Jump box for dual battery 7.3 diesel
I started thinking about items I might need as a new RV’r, jump boxes came to mind. I’ve looked at a few video’s online of large diesels requiring higher amperage jump boxes when their batteries are ...
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All the 7.3 Diesels that I have seen, and I have one, carry two 850 + AMP parallel wired batteries for the chassis. It is near impossible for both to die beyond a start up without being neglected in maintenance. I have two of them sitting in my shop due to one morning during a recent cold spell I had to activate the glow plugs twice to get a start up. My next trip was to get two new ones. They are maintenance free except keeping the terminals and cables clean. Six years is a good life for the batteries and they had served well.
Unless the two batteries are both totally dead a 750-850 AMP battery booster should start a good tuned 7.3 with the aid of the weak chassis batteries. I recommend under such time to activate the glow plugs 2-3 times before attempting a start. Preheat the cylinders and do not depend upon the compression solely to do so. If equipped with an engine warmer use it before attempting a start. That 15-40 engine oil gets stiff sitting in cold weather.
Unless the two batteries are both totally dead a 750-850 AMP battery booster should start a good tuned 7.3 with the aid of the weak chassis batteries. I recommend under such time to activate the glow plugs 2-3 times before attempting a start. Preheat the cylinders and do not depend upon the compression solely to do so. If equipped with an engine warmer use it before attempting a start. That 15-40 engine oil gets stiff sitting in cold weather.
