2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Repair Manual, P/N 5005483, Page 105Get this manual

2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Repair Manual, P/N 5005483, Page 105

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FUEL SYSTEM FUEL SYSTEM TESTS
Results
If pump does not develop minimum pressure, replace the pumpRefer to FUEL PUMPInstall fuel pump to carburetor hose and secure with tie strapPrime fuel