tank.  In the process of the tank clean out, I can use a coffee filter to pour the clean out process to review what was in the tank.  I'll take pictures if necessary per any findings.  And of course use my air gun to clean out the open port at that clean out time.

As I originally said, there was no debris in the glass jar/filter unit nor was there any debris residing in the fine brass filter screen.  that's why I thought it could be a stuck needle.  I'll do the tank clean out before touching the carb.

Since I had the glass jar/filter and the brass filter screen removed, I replaced the brass filter screen with the new paper filter unit for this assembly.

I'll be back with my findings this week.  One step at a time to see where the problem exist.  Tank clean out first.

Thanks, much appreciated!!

"BACK ON THE ROAD AGAIN!"

So yesterday I drained the tank, flushed the tank and fuel line, and problem resolved.

As I used the tank underside petcock/fuel line stop valve, I removed the valve stem of the stop valve and there was no gas draining from this open port.  So I took a large paper clip and formed the clip material to be straight and inserted the paper clip into the open port and low and behold, the gas started pouring out.  So there was my clog.

I drained the tank completely and removed the tank and blew out the fuel supply line to the fuel filter.  The gas from the fuel line was 100 percent clean.  Then I used a gallon of vinegar in the gas tank, shook the tank for about 20 minutes and then poured out the contents through a coffee filter.  One of the large specks of debris is a beetle.

I would relate that beetle and debris to the past owner which probably used old gas from some open container and pour its contents into the tank. The few gallons I have used, since my recent purchase of the truck, has been from my newer gas containers and by hand getting gas at the gas station with those containers.

When my problem began, I was running low on gas in the tank, and instead of adding a gallon or so (there's no gas gauge), I took a chance and decided to head straight to the gas station, about a mile away, and I got about a quarter mile from home and the stalling out problem began.  Therefore some of that floating debris got lodged into the outlet port and created the problem.  I also carry an onboard 2.5 gallon filled gas container on the passenger side running board.  Yeah, I have run out of gas two times and was not tracking my fuel intake and mileage (learning curve).

My tank is very small, roughly an 8 gallon tank capacity and it was easy to remove and handle.  Before I used the vinegar, I inspected the inside of the tank surfaces and its like new inside.

Thanks Guys for your input on doing the tank first.  I was thinking of a stuck needle in the carb.

Here's the pictures of the tank debris I removed.

I'm happy you got it figured out.

I wish you many miles of happy motoring.

Mike