2003-2005 Kawasaki JetSki Ultra-150 Factory Service Manual, Page 42Get this manual
PERIODIC MAINTENANCE 2-13 Periodic Maintenance Procedure
Bilge System Flushing
To prevent clogging, the bilge system should be flushed out according to the Periodic Maintenance Chart, or whenever you suspect it is blockedDisconnect both bilge hoses at the plastic breather fitting [A]
bilge hoses (from to Connect thehoses, filter the water on, the hull bottom) for the garden turn and flush it out about minuteDuring this procedure, water will flow into the engine compartmentDo not allow large amount of water to accumulate in the engine compartmentConnect the other hoses (from the hull bulkhead) to the garden hose, turn the water on, and flush it out for several minutes