2001 Mercury Mariner 50-60HP Factory Service Manual, Page 132Get this manual

2001 Mercury Mariner 50-60HP Factory Service Manual, Page 132

TIMING, SYNCHRONIZING,ADJUSTING
SYNCHRONIZING CARBURETORS 1With the outboard in water, start engine and allow to warm upShift the outboard to neutral2Connect tachometer to the engine3Adjust idle RPM screw (a) on bottom carburetor to obtain an idle setting of 1000 RPM in neutralIf necessary, keep adjusting the idle screw

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