Mercury MerCruiser Service Manual page 499

2. Inspect the O‑ring. The O‑ring must remain in the groove.
b
3. Inspect and clean the mating surfaces on the exhaust pipe.
4. Install the exhaust pipe assembly using the four screws and lockwashers. Tighten the screws to the specified torque.
b
Description
Exhaust Y‑pipe screw
Water Shutter Replacement
IMPORTANT: Exhaust system connections to components other than those supplied by Mercury Marine must use two stainless
steel clamps that are at least 13 mm (½ in.) wide at each joint.
1. Remove and retain the intermediate exhaust pipe from the Y‑pipe.
2. Remove and discard the water shutter and grommets from the Y‑pipe.
3. Install the water shutter into the Y‑pipe. Ensure that the water shutter is seated into the rubber grommets.
b
90-8M0099748 eng DECEMBER 2015
a -
b -
a
32677
a
32680
a - Water shutter
a
b - Rubber grommet
b
18483
Exhaust Pipe and Through-the-Propeller Exhaust
Mating surface
O‑ring
a - Exhaust Y‑pipe screw (4)
b - Exhaust Y‑pipe
© 2016 Mercury Marine
Nm lb‑in.
34 – 25.1
Page 7C-9
lb‑ft