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The run signal goes through the EESS to the IP, you would want this circuit to be completely separate from all others, run straight to the batteries with of course a fuse, that way if any or all other circuits fail you can still shut down the engine, in IMHO not actually a very desirable way to...

You would run a battery hot all the time wire through a momentary switch to the solenoid, the only time it would be used it to shut down the engine, any time the engine starts turning it will try to run, you must have 24V available to shut it down so that opens a whole new can of worms in your...

As stated above you will likely damage the IP from repeated lack of cooling fuel and lubrication, also re-starting will no doubt require a ton of starter time as you will likely have to re-prime the IP every time. (that would be real handy if someone was shooting at you!) You will also be dead...

What possible scenario would justify all that work? if a solenoid failure is the only motivation then just carry a spare. I will now get off my soap box and retire for the eveningo_O

OK, so you figure out how to "run" the engine without electricity, so how are you going to start it?????? If you have enough battery to start it you have enough power to run it for MANY hours if you conserve what you have. AFAIK no modern automatic transmission has a rear pump, for those that...

And you must seal that cable, there is fuel pressure there.

The small one is the cold advance, man it looks like a bunch of metal "filings" bunched up around the run solenoid plunger...

Well the solenoid trips a lever in the governor housing on the IP. I would not be surprised if Roosa Master did build pumps with mechanical shut down but I cannot ever remember seeing one. I think allot of other things are going to fail on you before the IP shutdown solenoid...... But no you...

The HMMWV does have the 5 point security screws, be very careful when messing with the IP, I have read that the top cover can be incorrectly installed causing a runaway engine, but have not seen this myself. The run solenoids are pretty reliable, not one of the things I would be concerned about...