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Sierra Marine Parts Catalog: Mercruiser

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THERMOSTAT APPLICATION (Cont.)
Engine / Model
CID / # CYL
Year
Beginning
Ending
Housing
Thermostat
Thermostat &
Thermostat
Gaskets
Gaskets
Gaskets
Range
Serial #
Serial #
Cover
Gasket Kit
Required
Required - Design II
Required - Design III
5.0L
305/V-8
1988-1995
B774445
F600999
,
18-3668
18-3551
18-7173
18-2552
18-3647
18-3649
18-0398
18-2917
5.0L
305/V-8
1988-1995
B774445
F600999
18-3568
18-3555
18-1508
18-2917
5.0L (GeN +) FWC
305/V-8
1998-2002
L015751
M599999
18-3531  ❻
18-0398
18-2917
5.0L (GeN +) FWC
305/V-8
2002-2010
M600000
& Up
18-3647
18-3649
18-0398
5.0L (GeN +) ALpHA
305/V-8
1998-2002
L015751
M599999
18-3647
18-3649
18-0398
5.0L (GeN +) BrAVo
305/V-8
1998-2002
L015751
M599999
18-3530-1
18-3647
18-3649
18-0398
5.0L (GeN +)
305/V-8
2002-2010
M600000
& Up
18-3568
18-3555
18-1508
5.0L eFI FWC
305/V-8
1998-2001
L012052
M299999
18-3531  ❻
18-3647
18-3649
18-0398
5.0L eFI ALpHA
305/V-8
1998-2001
L012052
M299999
18-3647
18-3649
18-0398
5.0L eFI BrAVo
305/V-8
1998-2001
L012052
M299999
18-3530-1
18-1977-1
18-3646
18-3551
18-2553
18-2844
5.0L MIe FWC
305/V-8
1988
B788152
C396832
, ,
18-3668
18-3551
18-7173
5.0L MIe
305/V-8
1988
B788152
C396832
18-1994  ❶,
18-1977-1
18-3668
18-3551
18-2554
18-2553
5.0L MIe
305/V-8
1988
B788152
C396832
18-3568
18-3555
18-0398
5.0L MpI FWC
305/V-8
2002
M300000
M599999
18-0398
18-2917
5.0L MpI FWC
305/V-8
2002-2010
M600000
& Up
,
18-0398
18-2917
5.0L MpI FWC DTS
305/V-8
2005-2010
W310000
& Up
, ,
18-0398
5.0L MpI FWC eC
305/V-8
2008-2010
A300000
& Up
, ,
18-0398
5.0L MpI FWC eC DTS
305/V-8
2008-2010
A300000
& Up
,
18-3647
18-3649
18-0398
18-2917
5.0L MpI
305/V-8
2002-2010
M300000
& Up
,
18-3647
18-3649
18-0398
5.0L MpI ALpHA
305/V-8
2002
M300000
M599999
18-3530-1 ,
18-3647
18-3649
18-0398
5.0L MpI BrAVo
305/V-8
2002
M300000
M599999
,
18-3647
18-3649
18-0398
5.0L MpI
305/V-8
2002-2010
M600000
& Up
,
18-3647
18-3649
18-0398
5.0L MpI eC
305/V-8
2008-2010
A300000
& Up
18-1977-1
18-3668
18-3551
18-2554
18-2553
18-2917
5.0L LX
305/V-8
1988-1995
B773740
F600999
18-1994  ❶
,
18-3668
18-3551
18-7173
18-2552
305/V-8
1988-1995
B773740
F600999
5.0LX
18-3647
18-3649
18-0398
5.0LX
305/V-8
1988-1995
B773740
F600999
898
305/V-8
1977-1982
4762210
6218461
18-1977-1
18-3646
18-3551
18-2844
18-0398
898
305/V-8
1983-1984
6218462
6899057
18-1994
18-1977-1
18-3668
18-3551
18-2554
18-2553
225 (GM)
327/V-8
1967-1969
2399198
2694014
18-1977-1
18-3651
18-3551
18-2553
18-2844
225 (GM)
327/V-8
1963-1967
1539620
2399197
N.L.A.
18-3551
225 (GM)
2278647
2399197
18-3668
18-3551
18-2552
18-7173
225/225S ForD
3385721
Up
18-3651
18-3551
18-2834
250 MCM/MIe
327/V-8
1968-1969
2314301
2639854
18-1977-1
18-3651
18-3551
18-2553
18-2844
250
350/V-8
1977
4768000
4908849
18-1993
18-1977-1
18-3651
18-3551
18-2844
250 (GM)
4768000
4908849
18-3646
18-3551
18-2844
250 (GM)
4175500
5907057
18-1993
18-3651
18-3649
18-2844
18-2917
255 (GM)
350/V-8
1975-1976
4175500
4767999
18-1977-1
18-3646
18-3551
18-2844
18-0398
255 (GM) MIe
350/V-8
1975-1980
4175500
5907057
18-1977-1
18-3646
18-3551
18-2844
18-0398
255 ForD
3258728
Up
18-3651
18-3551
18-2834
--
255 ForD MCM/MIe
3258728
4178299
18-3646
18-3649
18-2834
--
260
350/V-8
1978-1982
4908850
6218461
18-1977-1
18-3651
18-3551
18-2844
18-0398
260
350/V-8
1982-1987
6218462
B773304
18-1994
18-1977-1
18-3668
18-3551
18-2554
18-2553
18-2917
18-1977-1
18-3646
18-3551
18-2553
18-2844
18-2917
260 MIe FWC
350/V-8
1981-1987
5907058
B788151
18-1977-1
18-3668
18-3551
18-2554
18-2553
18-2917
350/V-8
1981-1987
5907058
B788151
18-1994
260 MIe
18-3668
18-3551
18-2553
18-2554
6218462
B525981
18-1994
260 GM
260 GM
4908850
6218461
18-3646
18-3649
18-2844
18-2917
18-3668
18-3551
18-2553
18-2554
260 GM IB
5907058
B522505
18-3651
18-3551
18-2553
18-2844
260 GM IB
5907058
B522505
260 MIe
5907058
0B522505
18-3646
18-3649
18-2553
18-2844
18-2917
,
18-3668
18-3551
18-2553
18-2554
B522506
B525981
260/5.7L GM IB
➂➄
,
18-3668
18-3551
18-2552
18-7173
260/5.7L GM IB
B522506
B525981
➃➄
,
18-3648
18-3649
18-2552
18-7173
260/5.7L GM IB
B522506
B525981
➃➄
18-3651
18-3551
18-2553
18-2844
260/5.7L GM IB
B522506
B525981
18-3668
18-3551
18-2553
18-2554
260/5.7L GM
B525982
F600999
18-1994
18-2552
18-7173
260/5.7L GM
B525982
F600999
18-3668
18-3551
18-2552
18-7173
260/5.7L GM
B525982
F600999
18-3648
18-3649
260/5.7L GM
0B525982
0F600999
18-3647
18-3649
18-2917
--
260/5.7L MIe
0B522506
0F024999
18-3646
18-3649
18-2553
18-2844
18-2917
350/V-8
1969-1972
2851074
3385720
18-1977-1
18-3646
18-3551
18-2553
18-2844
18-2917
270 MCM/MIe
2851074
3077735
18-3651
18-3551
18-2553
18-2844
270 GM
280 GM
350/V-8
1975-1976
4176250
4770199
18-1977-1
18-3646
18-3649
18-2844
18-0398
280 GM TrS
4176250
4770199
18-1993
18-3651
18-3551
18-2844
300
350/V-8
1985-1986
6668677
B430367
18-1977-1
18-3668
18-3551
18-2554
18-2553
18-2917
320 eFI
350/V-8
1987-1989
A543604
C622418
18-1977-1
18-3646
18-3551
18-2553
18-2844
18-2917
2278747
3780449
18-3646
18-3649
18-2553
18-2844
18-2917
325 GM MCM/MIe
2278747
2313964
18-3668
18-3551
18-2553
--
325 GM
325 GM
2313965
3042730
18-3651
18-3551
18-2553
18-2844
325 GM
3042731
Up
18-3651
18-3551
18-2844
--
330 GM
4623115
Up
18-3651
18-3551
18-2844
--
330 GM MCM/MIe
4623115
0B816540
18-3646
18-3649
18-2553
18-2844
18-2917
18-3668
18-3551
18-2553
18-2554
6083145
Up
330 GM W/BW
18-3651
18-3551
18-2553
18-2844
330 GM W/BW
6083145
Up
,
18-3668
18-3551
18-7173
18-2917
350 MAG ALpHA
350/V-8
1987-1995
B525982
F600999
18-1977-1
18-3668
18-3551
18-2554
18-2553
18-2917
350/V-8
1986-1995
A635178
B525981
350 MAG ALpHA
,
18-3668
18-3551
18-7173
18-2552
18-2917
350/V-8
1987-1995
B525982
F600999
350 MAG ALpHA
18-3647
18-3649
18-0398
350/V-8
1987-1997
B525982
K999999
350 MAG ALpHA
350 MAG ALpHA eFI (GeN +)
350/V-8
1996-1997
F800300
K999999
18-3647
18-3649
18-0398
350 MAG BrAVo MpI
350/V-8
1995-1997
F415189
K999999
18-3530-1
18-3647
18-3649
18-0398
350 MAG eFI SKI
350/V-8
1994-1997
F215561
K999999
18-3530-1
18-3647
18-3649
18-0398
18-3568
18-3555
18-1508
350 MAG MpI FWC
350/V-8
1998-2001
L010019
M299999
18-3531  ❻
18-3647
18-3649
18-0398
350 MAG MpI
350/V-8
1998-2001
L010019
M299999
18-3530-1
18-3568
18-3555
18-0398
350 MAG MpI FWC
350/V-8
2002
M300000
M599999
18-0398
350 MAG MpI FWC
350/V-8
2002-2010
M600000
& Up
,
18-0398
350 MAG MpI FWC DTS
350/V-8
2005-2010
W310000
& Up
, ,
18-0398
350 MAG MpI FWC eC
350/V-8
2008-2010
A300000
& Up
, ,
N/A
18-0398
350 MAG MpI FWC eC DTS
350/V-8
2008-2010
A300000
& Up
350 MAG MpI
350/V-8
2002
M300000
M599999
,
18-3647
18-3649
18-0398
350 MAG MpI ALpHA
350/V-8
2002
M300000
M599999
,
18-3647
18-3649
18-0398
350 MAG MpI BrAVo
350/V-8
2002
M300000
M599999
18-3530-1 ,
18-3647
18-3649
18-0398
350 MAG MpI
350/V-8
2002-2010
M600000
& Up
,
18-3647
18-3649
18-0398
350 MAG MpI
350/V-8
2002-2010
M600000
& Up
,
18-3647
18-3649
18-0398
18-3647
18-3649
18-0398
350 MAG MpI eC
350/V-8
2008-2010
A300000
& Up
,
350 MAG MpI HorIZoN
350/V-8
2002
M300000
M599999
18-3568
18-3555
18-0398
350 MAG MpI HorIZoN
350/V-8
2002-2007
M600000
A299999
18-0398
350 MAG MpI HorIZoN MIe
350/V-8
1999-2001
L304700
M299999
18-3531  ❻
18-3568
18-3555
18-1508
350 MAG MpI HorIZoN MIe
350/V-8
2002
M300000
M316999
18-3568
18-3555
18-1508
350 MAG MpI HorIZoN MIe
350/V-8
2002-2007
M317000
A089999
18-0398
350 MAG MpI MIe FWC
350/V-8
1998-2001
L002008
M299999
18-3531  ❻
18-3568
18-3555
18-1508
350 MpI MIe
350/V-8
1998-2001
L002008
M299999
18-3530-1
18-3647
18-3649
18-0398
350 MAG MpI MIe FWC
350/V-8
2002
M300000
M316999
18-3568
18-3555
18-1508
350 MAG MpI MIe FWC
350/V-8
2002-2007
M317000
A089999
18-0398
Design I
Without check ball
160 degree
7-point drain system
Design II
SN 4167000 & Up
Mechanical Throttle Body
For Stainless Steel version use 18-1989
Design III
Original thermostat housing listed as NLA.
Digital Throttle Body
Aluminum Exhaust Manifold
Emission Control Engine
Order update kit 87290A23
Cast Iron Exhaust Manifold
Manual drain system
Original thermostat housing listed as NLA.
Closed Cooling
Air Actuated drain system
Order update kit 90736A24
Standard Cooling
Complete thermostat housing kit kit
Old Design
With check ball
New Design
Single and 3-point drain system
637