Mercury MerCruiser MCM 454 Mag MPI Service Manual page 74

SERVICE MANUAL NUMBER 23
7. Insert a small wire (repeatedly) to make sure that speedometer pitot tube, trim tab cavity
8. Crank engine over slightly with starter motor to purge any water trapped in seawater
9. After seawater section of cooling system has been drained completely, coat threads of
Index Index
90-861326--1 MARCH 1999
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vent hole, and trim tab cavity drain passage are unobstructed and drained.
Typical Bravo Drive Unit
a - Speedometer Pitot Tube
b - Anode Cavity Vent Hole
c - Anode Cavity Drain Passage
pickup pump. DO NOT ALLOW ENGINE TO START.
drain plugs with Quicksilver Perfect Seal. Install all drain plugs and tighten securely.
Reconnect all hoses and tighten all hose clamps securely.
b
c
a
MAINTENANCE
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