Suzuki DF200/DF225/DF250 V6 4-Stroke Outboards Service Manual, Page 176Get this manual
FUEL SYSTEM 5-17
EVAPORATION PURGE SYSTEM
SYSTEM INSPECTION
1Warm up engine to normal operating temperature2Disconnect purge hose from fuel vapor separator 1! Do not suck air through valveFuel vapor inside valve is harmfulPurge valve
3Blow into hose A, air should come out of hose B4Stop engine, blow into hose AAir should not come out of hose B5If check results are not satisfactory, check vacuum passage, hose, purge valve, wire harness and ECM(See page 3-xx