MAINTENANCE
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 1B-57
7. Insert a small wire (repeatedly) to make sure that speedometer pitot tube, trim tab cavity
vent hole, and trim tab cavity drain passage are unobstructed and drained.
71217
b
c
a
Typical Bravo Drive Unit
a-Speedometer Pitot Tube
b-Anode Cavity Vent Hole
c-Anode Cavity Drain Passage
8. Crank engine over slightly with starter motor to purge any water trapped in seawater
pickup pump. DO NOT ALLOW ENGINE TO START.
9. After seawater section of cooling system has been drained completely, coat threads of
drain plugs with Quicksilver Perfect Seal. Install all drain plugs and tighten securely.
Reconnect all hoses and tighten all hose clamps securely.
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