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MERCRUISER

Cooling System

➀18-3668D

18-3668

THERMOSTAT KIT

--CONTAINS--

18-3667

Part #

Description

O.E.#

18-1977-1

THERMOSTAT KIT

18-2552

Thermostat Cover Gasket

27-33179-2

THERMOSTAT HOUSING

18-2553

Thermostat Cover Gasket

27-47510

--CONTAINS--

18-2554

Thermostat Cover Gasket

27-41812

Replaces: 47441A1

Part #

Description

O.E.#

18-3551

Thermostat

59137

18-2555

Thermostat Cover Gasket

27-89656-1

Fits 225, GM 260, 228, 898/198,

18-7173

O-Ring

25-30224

185R, 898R, 228R, 2GR

18-3555

Thermostat

99155A1

18-1989

THERMOSTAT HOUSING

18-1994

Replaces: 87290A4, 861006A1

THERMOSTAT HOUSING

Stainless Steel

18-1993

Replaces: 87290A4

THERMOSTAT HOUSING

Use 18-1989K Thermostat Service Kit

Replaces: 78984A01, 861493A3

For: Stainless Steel Version use 18-1989

for replacement parts

18-3531

18-3678

THERMOSTAT HOUSING

18-3530-1

THERMOSTAT HOUSING

Replaces: 861188A1

THERMOSTAT HOUSING

Replaces: 90736A18

Replaces: 860256A4

Fits: MCM/MIE GM V-6 & V-8 305,350,454 & 502 cid

For: GM 370, 425, 454 Mag & 465 V8

engines with closed cooling systems

For: GM V6 and V8 (305 & 350 ci)

18-3532

THERMOSTAT HOUSING AND COVER

18-1910

Replaces: 55131A5

THERMOSTAT HOUSING KIT

18-1989K

Replaces: 861493A3

THERMOSTAT SERVICE KIT

Fits: MCM/MIE GM V6 & V8, 305, 350, 454, and

502cid, engines with closed cooling

Fits: 3.0L GM 181 L/4 (1999-Up)

Service Kit for 18-1989 Thermostat Housing

THERMOSTAT APPLICATION BEGINS ON NEXT PAGE

➀ Items ending in "D" are Display Packaged - Regular number is Non-Display

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