Timing Chain And Sprockets; Removal - Mercury MerCruiser Service Manual

Timing Chain and Sprockets

Removal

1. Remove the crankshaft position sensor reluctor wheel.
a
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.
b
a
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.
90-8M0099748 eng DECEMBER 2015
56X reluctor wheel
a - 56X reluctor wheel
59472
a -
b -
c -
c
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© 2016 Mercury Marine
Engine Disassembly
Crankshaft sprocket
Camshaft sprocket
Timing marks
Page 3A-31