Sierra Marine Parts Catalog
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THERMOSTAT HOUSING
Replaces: 87290A4
For: Stainless Steel Version use 18-1989
THERMOSTAT HOUSING
Replaces: 861188A1
Fits: MCM/MIE GM V-6 & V-8 305,350,454 & 502 cid
engines with closed cooling systems
THERMOSTAT HOUSING
Replaces: 78984A01, 861493A3
THERMOSTAT HOUSING
Replaces: 87290A4, 861006A1
Stainless Steel
Use 18-1989K Thermostat Service Kit
for replacement parts
THERMOSTAT HOUSING
Replaces: 860256A4
For: GM V6 and V8 (305 & 350 ci)
THERMOSTAT HOUSING KIT
Replaces: 861493A07
Fits: 3.0L GM 1999-Up, S/N 0L340999-Lower
THERMOSTAT HOUSING AND COVER
Replaces: 55131A5
Fits: MCM/MIE GM V6 & V8, 305, 350, 454, and
502cid, engines with closed cooling
THERMOSTAT SERVICE KIT
Service Kit for 18-1989 Thermostat Housing
ROVER
3140000
UP
—
—
60
68/L4
1965-1968
1887079
2049044
80
80/L4
1966-1969
2049045
2851423
90
96/L4
1970-1972
2851424
3226957
100 VASER
98/L4
2007-2010
w995000
& UP
18-1508
110
153/L4
1963-1966
1537370
2044033
❹
110
153/L4
1963-1966
1821720
2044033
❺
120
153/L4
1964-1972
1666601
3377340
❹
120
153/L4
1964-1966
1725593
2046624
❺
120
153/L4
1967
2046625
2324346
❺
120
153/L4
1968-1972
2324347
3377340
❺
,
➂
120
153/L4
1972-1986
3377341
B531853
➂
2.5L
153/L4
1987-1989
B531854
C853255
➂
140
181/L4
1968-1986
2508261
B450800
➂
140 (6 CYL)
1538930
1725960
—
—
3.0L
181/L4
1987-1989
B450801
C856558
➂
3.0L, FWC
181/L4
1990-2010
C856559
UP
❻
3.0L
181/L4
1990-1994
C856559
F603999
❼
,
➂
3.0L
181/L4
2000-2010
L341000
& UP
❼
3.0L
181/L4
1998-2000
L010042
L340999
❼
,
➂
3.0L MPI
181/L4
2008-2010
A072812
& UP
3.0L MPI FWC
181/L4
2008-2010
A072812
& UP
❻
3.0LX, FWC
181/L4
1990-1997
C856559
K999999
❻
3.0LX
181/L4
1990-1997
C856559
K999999
❼
,
➂
150
1666495
2048046
—
—
160
➀
2048022
2770031
—
—
160
➀
2048022
2233574
—
—
160
➀
2326069
2770031
—
165
2770032
5813433
—
165
224/L4
1987
B434941
B774251
165
6916779
UP
—
Engine / Model
CID / # CYL
Year
Beginning
Ending
Housing
Thermostat
Thermostat &
Thermostat
Gaskets
Gaskets
Gaskets
Range
Serial #
Serial #
Cover
Gasket Kit
Required
Required - Design I
Required - Design I I
THERMOSTAT APPLICATION
I/O—MERCRUISER-CoolingSystem
❶
Design I
❷
Design II
❸
Design III
❹
Aluminum Exhaust Manifold
❺
Cast Iron Exhaust Manifold
❻
Closed Cooling
❼
Standard Cooling
❽
With check ball
❾
Without check ball
❿
SN 4167000 & Up
➀
Original thermostat housing listed as NLA.
Order update kit 87290A23
➁
Original thermostat housing listed as NLA.
Order update kit 90736A24
➂
Complete thermostat housing kit kit
➃
Single and 3-point drain system
➄
7-point drain system
➅
Mechanical Throttle Body
➆
Digital Throttle Body
➇
Emission Control Engine
➈
Manual drain system
➉
Air Actuated drain system
☞
Old Design
♠
New Design
♣
160 degree
♥
For Stainless Steel version use 18-1989