Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 71Get this manual
TIMING AND SYNCHRONIZATION
ELECTRICAL
Section 2CTiming and Synchronization
Table of Contents
Specifications 2C-1 Special Tools 2C-2 Ignition Timing 2C-3 TDC Timing Mark Alignment 2C-3 Check Timing 2C-4