2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 186Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 186

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TIMING, SYNCHRONIZING,ADJUSTING
Cyl#1 Cyl#2 Cyl#4 Cyl#6

CAUTION
Do NOT back throttle stop screw off throttle body lever
Page 2C-16

90-888465 JUNE 2002