you pic isnt working. if you're gonna run your boat out of the water you REALLY need to disconnect your driveline going to your pump. a pump spinning out of water can damage the ring, some people will argue... but in the end its REALLY not worth it. 4 bolts, save yourself some headache.
all you need to do is pull the hose off the pump and stick one of these on it... home depot garden section... like $2. hook your hose up but do not turn it on full blast...

with the driveline disconnected and the motor getting water u can run it for however long you need... when you're done, slap the driveline back on, tq the bolts properly, and put your water hose back on the pump and tighten it up as well. doneski's.