John I always Chang my primary filter and start the engine and run a few minutes then I stop the engine and change the secondary filter, I also cycle the key to run (don't start the engine). The elec fuel pump to prime the secondary it will run a few seconds then stop turn the key off and leave off about 2 min or less then cycle until you get fuel out, i forgot the wait time.On the primary you can use a 3/4 inch npt nipple to screw into filter to keep Fuel out of the outlet side of the filter.
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Walt & Will
2000 Dynasty
2017 Ram Big Horn Crew C 4X4 w/ M&G
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