Quick answer is NO; but suppose is relative to how steep the hill is???
Fuel is drawn up to the filter by vacuum; ~75% of htat fuel is then returned to the tank via the return line. If it leaks it will not be much; you will prob spill more when removing the orig fuel filter.
If you are doing filters and the history is unknown to you do the pre-filter too. It is on the left most upper corner of the filter hosuing as you face it. Is about as big as your finger and has a 26mm dia o-ring beneath its rim that should also be replaced. The oring is purchased separately.
Be gentle on your stop button bolt. It also has orings (2) and should not be cranked down super tight. Just spin the filter on hand tight and give the bolt about 1 turn.