6. Install the camshaft sprocket and timing chain. Tighten the sprocket screws to the specified torque.
a - Crankshaft sprocket
b - Camshaft sprocket
c - Timing marks
Description Nm lb‑in. lb‑ft
Camshaft sprocket screws 25 – 18.4
Checking Timing Chain Deflection
1. Rotate the camshaft (in either direction) to place tension on one side of the chain.
2. Establish and mark a reference point on the block (on taut side of chain) and measure from this point to the chain.
Measuring timing chain deflection
3. Rotate the camshaft in the opposite direction to provide slack in the chain.
4. Push the chain in toward the sprockets and measure the distance between the reference point and timing chain.
5. The deflection is the difference between these two measurements. If the deflection exceeds specification, the timing chain
should be replaced.
Description
6.2 Liter
Chain deflection 11 mm (0.4331 in.) maximum
Engine Inspection and Assembly
Page 3B-36 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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