Yes, if you have access to those gauges or want to spend a wheelbarrow full of money on gauges you won't use again, that may identify the problem.
If you want to use logic with less work and no money, this is the case for that.
Next step after riser test. Disconnect fuel line at pump inlet and attach a hose down to a gas can sitting in the ground. The pump will suck the gas into carb as you run the motor. See if it runs longer than 15 min. This will bypass the tank and show if trouble is upstream of pump and it will help verify if pump is good or bad also. Report results.
If it still dies:
Disconnect fuel line at carb and attach hose to carb inlet and feed carb from a container using gravity. This, of course, eliminates the pump. Report.
Don't know your expertise on these things so don't mean to talk down to you, but if you need help with how to do this hose plumbing, post some pics of how your carb and pump are plumbed. You may or may not need to get a hose barb fitting or two.
