2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 183Get this manual
Quality of the image is intentionally reduced!
TIMING, SYNCHRONIZING,ADJUSTING
aCylinder #4 synchronizing screw (Torx-25)Cylinder #6 synchronizing screw (Torx-25)
90-888465 JUNE 2002
Page 2C-13