MAINTENANCE SERVICE MANUAL NUMBER 23
Page 1B-28 90-861326--1 MARCH 1999
Flushing System MIE (Inboard) 454 Mag MPI Horizon
EARLY MODEL FLUSHING SYSTEM
NOTE: This system has a black hose connecting the hose fitting to the flush valve.
CAUTION
Do NOT start engine at any point in this procedure. If boat is in the water, starting
engine during this procedure will pull in seawater. If boat is out of the water, starting
engine may damage the seawater pump.
NOTE: Do not use this method on boats equipped with waterlift exhaust collectors or
mufflers.
1. Remove blue cap from flush socket.
75423
a
b
a-Cap
b-Flush socket
2. Attach hose to the flush socket.
75637
a
b
c
a-Water Hose
b-Flush Socket
c-Flush Valve
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