** i have a 21′ pontoon boat with a small 50hp outboard. plans for building a cantilever boat lift – any ideas? just keep in mind feet and pounds, ft-lbs.. Reinforced vinyl wrapped aluminum long v bunks. help guide your boat onto the lift and gently support it without damaging the surface. fully adjustable to fit your pontoons.. The new pontoon boat lift trend. to “today’s pontoon boat lifts match todays pontoon market capacity and length of the plans necessary for your boat,.