Mercury MerCruiser Service Manual page 266

Engine Inspection and Assembly
c. Turn the flywheel in the direction of normal engine rotation and measure flywheel runout at the smooth outer edge of
the flywheel just inside the ring gear.
b
Description
Runout
4. Assemble coupler to the flywheel using six screws and washers, driving them loosely into place.
a
5. Run the heads of the screws down flush with the coupler, but do not tighten any of them at this point. This will allow the
alignment holes to locate the coupler.
Page 3B-64
a
c
© 2016 Mercury Marine
a - Dial indicator
b - Runout measurement
6442
0.203 mm (0.0080 in.) maximum
a - Slotted hole used for alignment
b - Small hole tightly held diameter, used for
alignment
c - This hole is used for manufacturing, not for
assembly
b
57610
90-8M0099748 eng DECEMBER 2015
6.2 Liter (377 cid)