Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 165Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 165

CARBURETOR
Inspection
1Inspect needle and piston valveReplace if worn or damaged2Measure auto enrichener resistanceReplace if out of specification
Auto Enrichener Resistance 152511 68F (20C) 3Perform piston valve height test belowPiston Valve Height Test: aMeasure piston valve height bConnect to 12 battery cWait several minutes dMeasure piston valve height 4Replace auto enrichener if no change was observeda Piston Valve Height Measurement

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