Do the early Top Guns say 1990 to1995 have a common fuel line between the fuel tanks so the level is always same in both tanks or are they independent of each other

I'm pretty sure they are independent.

They are independent, & are nearly out of fuel when they hit 1/4 on the gauge. Just fyi.

totally independant. My port motor for some reason always takes about 15 gallons less than the other for some reason... and BLee hit it right on the head, when the gauges read 1/4, they are about dry! ask me how I know that.....