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Old 07-19-2017, 05:54 PM   #2
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,720
Re: duel fuel tank question

Another pic of the gauge switch? Most of the early trucks did not have a gauge attached to the different tanks. You just ran the tank down until the engine started to sputter and turned the valve on the floor and waited until the engine caught itself again. My 68 has dual side (travel) tanks with a 3 way valve on the floor, gauge only works on the seat tank. My guess is with what you are showing in the picture is when the valve is in that position is when you are on the seat tank. Any other placement of the valve and you on your own to guessing to when you will run out.
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