A6

7474474744

COOLING SYSTEMS

SEAWATER COOLING SYSTEMS

6A-0 - SEAWATER COOLING SYSTEMS 90-806535970 1296

Table of ContentsPage

Specifications 6A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . MCM 181 CID / 3.0L 6A-1. . . . . . . . . . . . . . . . . . . MCM 262 CID / 4.3L 6A-2. . . . . . . . . . . . . . . . . . . 350 CID / 5.7L / 454 CID / 7.4L / 502 CID / 8.2L 6A-3. . . . . . . . . . . . . . . . . . . . . . . .

Identification 6A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Seawater Pump With Mechanical Fuel Pump (Inlet Hose On Top) 6A-4. . . . . . . . . . . . . . Seawater Pump Without Mechanical Fuel Pump(Inlet Hose On Bottom) 6A-4. . . . . . . . . . . . . . . . .

Thermostat and Thermostat Housing 6A-4. . . . . . . Two Piece Seawater Pump Assembly 6A-5. . . . One Piece Seawater Pump Assembly 6A-5. . . . Seawater Pump With Mechanical Fuel PumpAssembly 6A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Water Flow Diagrams And Draining Locations 6A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model Without Mechanical Fuel Pump 6A-7. . . . Model With Mechanical Fuel Pump 6A-7. . . . . . MCM 181 CID / 3.0L 6A-8. . . . . . . . . . . . . . . . . . . MCM 262 CID / 4.3L Alpha (Two Piece Manifolds Shown One Piece Similar) 6A-9. . . . MCM 262CID / 4.3L Bravo (Two Piece Manifolds Shown One Piece Similar) 6A-10. . . MCM 350 CID / 5.7L Alpha 6A-11. . . . . . . . . . . . MCM 350 CID / 5.7L Bravo 6A-12. . . . . . . . . . . . MCM and MIE 454 CID / 7.4L / 502 CID /8.2LWith Front Mounted Oil Cooler / Rear MountedPower Steering Cooler or Transmission Cooler /Port Side Fuel Cooler 6A-13. . . . . . . . . . . . . . . . . MIE 5.7L / 350 Magnum EFI and MPI Gen +Tournament Ski (Black Scorpion) 6A-15. . . . . . .

SEAWATER COOLED SYSTEMS - 6A-190-806535970 1296

Specifications

Units of MeasurementsIn. (mm)

Qts. (Litres)

MCM 181 CID / 3.0L

TORQUE SPECIFICATIONS

DESCRIPTION Lb. Ft. N⋅mPower Steering Pump Bracket

Thermostat Cover30 41

Thermostat Housing30 41

Water Circulating Pump

Water Temperature Sender 20 27

Water Temperature Switch

S l

Drain Plugs (See Note 1)

S lPetcocks

SecurelyPulleys

Securely

Hose Clamps

Throttle Lever Nut to Throttle Body Shaft

Note: 1 Coat threads with Quicksilver Perfect Seal before installing.

TOOLS/LUBRICANTS/SEALANTS

DESCRIPTION PART NUMBER

Universal Plate Puller 91-37241

Quicksilver Loctite 8831 92-823089-1

Quicksilver Perfect Seal 92-34227-1

Quicksilver 2-C-4 Marine Lubricant With Teflon 92-825407A3

Quicksilver Special Lubricant 101 92-13872A1

Flush Device 73971A2

Shell Alvania No. 2 Obtain Locally

SPECIFICATIONS

Cooling System Capacity 9 (8.5)

Thermostat (Brass) 140° F(62° C)

6A-2 - SEAWATER COOLING SYSTEMS 90-806535970 1296

MCM 262 CID / 4.3L

TORQUE SPECIFICATIONS

DESCRIPTION Lb. In. Lb. Ft. N⋅mAlternator Brace to Alternator 192 28

Alternator Brace to Block

Alternator to Mounting Bracket

Alternator/Power Steering PumpMounting Bracket

Power Steering Pump Brace toBlock 30 41

Power Steering Pump Bracket

Thermostat Cover

Thermostat Housing

Water Circulating Pump

Water Temperature Sender 20 27

Drain Plugs (See Note)

S lHose Clamps

SecurelyPetcocks

Securely

Pulleys

Note: Coat threads with Quicksilver Perfect Seal before installing.

TOOLS/LUBRICANTS/SEALANTS

DESCRIPTION PART NUMBER

Quicksilver Perfect Seal 92-34227-1

Quicksilver Flushing Attachment 73971A2

Quicksilver Liquid Neoprene 92-25711--2

Loctite Pipe Sealant with TeflonObtain Locally

Marine CaulkingObtain Locally

SPECIFICATIONS

Cooling System Capacity 15(14)

Thermostat (Type) Stainless 160° F (71° C)

SEAWATER COOLED SYSTEMS - 6A-390-806535970 1296

350 CID / 5.7L / 454 CID / 7.4L / 502 CID / 8.2LTORQUE SPECIFICATIONS

DESCRIPTION Lb. In. Lb. Ft. N⋅mAlternator Brace to Alternator 192 28

Alternator to Mounting Bracket

Alternator Mounting Bracket

Power Steering Pump Brace toBlock 30 41Power Steering Pump Bracket

Seawater Pump Brace

Seawater Pump Bracket to Block

Seawater Pump Clamping Screw onCast Bracket

20 17

Seawater Pump Cover 120 14

Thermostat Cover

Thermostat Housing 30 41

Water Circulating Pump

Water Temperature Sender 20 27

Drain Plugs (See Note)

S lHose Clamps

SecurelyPetcocks

Securely

Pulleys

Note: Coat threads with Quicksilver Perfect Seal before installing.

TOOLS/LUBRICANTS/SEALANTS

DESCRIPTION PART NUMBER

Quicksilver Perfect Seal 92-34227-1

Quicksilver Flushing Attachment 73971A2

Universal Puller Plate 91-37241

Quicksilver Loctite Type 8831 92-823089-1

Quicksilver Flushing Attachment 73971A2

Pulley Puller (Kent-Moore) J-25034

Quicksilver Liquid Neoprene 92-25711-2

Quicksilver Special Lubricant 101 92-13872A1

Quicksilver High Performance Gear Lube 92-816026A

Silicone Sealant or Equivalent

Ob i L llShell Alvania No. 2 Grease Obtain Locally

Loctite Pipe Sealant with Teflon

6A-4 - SEAWATER COOLING SYSTEMS 90-806535970 1296

SPECIFICATIONS

Cooling System Capacity 15(14.1)

Thermostat 160° F(71° C)

Identification

Seawater Pump With MechanicalFuel Pump (Inlet Hose On Top)

70346

c

a

b

d

e

a - Fuel Pumpb - Seawater Pumpc - Vent Screwd - Inlet Hosee - Outlet Hose

Seawater Pump Without MechanicalFuel Pump (Inlet Hose On Bottom)

72532bc

d a

e

a - Seawater Pumpb - Bracketc - Pulleyd - Inlet Hosee - Outlet Hose

Thermostat and ThermostatHousing

71758

b

c

d

a

e

a - Housingb - O-Ringc - Thermostat (Stainless Steel Style)d - Spacere - Gasket

SEAWATER COOLED SYSTEMS - 6A-590-806535970 1296

Two Piece Seawater Pump Assembly

72646

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

1 - Screw (5)2 - Washer (5)3 - Cover4 - Gasket5 - Wear Plate (Outer)6 - Gasket7 - Plug8 - Impeller9 - Body10- Gasket11- Wear Plate (Inner)12- O-Ring or Quad Ring13- Oil Seal14- Housing15- Ball Bearing16- Shaft17- Ball Bearing18- Snap Ring19- Oil Seal20- Hub

One Piece Seawater Pump Assembly

74577

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1 - Screw (5)2 - Washer (5)3 - One Piece Body4 - Quad Ring5 - Impeller6 - Wear Plate7 - Oil Seal8 - Housing9 - Ball Bearing10- Shaft11- Ball Bearing12- Snap Ring13- Oil Seal14- Hub

6A-6 - SEAWATER COOLING SYSTEMS 90-806535970 1296

Seawater Pump With MechanicalFuel Pump Assembly

1

23

4

5

6

7

8

9

10

11

1213

1415

16

17

18

19

20

21

22

23

24

26

25

1 - Screw2 - Washer3 - Cover4 - Gasket5 - Outer Wear Plate6 - Gasket7 - Plug8 - Impeller9 - Body10- Gasket11- Inner Wear Plate12- Quad Ring13- Oil Seal14- Oil Seal15- Housing Assembly16- Lockwasher17- Nut18- Bearing19- Shaft Assembly20- Slip Ring21- Baring22- Retainer Ring23- Oil Seal24- Pulley25- Lockwasher26- Screw (Magnetic)

SEAWATER COOLED SYSTEMS - 6A-790-806535970 1296

Water Flow Diagrams And Draining LocationsNOTE: The cubic inch / litre designations listed in the Water Flow Diagrams and Draining Locations refer to en-gine size only, not to the model designation.

IMPORTANT: After cooling system has been drained completely, install and tighten securely all drainplugs. Reconnect all hoses and tighten all hose clamps securely.

! CAUTIONThe seawater pumps shown below have different seawater inlet hose locations. During the procedure,ensure that the seawater inlet hose is installed in the same location. Failure to properly connect thehoses could result in serious engine damage.

Model Without Mechanical FuelPump Mounted On Seawater Pump

72532

a

a - Seawater Inlet Hose

Model With Mechanical Fuel PumpMounted On Seawater Pump

70346

a

a - Seawater Inlet Hose

6A-8 - SEAWATER COOLING SYSTEMS 90-806535970 1296

MCM 181 CID / 3.0L

a

a

b

c

c

b

50745

a - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)

SEAWATER COOLED SYSTEMS - 6A-990-806535970 1296

MCM 262 CID / 4.3L Alpha (Two Piece Manifolds Shown, One Piece Similar)

a

b

b

c

c

74816

NOTE 1

d

NOTE 1: Fuel cooler shown for Fuel Injection Modelsa - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

6A-10 - SEAWATER COOLING SYSTEMS 90-806535970 1296

MCM 262CID / 4.3L Bravo (Two Piece Manifolds Shown One Piece Similar)

a

b

b

c

c

74818

a

NOTE 1

d

NOTE 1: Fuel cooler shown for Fuel Injection Modelsa - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

SEAWATER COOLED SYSTEMS - 6A-1190-806535970 1296

MCM 350 CID / 5.7L Alpha

74491

a

b

b

c

c

NOTE 1

d

NOTE 1: Fuel cooler shown for Fuel Injection Modelsa - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

6A-12 - SEAWATER COOLING SYSTEMS 90-806535970 1296

MCM 350 CID / 5.7L Bravo

74071

c

c

a

b

a

b

NOTE 1

d

NOTE 1: Fuel cooler shown for Fuel Injection Modelsa - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

SEAWATER COOLED SYSTEMS - 6A-1390-806535970 1296

MCM and MIE 454 CID / 7.4L / 502 CID /8.2L With Front Mounted Oil Cooler /Rear Mounted Power Steering Cooler or Transmission Cooler / Port Side FuelCooler

74744

b

b

a

c

c

a

NOTE 1

d

NOTE 1: Fuel cooler shown for Fuel Injection Modelsa - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

6A-14 - SEAWATER COOLING SYSTEMS 90-806535970 1296

MIE 5.7L / 350 Magnum EFI and MPI Gen + Tournament Ski (Black Scorpion)

a

a

b

b

c

c

74857

NOTE 1

d

a - Remove Hoses (Lift, Lower or Bend To Completely Drain).b - Remove Block Plugs (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire System Is Drained).c - Remove Drain Plugs From Exhaust Exhaust Manifold Drain Elbows (Repeatedly Clean Out Holes Using A Stiff Wire Until Entire

System Is Drained)d - Drain Plug In Cooler

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SEAWATER COOLED SYSTEMS - 6A-1590-806535970 1296

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6A-16 - SEAWATER COOLING SYSTEMS 90-806535970 1296