Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 116Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 116

TIMING, SYNCHRONIZING,ADJUSTING
3Connect the Carburetor Tu ner to the hose adaptors4Install filters to prevent mercury being drawn into carburetors during an abrupt throttle change5Pinch off enrichener lines between carburetors with tubing clam p
aTubing Clamp (91-804063)Filters (35-18206)Carburetor Tuner (PIN 91-809641 1)