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My fuel gauge on my 91 GQ never gets below a quarter. I've found a couple of threads suggesting checking the earthing or electric contacts - I suspect it is sludge in the bottom of the tank from dirty fuel here in Tanzania.
1. Is there a way I can check the bottom of the tank without removing the tank to see if it needs a cleanout?
2. Is the hatch in the picture below able to be used to pull out the float assembly for the gauge - again, can I check the electrics without removing the tank?