Just because we have been doing something for a long time doesn't mean we do everything correct. We all do something wrong. Take it online and have fun
Ran low in starboard tank that showed 3/4 full. Port was almost full. So 150 gallons of gas total and I "ran out". Had both tanks open and it was drawing from starboard tank only. Ended up drawing air from starboard tank and couldn't get engine primed on port tank. Ended up starboard sending unit was way off.