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MerCruiser 5.7 MPI - Air-Actuated Single-Point Drain System; Boat in the Water; Multi-Point Drain (MPD) System

MerCruiser 5.7 MPI
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Section 6 - Storage
Page 78 90-864197072 NOVEMBER 2007
MULTI-POINT DRAIN (MPD) SYSTEM
10226
M110050
93235672
b
a
a
b
6129
a - Side of cylinder block b - Bottom of exhaust manifolds
a
b
6130
a - Water circulating pump hose b - Fuel cooler to thermostat housing
a
6131
a - Check valve (if equipped)
Air‑Actuated Single‑Point Drain System
BOAT IN THE WATER
NOTE: This procedure is written for the air pump that is attached to the engine. However,
any air source can be used.
1. Close the seacock (if equipped) or remove and plug the water inlet hose.
2. Remove the air pump from the engine.
3. Ensure that the lever on top of the pump is flush with the handle (horizontal).
4. Install the air pump on the actuator fitting.

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