Boating Solutions Mercruiser Sterndrive Thermostats Oil Sending Unit Parts Guide

 

Mercruiser Thermostat Application

Engine Model Beg. Ser. End. Ser. Thermostat Cover Gaskets Housing Thermostat Kit
ROVER 3140000 UP 18-3551 � � � �
60 1887079 2049044 18-3551 � � � �
80 2049045 2851423 18-3551 � � � �
90 2851424 3226957 18-3557 � 18-2831 � �
110 1537370 2044033 18-3551 � � � �
120 (1) 1666601 3377340 18-3551 � � � �
120 (2) 1725593 2324346 18-3551 � � � �
120/2.5L (2) 2324347 UP 18-3550 18-1969 18-2831 18-1968 18-3650
140 (6 CYL) 1538930 1725960 18-3551 � � � �
140 (4 CYL)/3.0L 2508261 UP 18-3550 18-1969 18-2831 18-1968 18-3650 (8)
3.0L/3.0LX C856559 UP 18-3550 18-1969 18-2831 18-1968 18-3650
150 1666495 2048046 18-3551 � � � �
160 (1) 2048022 2770031 18-3551 � � � �
160 (2) 2048022 2233574 18-3557 � � � �
160 (2) 2326069 2770031 18-3557 � 18-2831 � �
165 2770032 5813433 18-3550 18-1969 18-2831 18-1968 18-3650
165/3.7L (4 CYL) 6916779 UP 18-3555 � 18-2555 � 18-3667
170 (4 CYL) 6916779 UP 18-3555 � 18-2555 � 18-3667
175/4.3L, 4.3LX (262 CID) (3) B527955 UP 18-3551 � 18-2554 � 18-3668
175/4.3L, 4.3 LX (262 CID)(4) B527955 UP 18-3551 � 18-7173 � 18-3668
175/4.3L, 4.3 LX (262 CID)(4) F001220 UP 18-3649 (7) � 18-7173 � 18-3648
180/3.7L-LX (4 CYL) 6916779 UP 18-3555 � 18-2555 � 18-3667
185 (229 CID) 6330183 6919655 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
185 (262 CID) A331455 B527954 18-3551 � 18-2554 18-1994 (9) 18-3668
190 1564539 1730903 18-3551 � � � �
190 (4 CYL) 6916779 UP 18-3555 � 18-2555 � 18-3667
200 2453769 2712072 18-3557 � 18-2831 � �
200 GM 6218462 B525981 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
200/5.0L 0B525982 0F600999 18-3649 � 18-2917 � 18-3647
200/5.0L GM(3) B525982 UP 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
200/5.0L GM (4) B525982 UP 18-3649 (7) � 18-7173 18-1994 (9) 18-3648
205 (262 CID) A331455 B527954 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
205/4.3L, 4.3LX (262 CID)(3) B527955 D714369 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
205/4.3L, 4.3 LX (262 CID)(4) B527955 D714369 18-3551 � 18-2552, 18-7173 � 18-3668
205/4.3L, 4.3 LX (262 CID)(4) F001220 UP 18-3649 (7) � 18-7173 � 18-3648
215 FORD 2781153 3040410 18-3551 � � � �
215 FORD 3040411 UP 18-3551 � 18-2834 � 18-3651
215 FORD MCM/MIE 3040411 3385720 18-3649 � 18-2834 � 18-3646
225 FORD MCM/MIE 3385721 4176999 18-3649 � 18-2834 � 18-3646
225 GM 1539620 2278646 18-3551 � � � �
225 GM 2278647 2399197 18-3551 � 18-7173 � 18-3668
225 GM 2399198 2694014 18-3551 � 18-2553, 18-2844 � 18-3651
225/225S FORD 3385721 UP 18-3551 � 18-2834 � 18-3651
228 GM MCM/MIE 4765100 6218461 18-3649 � 18-2844, 18-2917 � 18-3646
228 GM 4765100 6218461 18-3551 � 18-2844 18-1993 18-3651
228 GM 6218462 B525981 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
230 GM 6218462 B525981 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
230 MIE 5907058 0B5225505 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
230 GM IB(5) 5907058 B522505 18-3551 � 18-2553, 18-2554 � 18-3668
230 GM IB(6) 5907058 B522505 18-3551 � 18-2553, 18-2844 � 18-3651
230/5.0L GM IB(3)(5) B522506 B525981 18-3551 � 18-2553, 18-2554 � 18-3668
230/5.0L GM IB(4)(5) B522506 B525981 18-3649 (7) � 18-7173 � 18-3648
230/5.0L GM IB(6) B522506 B525981 18-3551 � 18-2553, 18-2844 � 18-3651
230/5.0L-LX GM(3) B525982 F600999 18-3551 � 18-2554 18-1994 (9) 18-3668
230/5.0L-LX GM(4) B525982 UP 18-3551 � 18-2552, 18-7173 � 18-3668
230/5.0L GM IB(4) B522506 B525981 18-3649 (7) � 18-2552, 18-7173 � 18-3648
230/5.0L-LX GM B525982 F600999 18-3649 (7) � 18-2552, 18-7173 18-1994 (9) 18-3648
230/5.0L MIE 0B522506 0B788151 18-3649 � 18-2844 18-2917 � 18-3646
230/5.0LX GM 0B525982 0F600999 18-3649 � 18-2917 � 18-3647
233 FORD 4173000 UP 18-3551 � 18-2834 � 18-3651
233 FORD MIE 4173000 4902304 18-3649 � 18-2834 � 18-3646
233 FORD MIE 4173000 4902304 18-3649 � 18-2834 � 18-3646
250 GM 2314301 2639854 18-3551 � 18-2553, 18-2844 � 18-3651
250 GM 4768000 4908849 18-3551 � 18-2844 18-1993 18-3651
250 GM 4768000 4908849 18-3649 � 18-2844, 18-2917 � 18-3646
250 GM MCM/MIE 2314301 2639854 18-3649 � 18-2844 18-2917 � 18-3646
250 GM MCM/MIE 4175500 5907057 18-3649 � 18-2844, 18-2917 � 18-3646
255 FORD 3258728 UP 18-3551 � 18-2834 � 18-3651
255 FORD MCM/MIE 3258728 4178299 18-3649 � 18-2834 � 18-3646
255 GM 4175500 4767999 18-3551 � 18-2844 18-1993 18-3651
260 GM 4908850 6218461 18-3551 � 18-2844 � 18-3651
260 GM 6218462 B525981 18-3551 � 18-2554 18-1994 (9) 18-3668
260 GM 4908850 6218461 18-3649 � 18-2917 � 18-3646
260 GM IB(5) 5907058 B522505 18-3551 � 18-2553, 18-2554 � 18-3668
260 GM IB(6) 5907058 B522505 18-3551 � 18-2553, 18-2844 � 18-3651
260 MIE 5907058 0B522505 18-3649 � 18-2844 18-2917 � 18-3646
260/5.7L GM IB(3)(5) B522506 B525981 18-3551 � 18-2553, 18-2554 � 18-3668
260/5.7L GM IB(4)(5) B522506 B525981 18-3551 � 18-7173 � 18-3668
260/5.7L GM IB(4)(5) B522506 B525981 18-3649 (7) � 18-2552, 18-7173 � 18-3648
260/5.7L GM IB(6) B522506 B525981 18-3551 � 18-2844 � 18-3651
260/5.7L GM(3) B525982 F600999 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
260/5.7L GM(4) B525982 F600999 18-3551 � 18-2552, 18-7173 � 18-3668
260/5.7L GM(4) B525982 F600999 18-3649 (7) � 18-7173 � 18-3648
260/5.7L GM 0B525982 0F600999 18-3649 � 18-2917 � 18-3647
260/5.7L MIE 0B522506 0F024999 18-3649 � 18-2844 18-2917 � 18-3646
262 MAG ALPHA 0F803800 0K999999 18-3649 � 18-2917 � 18-3647
262 MAG BRAVO 0F803800 0K999999 18-3649 � 18-2917 � 18-3647
350 Mag B525982 F600999 18-3551 � 18-7173 18-1994 (9) 18-3668
4.3L/LX GM 0F000878 0F601126 18-3649 � 18-2917 � 18-3647
4.3L/LX/LXH ALPHA 0F601127 0K999999 18-3649 � 18-2917 � 18-3647
4.3L/LX/LXH BRAVO 0F601127 0K999999 18-3649 � 18-2917 � 18-3647
4.3L/LH/EFI ALPHA 0L010044 AND UP 18-3649 � 18-2917 � 18-3647
4.3L/LH/EFI 0L010044 AND UP 18-3649 � 18-2917 � 18-3647
5.0L/EFI ALPHA 0L012052 AND UP 18-3649 � 18-2917 � 18-3647
5.0L/EFI BRAVO 0L012052 AND UP 18-3649 � 18-2917 � 18-3647
5.7 GM ALPHA 0F225560 0K999999 18-3649 � 18-2917 � 18-3647
5.7 GM BRAVO 0F225560 0K999999 18-3649 � 18-2917 � 18-3647
5.7L/EFI GM ALPHA 0L010037 UP 18-3649 � 18-2917 � 18-3647
5.7L/EFI GM BRAVO 0L010037 UP 18-3649 � 18-2917 � 18-3647
5.7 GM (SKI) A338553 B514626 18-3551 � 18-2553, 18-2554 18-1994 (9) 18-3668
5.7L SKI 0B514627 UP 18-3649 � 18-2917 � 18-3647
5.7 GM SKI/BRAVO(3) B514627 UP 18-3551 � 18-2553 18-2554 � 18-3668
5.7 GM SKI/BRAVO(4) B514627 UP 18-3551 � 18-7173 � 18-3668
5.7 GM SKI/BRAVO(4) B514627 UP 18-3649 (7) � 18-7173 � 18-3648
5.7L MIE 0F025000 0F622099 18-3649 � 18-2844 � 18-3647
5.7L MIE 0F622100 0K999999 18-3649 � 18-2917 � 18-3647
5.7L MIE 0F622100 0K999999 18-3649 � 18-2844 � 18-3647
5.7L MIE 0L002003 UP 18-3649 � 18-2917 � 18-3647
270 GM 2851074 3077735 18-3551 � 18-2553 18-2844 � 18-3651
270 GM MCM/MIE 2851074 3385720 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
280 GM 4176250 4770199 18-3649 � 18-2844 18-2917 � 18-3646
280 GM TRS 4176250 4770199 18-3551 � 18-2844 18-1993 18-3651
300 MR/TRS GM 6668677 B430367 18-3551 � 18-2554 18-1994 (9) 18-3668
320 GM EFI A543604 UP 18-3551 � 18-2553, 18-2844 � 18-3651
320 GM 0A543604 0C622418 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
325 GM MCM/MIE 2278747 3780449 18-3649 � 18-2553, 18-2844 18-2917 � 18-3646
325 GM 2278747 2313964 18-3551 � 18-2553 � 18-3668
325 GM 2313965 3042730 18-3551 � 18-2553, 18-2844 � 18-3651
325 GM 3042731 UP 18-3551 � 18-2844 � 18-3651
330 GM 4623115 UP 18-3551 � 18-2844 � 18-3651
330 GM MCM/MIE 4623115 0B816540 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
330 GM W/BW(5) 6083145 UP 18-3551 � 18-2553, 18-2554 � 18-3668
330 GM W/BW(6) 6083145 UP 18-3551 � 18-2553, 18-2844 � 18-3651
340/7.4L GM IB(3)(5) 5889914 UP 18-3551 � 18-2553, 18-2554 � 18-3668
340/7.4L GM IB(4)(5) 5889914 UP 18-3551 � 18-7173 � 18-3668
340/7.4L GM IB(6) 5889914 UP 18-3551 � 18-2553, 18-2844 � 18-3651
340/7.4L MIE 5889914 0D715493 18-3649 � 18-2553, 18-2917 � 18-3646
350 MAG 0B252882 0K999999 18-3649 � 18-2917 � 18-3647
350 MAG 0B252882 0K999999 18-3649 � 18-2917 � 18-3647
350 MAG SKI 0D505450 0K999999 18-3649 � 18-2917 � 18-3647
350 MAG EFI SKI 0F215561 0K999999 18-3649 � 18-2917 � 18-3647
350 MAG MPI/MIE 0L010019 UP 18-3649 � 18-2917 � 18-3647
350 MAG MPI SKI 0F350583 UP 18-3649 � 18-2917 � 18-3647
SCORPION SKI 0F800000 UP 18-3649 � 18-2917 � 18-3647
7.4 BRAVO GM(3) B771113 D603117 18-3551 � 18-2553 18-2554 � 18-3668
7.4 BRAVO GM(4) B771113 UP 18-3551 � 18-2552, 18-7173 � 18-3668
7.4 BRAVO GM(4) D603118 UP 18-3649 (7) � 18-2552, 18-7173 � 18-3648
7.4L W/HURTH IB(5) C391564 D715493 18-3551 � 18-7173 � 18-3668
7.4L W/HURTH IB(6) C391564 UP 18-3551 � 18-2553, 18-2844 � 18-3651
7.4L W/HURTH IB D715494 UP 18-3649 (7) � 18-2844 � 18-3648
7.4L/LX GM 0F352000 0K999999 18-3649 � 18-2917 � 18-3647
7.4L MPI/TBI 0F563052 UP 18-3649 � 18-2917 � 18-3647
7.4L MIE 0C391564 0D715493 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
7.4L MIE 0C391564 0F349999 18-3649 � 18-2553, 18-2917 � 18-3646
7.4L MIE 0D715494 0F820141 18-3649 � 18-2553 18-2844, 18-2917 � 18-3646
7.4L MIE 0F820142 0K999999 18-3649 � 18-2917 � 18-3647
7.4L MIE 0F820142 0K999999 18-3649 � 18-2844, 18-2917 � 18-3647
350 GM 3780450 UP 18-3551 � 18-2844 � 18-3651
350 GM (MAGNUM) A635178 B525981 18-3551 � 18-2554 � 18-3668
350 GM (MAGNUM)(3) B525982 UP 18-3551 � 18-2553, 18-2554 � 18-3668
350 GM (MAGNUM)(4) B525982 UP 18-3551 � 18-7173 � 18-3668
350 GM (MAGNUM)(4) B525982 UP 18-3649 (7) � 18-2552, 18-7173 � 18-3648
350 MIE 3780450 4623109 18-3649 � 18-2917 � 18-3646
370 GM 4179554 6721527 18-3649 � 18-2553 18-2844, 18-2917 � 18-3646
370 TRS GM 4179554 6721527 18-3551 � 18-2553, 18-2844 � 18-3651
370 TRS GM 6721528 UP 18-3551 � 18-2553, 18-2554 � 18-3668
390 GM 2781129 2825059 18-3551 � 18-2553 18-2844 � 18-3651
390 GM MCM/MIE 2781129 3042731 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
400 GM 4179554 0B457644 18-3649 � 18-2553, 18-2917 � 18-3646
400 TRS GM 4179554 UP 18-3551 � 18-2553, 18-2844 � 18-3651
420 GM A398941 UP 18-3551 � 18-2553 18-2844 � 18-3651
420 GM 0A398941 0B622418 18-3649 � 18-2553, 18-2844, 18-2917 � 18-3646
440 TRS GM 4179554 UP 18-3551 � 18-2553, 18-2844 � 18-3651
454 GM MAGNUM/ALPHA(3) A631894 B785148 18-3551 � 18-2554 � 18-3668
454 GM MAGNUM/BRAVO(4) A631894 UP 18-3551 � 18-2552, 18-7173 � 18-3668
454 GM MAGNUM/BRAVO(4) B721206 UP 18-3649 (7) � 18-2552, 18-7173 � 18-3648
454 MAG MCM/SKI 0F305000 0K999999 18-3649 � 18-2917 � 18-3647
460 TRS GM 4179554 UP 18-3551 � 18-2553, 18-2844 � 18-3651
470 4208730 6218036 18-3552 � 18-2843 � 18-3652
470 6218037 UP 18-3555 � 18-2555 � 18-3667
485 5685394 UP 18-3552 � 18-2555 � 18-3652
488 6170297 UP 18-3555 � 18-2555 � 18-3667
500(Gen V) F213293 F615766 18-3551 � 18-2844 18-1994 (9) 18-3651
502 EFI/MPI MCM 0F8026000 0K999999 18-3649 � 18-2917 � 18-3647
502 MAG MPI 0L017000 UP 18-3649 � 18-2917 � 18-3647
575 GM 0A677429 0D763716 18-3649 � 18-2553, 18-2844, 18-2914 � 18-3646
575 A677429 UP 18-3551 � 18-2553 18-2844 � 18-3651
8.2L MIE 0D857200 0F350274 18-3649 � 18-2917 � 18-3647
8.2L MIE 0F350275 0F819619 18-3649 � 18-2917 � 18-3647
8.2L MIE 0D857200 0F819619 18-3649 � 18-2917 � 18-3647
8.2L MPI/MIE 0F819620 UP 18-3649 � 18-2917 � 18-3647
888 FORD 3108723 UP 18-3551 � 18-2834 � 18-3651
888 FORD MCM 3108723 4887829 18-3649 � 18-2834 � 18-3646
898/198 GM 4762210 6218461 18-3551 � 18-2844 � 18-3651
898/198 GM MCM/MIE 4762210 6218461 18-3649 � 18-2917 � 18-3646
898 GM 6218462 UP 18-3551 � 18-2554 � 18-3668

(1) Aluminum manifold (2) Cast Iron (3) Old design (4) New design (5) Std. cooling

(6) Closed cooling (7) 160 degree (8) S/N 6229718 & Up (9) For SS version use AP 5040

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Mercruiser Temperature/Oil Sender Application

Model Serial # Oil Pressure

Water Temperature
ROVER 31400000F & UP � 18-5897
110 1565944-1566081 18-5899 18-5898
110 1602980 & UP 18-5899 18-5898
120 2324346 & BELOW 18-5899 (1)(2) 18-5898 (2)
120 2324347 & UP 18-5899 (2) 18-5897 (2)
140 (4 cyl/3.0) 2508061 - 3462607 18-5899 (2) 18-5897 (2)
140 (4cyl/3.0) 4512156 & UP 18-5899 (2) 18-5897 (2)
3.0L/3.0LX C856559 & UP 18-5899 18-5897
140 (6 cyl) 1566119-1725960 18-5899 18-5898
150 1666495-2048046 18-5899 18-5898
160 2048022-2770031 18-5899

18-5898(5)
165 2770032 & UP 18-5899 18-5897
165/3.7L/170/180 6916779 & UP 18-5899 �
175 (262 CID) B527955 & UP 18-5899 (2) 18-5897 (2) (6) 18-5898 (2) (7)
4.3L (Generation II) D714107 & UP 18-5899 (2) 18-5897 (2)
185 (229 CID) 6330183 & UP 18-5899 (2) 18-5897 (2)
185 (262 CID) A331455 & UP 18-5899 (2) 18-5897 (2)
190 1504311-1730903 18-5899 18-5898
190 (4 cyl) 6916779 & UP 18-5899 �
200 2453769-271202 18-5899 18-5897
200 6218462 & UP 18-5899 (2) 18-5897 (2)
200/5.0 B525982 & UP � 18-5898 (2) (6)
205 (262 CID) A331455 & UP 18-5899 (2)

18-5897 (2)
205 (4.3L) B527955 & UP 18-5899 (2) 18-5897 (2) (6) 18-5898 (2) (7)
4.3LX (Generation II) D714370 & UP 18-5899 (2) 18-5897 (2)
215 2781153 & UP 18-5899 18-5897
225 (Ford) 3385721 & UP 18-5899 18-5897
225 (GM) 1632308-2694014 18-5899

18-5897 (8) 18-5898 (9)
228 4765100-6218461 18-5899 18-5898
228 & 230 6218462 & UP 18-5899 (2) 18-5897 (2)
230 (I.B.) 5907058 & UP 18-5899 (2) 18-5897 (2)
230 (5.0) B522506 & UP 18-5899 (10)

18-5898 (7)
233 Ford 4173000 & UP 18-5899

18-5898
250 9314301-4908849 18-5899

18-5897 (8) 18-5898 (9)
255 3258728 & UP 18-5899 18-5898
260 4908850-6218461 18-5899 18-5898
260 6218462 & UP 18-5899 (2) 18-5897 (2)
260/5.7 B522506 & UP 18-5899 (10)

18-5898 (7)
260 5907058 & UP 18-5899 (2) 18-5897 (2)
270 2851074-3077735 18-5899 18-5897
280 4176250 & UP 18-5899 18-5898
300 MR/TRS 6668677 & UP 18-5899 (2) 18-5897 (2)
320 A543604 & UP 18-5899 (2) 18-5897 (2)
325 2278747 & UP 18-5899

18-5897 (8) 18-5898 (9)
330 4623115 & UP 18-5899 18-5898
330/W.B.W. 6083145 & UP 18-5899 (2) 18-5897 (2)
340/7.4L 5889914 & UP 18-5899 (2) 18-5897 (2)
350 3780450 & UP 18-5899 18-5898
350 (Magnum) A635178- B525981 18-5899 (2) 18-5897 (2)
350 (Magnum) B525982-0505449 � 18-5898 (2) (7)
350 (Magnum) D505450 & UP 18-5899 (2) 18-5897 (2)
370 (TRS) 4179554 & UP 18-5899 (2) 18-5897 (2)
390 2781129-2825059 18-5899 18-5897
400 4179554 & UP 18-5899 18-5897
420/425 A398941 & UP 18-5899 (2) 18-5897 (2)
440 4179554 & UP 18-5899 18-5897
454 (Magnum) A631894 & UP 18-5899 (2) 18-5897 (2)
454 (Bravo) B721206-D805068 18-5899 (2) 18-5898 (2) (7)
460

4179554

 18-5899  18-5897

465

500

C849992 & UP

C577254 & UP

18-5899 (2)

18-5899 (2)

18-5897 (2)

18-5897 (2)
502 (Bravo) C878221 & UP 18-5899 18-5897
502 (Bravo Gen V) D824589 & UP � 18-5897
525 D456000 & UP 18-5899 18-5897
575 A677429 & UP 18-5899 18-5899
888 3108723 & UP 18-5899 18-5897
898 4762210-6218461 18-5899 18-5898
898 6218462 & UP 18-5899 (2) 18-5897 (2)
5.7 A338553-B514626 18-5899 (2) 18-5897 (2)
5.7 B514627-B525981 18-5899 (2) 18-5897 (2) (6) 18-5898 (2) (7)
5.7 (Bravo) B525982 & UP �

18-5897 (6) 18-5898 (7)
7.4 (Bravo) B771113-D803117 18-5899 (2) 18-5897 (2) (6) 18-5898 (2) (7)
7.4 (Bravo Gen V) D803118 & UP � 18-5897 (2)
7.4L (Hurth) ALL 18-5899 (2) 18-5897 (2)
454 D805069 & UP � 18-5897 (2)
8.2 C878221-D857199 18-5899 (2) 18-5897 (2)
8.2 D857200 & UP � 18-5897 (2)

(1) S/N - 3377341-3461707 & 5192049 & UP     (2) Does not include dual application

(3) S/N 6229718 & UP does not include dual application       (4) 2326069 & UP

(5) 2233574 & Below     (6) 3/8-18      (7) 1/2-14      (8) Electric Choke     (9) Auto Choke

(10) Thru S/N B525981 only.

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