Mercury MERCRUISER Service Manual

Timing Chain and Sprockets
Removal
1. Remove the crankshaft position sensor reluctor wheel.
56X reluctor wheel
a - 56X reluctor wheel
2. Turn the crankshaft to align the timing marks on the crankshaft and camshaft timing sprockets or turn the crankshaft to
cylinder number 1 TDC.
a - Crankshaft sprocket
b - Camshaft sprocket
c - Timing marks
3.
Check the timing chain deflection. Refer to Section 3B ‑ Checking Timing Chain Deflection.
4. Remove the camshaft sprocket.
NOTE: If the sprocket does not come off easily, a light tap on the lower edge of the sprocket with a plastic mallet should
dislodge it.
a
59472
c
59477
a
b
Engine Disassembly
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 3A-31

Mercury MERCRUISER Specifications

General

Brand	Mercury
Model	MERCRUISER
Category	Engine
Language	English