2003-2005 Kawasaki JetSki Ultra-150 Factory Service Manual, Page 71Get this manual
3-20 FUEL SYSTEM CarburetorFuel Pump
Pop-off Pressure Inspection
the fuel inlet Pullcarburetorand return hoses out of their fittings on the Connect the hose of the air-pump gauge tester [A] to the fuel inlet fitting [B]a finger Press down the fuel return fitting [C] securely with reached Pump the tester until the inlet release pressure is (seen by sudden pressure drop)Pop-off Pressure Standard: 108 kPa (1.10 kgfcm, 15.6 psi)
Pressure inspection should be performed three times to
obtain correct reachingIf the pop-off pressure valve is not specified inspect the float arm level (see this chapter)
CAUTION
Do not stretch or cut the float arm spring