Mercury 40 FourStroke User Manual

TIMING, SYNCHRONIZING, & ADJUSTING
90-857046R1 NOVEMBER 2001 Page 2C-5
2. Place the outboard in “Forward” gear and check timing at idle “Retarded.” (If not within
specification window, refer to Diagnostic Test Procedures Section 2A.)
a
a
10° ATDC
a-Timing Mark (Full Retarded)
3. Slowly increase the engine RPM while watching the ignition timing marks. The timing
should increase to the maximum timing specification “Full Advance” at approximately
6000 RPM. (If not within specification window, refer to Diagnostic Test Procedures Sec-
tion 2A.)
a
a
28° BTDC
a-Timing Mark (Full Advance)

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English