Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 159Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 159

CARBURETOR
Idle Speed
NOTE: Outboard should be completely warmed up for the idle speed adjustment1With the outboard in forward gear adjust idle speed screw to obtain the specified idle speed

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