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Prairie Home MO | I have a C-10 cat in a 99 international 9100. If it sits for a day it loses prime. It will start for about 30 seconds and then die. Pump it up with the primer and pour fuel in the filter on the RH side and eventually it will start. Doesn’t matter if it’s nose up or down or full of fuel. I replaced the hand primer already because it broke. 2 hundred gallon tanks on the truck with 2 fuel lines going to each tank. Anybody have a fuel system schematic or any ideas on why it’s losing prime? I’ve never had to work on a Cat fuel system before. Thanks
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230F1B09-786F-4B1D-BD84-45450C036BD1 (full).jpeg (132KB - 296 downloads)
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C-10 CAT losing prime
