The stalling sounds related to fuel or ignition and has nothing to do with the oil pressure. Check for spark when it dies, if you have spark look over the fuel system.
I've seen many H and M run with oil pressure barely registering on the gauge for many years. Low oil pressure can be caused by a bad relief spring in the pump, worn pump, or worn cam, rod, and main bearings. The general rule of thumb is 10 psi per 1000 rpm, so an H at 1750 rpm should have around 17 to 18 psi to survive.
If the engine isn't knocking or having at least a loud ticking sound, your oil pressure should be fine. In such a low rpm engine, volume is more important than pressure.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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