With or without a gas tank, there will be a solid bulkhead blocking access to the bilge. I replaced the pump in my T-22 (I can barely reach the hull, too) using a long handled screw driver, and a long claw pick-up for retrieving/placing stuff. When ready to reinstall, super glue the screws to the screw driver, the bond is easily broken when tightening the screw. True backyard mechanics is an art form ... :wink: