Description Nm lb‑in. lb‑ft
Hose clamps 3.2 28.3 –
9. Connect the engine exhaust hoses, using two hose clamps at each connection. Tighten the clamps to the specified torque.
Description Nm lb‑in. lb‑ft
Hose clamps 3.2 28.3 –
10. Fill the closed‑cooling system, if equipped, with the recommended antifreeze.
11. Connect both battery cables to the battery, being certain to connect the negative (–) cable last.
12. Upon starting the engine, inspect all exhaust and cooling hose connections for leaks.
Exhaust Manifolds
Exhaust Manifold Removal
!
WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected engine starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing engine or drive components.
1. Disconnect both battery cables from the battery. Be certain to disconnect the negative (–) cable first.
2. If removing the starboard manifold, remove the shift plate and power steering reservoir bracket.
a - Starboard precatalyst O2 sensor
b - Starboard postcatalyst O2 sensor
c - Mounting screws (two shown, one
hidden)
d - Power steering reservoir bracket
3. Drain the engine coolant:
a - Port postcatalyst O2 sensor
b - Port precatalyst O2 sensor
a.
On models with seawater cooling, drain the seawater section of the engine. Refer to Section 1C.
b. On models with closed cooling, drain the coolant until the level is below the exhaust elbow joint area. Refer to
Section 6C ‑ Draining.
c. Note the locations and connections of the hoses for reassembly.
Manifolds and Elbows
Page 7B-10 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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