1997
Model MCM and MIE Engines
3. The heater supply hose can then be connected
to the fitting at the aft side of the intake manifold.
Installation
a
a
Refer to the illustrations on the following pages for
specific supply and return hose connection points.
MCM 7.4LX EFI, AND MIE 7.4L EFI ENGINES
b
IMPORTANT: When connecting a cabin heater or
hot water heater on these engines, the following
additional requirements must be met:
•
DO NOT install any valves, or similar devices,
which could restrict or stop the flow of supply
and return coolant from a cabin heater and/or
hot water heater.
75045
•
DO NOT install T-fittings, or similar devices, in
the existing intake manifold-to-engine water
circulating pump hose. This hose must be re-
moved and discarded.
a - Hose Connector
b - Connect Supply Hose Here
4. If engine is equipped with a fitting at the circu-
lating pump that is smaller than 5/8 in. (16
mm) I.D., remove the fitting and apply Quicksil-
ver Perfect Seal to threads and install return hose
connector from kit, as follows:
!
CAUTION
Avoid a performance loss and/or possible engine
damage. Engine coolant must flow continuously
from the engine intake manifold to the engine wa-
ter circulating pump. NEVER close-off or block
the coolant flow to or from a heater.
a. Remove the plug from circulating pump.
b. Install reducer bushing into circulating pump.
c. Install 90 degree fitting into reducer bushing.
d. Install hose connector into 90 degree fitting.
All heater installations must be plumbed in se-
ries with the supply and return connections.
1.
Remove and discard the existing hose that is
connected from the fitting at the aft side of the in-
take manifold to the water circulating pump.
2.
If engine is equipped with a fitting that is
smaller than 5/8 in. (16 mm) I.D., remove the fit-
ting and apply Quicksilver Perfect Seal to threads
and install fitting from kit.
Index
90-823324--2 796
SEAWATER COOLED SYSTEMS - 6A-49
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
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This book is invaluable if you do your own repairs. Great book.
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