Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 140Get this manual

Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 140

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Fuel System Troubleshooting General Information
Problem: Fuel Blow Back Out Of Carburetor
Possible Cause Chipped or broken reeds on reed block Replace reeds Corrective Action