wayne moureau here new member have 1997 liberty we purchased in 1997 ,parked in bus barn in magnolia texas ,heat or cold not problem .i start bus at least once a week the last time it ran for app. 15 minutes then shut down as out of fuel have over 1/4 tank have been told to replace fuel filters and refill several times to get fuel to motar. i have a racor model 1000fg. primary and a napa secondary filter .my question is how do i drain and refill the racor filter thank you wayne moureau