We canned all manner of goods for decades. We have several canners and mostly used the old Presto/National. It holds 7 qts and something like 14-16 pints. I bit the bullet and bought a big 941 All American a couple years ago. Glad I did. Not only do I not have to keep extra gaskets on hand, but it holds double what the old P/N holds. That equates to only having to can for half the time.......assuming you, like me, believe the gauge watching is the most boring canning chore there is!

[quote=J.Morse] We canned all manner of goods for decades. We have several canners and mostly used the old Presto/National. It holds 7 qts and something like 14-16 pints. I bit the bullet and bought a big 941 All American a couple years ago. Glad I did. Not only do I not have to keep extra gaskets on hand, but it holds double what the old P/N holds. That equates to only having to can for half the time.......assuming you, like me, believe the gauge watching is the most boring canning chore there is![/quote

AA 941 should have both gauges , a weight and a dial gauge.
If not you may of bought an older used one .
Even then you can add a weight gauge to it.
Once you get the pressure you need , you should be able to ajust the flame , and just listen to the weight jiggle or hiss.
If it changes any , then check your dial gauge.
I go here for parts and manuals , they carry parts and manuals for almost every canner/cooker made.

There's other sites , but I like this one.

https://www.cookingandcanning.net/nationalold7.html