genral riding question about bilge pumps

i have a 1990 550sx and it came stock without a bilge pump and is there anything i should know before hitting the water? does the bilge just pump water out if you flip it or...?
 

wetjet701

Always On
If your going to be doing freestyle and don't have a scupper valve you'll need a bilge. Without a bilge pump there is no way for the water to get out of the hull quickly
 
jhafsfas

ok awesome thats what i figured but wasnt sure and just wanted to double check. and is a scupper valve what people who do freestyle use? and is that what allows them to ride under water?
 

wetjet701

Always On
Scupper is a one way valve through the hull which lets water out. I don't like mine it's more of a sinker valve, I've had a few close calls with mine
 
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