It was far from a dominant display in a dour match, but the Eagles led from start to finish in the 11.10 (76) to 9.10 (64) win.
A late charge from the Lions added some spark as they drew within five points, but a Mark Hutchings goal inside the final two minutes snuffed out any hope of a win for the Lions.
For the Lions, Stefan Martin continued to justify his place as No.1 ruckman, while teammates Dayne Zorko and James Aish were all solid.
West Coast's win sees it sitting in 11th place, still a mathematical chance for an unlikely finals berth. Gold Coast is in eight place, two wins ahead of the Eagles.
The Lions are anchored in 17th with four wins.
BRISBANE LIONS 1.1 4.3 6.6 9.10 (64)
WEST COAST 3.2 5.3 9.5 11.10 (76)
GOALS
Brisbane Lions: McGrath 2, Green 2, Merrett, Taylor, Patfull, Mayes, Harwood
West Coast: McGovern 2, Smith 2, LeCras 2, Shuey 2, McGinnity, Hutchings, Darling
BEST
Brisbane Lions: Martin, Zorko, Lester, Harwood, Patfull, Hanley
West Coast: Shuey, Priddis, Lycett, Masten, Gaff, Mackenzie
INJURIES
Brisbane Lions: Nil
West Coast: Sheppard (ankle) replaced in selected side by Wilson
SUBSTITUTES
Brisbane Lions: Marco Paparone replaced Claye Beams in the third quarter
West Coast: Simon Tunbridge replaced Callum Sinclair in the third quarter
Reports: Nil
Umpires: Leppard, Hosking, Pannell
Official crowd: 13,610 at the Gabba
