MERCRUISER
Cooling System
THERMOSTAT APPLICATION (Cont.)
Engine
Beg.
End.
Thermostat
Model
S/N
S/N
Thermostat
Gaskets
Housing
Kit
230 GM
6218462
B525981
230 MIE
5907058
0B5225505
--
230 GM IB
5907058
B522505
--
➄
230 GM IB
5907058
B522505
--
➅
230/5.0L GM IB
B522506
B525981
--
➂ ➄
230/5.0L GM IB
B522506
B525981
--
➃ ➄
230/5.0L GM IB
B522506
B525981
--
➅
230/5.0L-LX GM
B525982
F600999
➂
230/5.0L-LX GM
B525982
UP
--
➃
230/5.0L GM IB
B522506
B525981
--
➃
230/5.0L-LX GM
B525982
F600999
230/5.0L MIE
0B522506
0B788151
--
230/5.0LX GM
0B525982
0F600999
--
233 FORD
4173000
UP
--
233 FORD MIE
4173000
4902304
--
250 GM
2314301
2639854
--
250 GM
4768000
4908849
250 GM
4768000
4908849
--
250 GM MCM/MIE
2314301
2639854
--
250 GM MCM/MIE
4175500
5907057
--
255 FORD
3258728
UP
--
255 FORD MCM/MIE
3258728
4178299
--
255 GM
4175500
4767999
260 GM
4908850
6218461
--
260 GM
6218462
B525981
260 GM
4908850
6218461
--
260 GM IB
5907058
B522505
--
➄
260 GM IB
5907058
B522505
--
➅
260 MIE
5907058
0B522505
--
260/5.7L GM IB
B522506
B525981
--
➂➄
260/5.7L GM IB
B522506
B525981
--
➃➄
260/5.7L GM IB
B522506
B525981
--
➃ ➄
260/5.7L GM IB
B522506
B525981
--
➅
260/5.7L GM
B525982
F600999
➂
260/5.7L GM
B525982
F600999
--
➃
260/5.7L GM
B525982
F600999
--
➃
260/5.7L GM
0B525982
0F600999
--
260/5.7L MIE
0B522506
0F024999
--
262 MAG ALPHA
0F803800
0K999999
--
262 MAG BRAVO
0F803800
0K999999
--
350 Mag
B525982
F600999
4.3L/LX GM
0F000878
0F601126
--
4.3L/LX/LXH ALPHA
0F601127
0K999999
--
4.3L/LX/LXH BRAVO
0F601127
0K999999
--
4.3L/LH/EFI ALPHA
0L010044
UP
--
4.3L/LH/EFI
0L010044
UP
--
5.0L/EFI ALPHA
0L012052
UP
--
➀ Aluminum Manifold
➃ New Design
➆ 160°
➁ Cast Iron
➄ Std. Cooling
➇ S/N 6229718 & up
➂ Old Design
➅ Closed Cooling
➈ For stainless steel version use 18-1989
635
