priming the tube with gasoline ?
if you own a hobie i would recommend forking out the additional cash . you will be lucky to find used one . i bought one in 2010 and the pump is still running strong . it is missing a rocket tube from losing control of yak while trying to launch under other than favorable conditions . nothing a little j b weld could not fix . good as new . and the battery has been replaced as expected . the switch took a dump early on but most users have it bypassed . if you do not have a hobie different scenerio . save your self some headache and let the pros put it together . or roll a big one and spend some time in the garage ?
