which one did you buy ??
my dad and i have purchased 2 different ones both claiming to be for that purpose and neither inflated our pontoons at all. We have Fishcat pontoons
--did you have correct adaptor for the valve on your boat?
--I just use a cheap coleman electric from Can tire then hand pump to firm up if it needs it when I get to where I'm going.
--I'm sure the outcast one is good and will last longer than the $39. pump but I've used it for 3 yrs now... only problem I have with it is people borrow it and don't bring it back .
--Hand pump isn't that bad as long as you dont have to deflate boat totally each time to pack it away... I usually have ith 3/4 full so not much to top up.
--Have to be careful as when I go from valley bottom to Coquahalla connector could blow up the boat if to much air in it at valley bottom .
--Same deal cold air and water may want to top up at the lake or river.