2003-2005 Kawasaki Ultra-150 Jet Ski Factory Service Manual., Page 68Get this manual
FUEL SYSTEM 3-19 CarburetorFuel Pump
hke COercingth[Ase rubber parts for damage] Diaphragm [B] If any of these parts are not in good condition, replace them
h pi agm Chteickntoteinvacououdmconsdtotinon,iarphrlace it[.A] for damageIf ep pt sm Cahreckretthoart bhe yv.acuhuemsurisaon [of] tmeovpeiston oouthtlyniot the bu od ce ms be excessively wornIf the vacuum piston does not move smoothly, or if it is very loose in vacuum piston holder, replace the piston andor the holder