MERCRUISER
Cooling System
18-3555
18-3551
18-3550
18-3549
18-3552
THERMOSTAT
THERMOSTAT
THERMOSTAT
THERMOSTAT
THERMOSTAT
Replaces: 99155A1
Replaces: 59137
Replaces: 59078
Replaces: 14586
Replaces: 76270, 76270T
160°
142°
140°
120°
160°
18-3568
THERMOSTAT KIT
Replaces: 99155T1
Model
Year
Serial #
18-3557
18-3649
5.7MIE
1998-2001
OL002003 & Up
THERMOSTAT
THERMOSTAT
MX6.2LMPI
2000-2001
OL680003 & Up
Replaces: 47594
Replaces: 807252-2
454 Horizon MIE
1998-2001
OL002200 & Up
143°
160°
502 Mag. MPI
1998-2001
OL017000 & Up
➀18-3647D
➀18-3646D
18-3647
18-3646
THERMOSTAT KIT
THERMOSTAT KIT
Replaces: 807252Q5
Replaces: 807252Q3
--CONTAINS--
--CONTAINS--
Part #
Description
O.E.#
18-3644
Part #
Description
O.E.#
18-3649
Thermostat
807252-2
THERMOSTAT KIT
18-3551
Thermostat
59137
18-2844
Thermostat Cover Gasket
27-48818-1
--CONTAINS--
18-2917
Thermostat Housing Gasket
27-53045-1,
18-2552
Thermostat Cover Gasket
27-33179-2
27-33918
Part #
Description
O.E.#
18-2553
Thermostat Cover Gasket
27-47510
18-3649
Thermostat 160°
807252T2
18-2844
Thermostat Cover Gasket
27-48818-1
18-7173
O-Ring
25-30224
18-2553
Thermostat CoverGasket
27-47510
18-2553
Thermostat Cover Gasket
27-47510
18-2917
Thermostat Housing Gasket
27-53045-1,
18-2917
Thermostat CoverGasket
27-53045-1
18-2834
Thermostat Cover Gasket
27-60208
27-33918
➀18-3650D
➀18-3651D
➀18-3648D
18-3651
THERMOSTAT KIT
--CONTAINS--
18-3650
Part #
Description
O.E.#
THERMOSTAT KIT
18-2554
Thermostat Cover Gasket
27-90556
--CONTAINS--
18-2553
Thermostat Cover Gasket
27-47510
18-3648
Part #
Description
O.E.#
18-2834
Thermostat Cover Gasket
27-60208
THERMOSTAT KIT
18-2831
Thermostat Gasket
27-47590-1
18-2844
Thermostat Cover Gasket
27-48818-1
160°
18-3551
Thermostat
59137
18-3550
Thermostat
59078
THERMOSTAT APPLICATION BEGINS ON PAGE 630
➀ Items ending in "D" are Display Packaged - Regular number is Non-Display
628