Mercury 40 FourStroke User Manual

TIMING, SYNCHRONIZING, & ADJUSTING
Page 2C-8 90-857046R1 NOVEMBER 2001
SYNCHRONIZING CARBURETORS
1. With the outboard in water, start engine and allow to warm up. Shift the outboard to
neutral.
2. Connect a tachometer to the engine.
3. Adjust idle RPM screw on bottom carburetor to obtain an idle setting of 1000 RPM in
neutral. If necessary, keep adjusting the idle screw.
NOTE: Keep engine speed set at 1000 RPM in neutral while synchronizing carburetors.
a
a-Idle RPM Screw

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English