Mercruiser Thermostat Gaskets

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Sierra Thermostat Gaskets

Mallory Thermostat Gaskets

90 2851424 3226957 18-2831 9-60012
120/2.5L (2)2324347 UP 18-2831 9-60012
140 (4 CYL)/3.0L 2508261 UP 18-2831 9-60012
3.0L/3.0LX C856559 UP 18-2831 9-60012
160 (2)2326069 2770031 18-2831 9-60012
165 2770032 5813433 18-2831 9-60012
165/3.7L (4 CYL) 6916779 UP 18-2555 -
170 (4 CYL) 6916779 UP 18-2555 -
175/4.3L, 4.3LX (262 CID) (3)B527955 UP 18-2553 (10)9-60005 (16)
175/4.3L, 4.3 LX (262 CID) (4)B527955 UP 18-2552 (11)9-60008 (17)
175/4.3L, 4.3 LX (262 CID) (4)F001220 UP 18-2552 (11)9-60008 (17)
180/3.7L-LX (4 CYL) 6916779 UP 18-2555 -
185 (229 CID) 6330183 6919655 18-2553 (10)9-60005 (16)
185 (262 CID) A331455 B527954 18-2553 (10)9-60005 (16)
190 (4 CYL) 6916779 UP 18-2555 -
200 2453769 2712072 18-2831 9-60012
200 GM 6218462 B525981 18-2553 (10)9-60005 (16)
200/5.0L 0B525982 0F600999 18-2917 9-60007
200/5.0L GM (3)B525982 UP 18-2553 (10)9-60005 (16)
200/5.0L GM (4)B525982 UP 18-2552 (11)9-60008 (17)
205 (262 CID) A331455 B527954 18-2553 (10)9-60005 (16)
205/4.3L, 4.3LX (262 CID) (3)B527955 D714369 18-2553 (10)9-60005 (16)
205/4.3L, 4.3 LX (262 CID) (4)B527955 D714369 18-2552 (11)9-60008 (17)
205/4.3L, 4.3 LX (262 CID) (4)F001220 UP 18-2552 (11)9-60008 (17)
215 FORD 3040411 UP 18-2834 9-60011
215 FORD MCM/MIE 3040411 3385720 18-2834 9-60011
225 FORD MCM/MIE 3385721 4176999 18-2834 9-60011
225 GM 2278647 2399197 18-2552 (11)9-60008 (17)
225 GM 2399198 2694014 18-2553 (12)9-60005 (18)
225/225S FORD 3385721 UP 18-2834 9-60011
228 GM MCM/MIE 4765100 6218461 18-2844 (13)9-60010 (19)
228 GM 4765100 6218461 18-2844 9-60010
228 GM 6218462 B525981 18-2553 (10)9-60005 (16)
230 GM 6218462 B525981 18-2553 (10)9-60005 (16)
230 MIE 5907058 0B5225505 18-2553 (14)9-60005 (20)
230 GM IB (5)5907058 B522505 18-2553 (10)9-60005 (16)
230 GM IB (6)5907058 B522505 18-2553 (12)9-60005 (18)
230/5.0L GM IB (5)B522506 B525981 18-2553 (10)9-60005 (16)
230/5.0L GM IB (5)B522506 B525981 18-2552 (11)9-60008 (17)
230/5.0L GM IB (6)B522506 B525981 18-2553 (12)9-60005 (18)
230/5.0L-LX GM (3)B525982 F600999 18-2553 (10)9-60005 (16)
230/5.0L-LX GM (4)B525982 UP 18-2552 (11)9-60008 (17)
230/5.0L GM IB (4)B522506 B525981 18-2552 (11)9-60008 (17)
230/5.0L-LX GM B525982 F600999 18-2552 (11)9-60008 (17)
230/5.0L MIE 0B522506 0B788151 18-2553 (14)9-60005 (20)
230/5.0LX GM 0B525982 0F600999 18-2917 9-60007
233 FORD 4173000 UP 18-2834 9-60011
233 FORD MIE 4173000 4902304 18-2834 9-60011
250 GM 2314301 2639854 18-2553 (12)9-60005 (18)
250 GM 4768000 4908849 18-2844 9-60010
250 GM 4768000 4908849 18-2844 (13)9-60010 (19)
250 GM MCM/MIE 2314301 2639854 18-2553 (14)9-60005 (20)
250 GM MCM/MIE 4175500 5907057 18-2844 (13)9-60010 (19)
255 FORD 3258728 UP 18-2834 9-60011
255 FORD MCM/MIE 3258728 4178299 18-2834 9-60011
255 GM 4175500 4767999 18-2844 9-60010
260 GM 4908850 6218461 18-2844 9-60010
260 GM 6218462 B525981 18-2553 (10)9-60005 (16)
260 GM 4908850 6218461 18-2844 (13)9-60010 (19)
260 GM IB (5)5907058 B522505 18-2553 (10)9-60005 (16)
260 GM IB (6)5907058 B522505 18-2553 (12)9-60005 (18)
260 MIE 5907058 0B522505 18-2553 (14)9-60005 (20)
260/5.7L GM IB (5)B522506 B525981 18-2553 (10)9-60005 (16)
260/5.7L GM IB (5)B522506 B525981 18-2552 (11)9-60008 (17)
260/5.7L GM IB (5)B522506 B525981 18-2552 (11)9-60008 (17)
260/5.7L GM IB (6)B522506 B525981 18-2553 (12)9-60005 (18)
260/5.7L GM (3)B525982 F600999 18-2553 (10)9-60005 (16)
260/5.7L GM (4)B525982 F600999 18-2552 (11)9-60008 (17)
260/5.7L GM (4)B525982 F600999 18-2552 (11)9-60008 (17)
260/5.7L GM 0B525982 0F600999 18-2917 9-60007
260/5.7L MIE 0B522506 0F024999 18-2553 (14)9-60005 (20)
262 MAG ALPHA 0F803800 0K999999 18-2917 9-60007
262 MAG BRAVO 0F803800 0K999999 18-2917 9-60007
350 Mag B525982 F600999 18-2552 (11)9-60008 (17)
4.3L/LX GM 0F000878 0F601126 18-2917 9-60007
4.3L/LX/LXH ALPHA 0F601127 0K999999 18-2917 9-60007
4.3L/LX/LXH BRAVO 0F601127 0K999999 18-2917 9-60007
4.3L/LH/EFI ALPHA 0L010044 UP 18-2917 9-60007
4.3L/LH/EFI 0L010044 UP 18-2917 9-60007
5.0L/EFI ALPHA 0L012052 UP 18-2917 9-60007
5.0L/EFI BRAVO 0L012052 UP 18-2917 9-60007
5.7 GM ALPHA 0F225560 0K999999 18-2917 9-60007
5.7 GM BRAVO 0F225560 0K999999 18-2917 9-60007
5.7L/EFI GM ALPHA 0L010037 UP 18-2917 9-60007
5.7L/EFI GM BRAVO 0L010037 UP 18-2917 9-60007
5.7 GM (SKI) A338553 B514626 18-2553 (10)9-60005 (16)
5.7L SKI 0B514627 UP 18-2917 9-60007
5.7 GM SKI/BRAVO (3)B514627 UP 18-2553 (10)9-60005 (16)
5.7 GM SKI/BRAVO (4)B514627 UP 18-2552 (11)9-60008 (17)
5.7 GM SKI/BRAVO (4)B514627 UP 18-2552 (11)9-60008 (17)
5.7L MIE 0F025000 0F622099 18-2844 9-60010
5.7L MIE 0F622100 0K999999 18-2917 9-60007
5.7L MIE 0F622100 0K999999 18-2844 9-60010
5.7L MIE 0L002003 UP 18-2917 9-60007
270 GM 2851074 3077735 18-2553 (12)9-60005 (18)
270 GM MCM/MIE 2851074 3385720 18-2553 (14)9-60005 (20)
280 GM 4176250 4770199 18-2844 (13)9-60010 (19)
280 GM TRS 4176250 4770199 18-2844 9-60010
300 MR/TRS GM 6668677 B430367 18-2553 (10)9-60005 (16)
320 GM EFI A543604 UP 18-2553 (12)9-60005 (18)
320 GM 0A543604 0C622418 18-2553 (14)9-60005 (20)
325 GM MCM/MIE 2278747 3780449 18-2553 (14)9-60005 (20)
325 GM 2278747 2313964 18-2553 9-60005
325 GM 2313965 3042730 18-2553 (12)9-60005 (18)
325 GM 3042731 UP 18-2844 9-60010
330 GM 4623115 UP 18-2844 9-60010
330 GM MCM/MIE 4623115 0B816540 18-2553 (14)9-60005 (20)
330 GM W/BW (5)6083145 UP 18-2553 (10)9-60005 (16)
330 GM W/BW (6)6083145 UP 18-2553 (12)9-60005 (18)
340/7.4L GM IB (5)5889914 UP 18-2553 (10)9-60005 (16)
340/7.4L GM IB (5)5889914 UP 18-2552 (11)9-60008 (17)
340/7.4L GM IB (6)5889914 UP 18-2553 (12)9-60005 (18)
340/7.4L MIE 5889914 0D715493 18-2553 (14)9-60005 (20)
350 MAG 0B252882 0K999999 18-2917 9-60007
350 MAG 0B252882 0K999999 18-2917 9-60007
350 MAG SKI 0D505450 0K999999 18-2917 9-60007
350 MAG EFI SKI 0F215561 0K999999 18-2917 9-60007
350 MAG MPI/MIE 0L010019 UP 18-2917 9-60007
350 MAG MPI SKI 0F350583 UP 18-2917 9-60007
SCORPION SKI 0F800000 UP 18-2917 9-60007
7.4 BRAVO GM (3)B771113 D603117 18-2553 (10)9-60005 (16)
7.4 BRAVO GM (4)B771113 UP 18-2552 (11)9-60008 (17)
7.4 BRAVO GM (4)D603118 UP 18-2552 (11)9-60008 (17)
7.4L W/HURTH IB (5)C391564 D715493 18-2552 (11)9-60008 (17)
7.4L W/HURTH IB (6)C391564 UP 18-2553 (12)9-60005 (18)
7.4L W/HURTH IB D715494 UP 18-2553 (12)9-60005 (18)
7.4L/LX GM 0F352000 0K999999 18-2917 9-60007
7.4L MPI/TBI 0F563052 UP 18-2917 9-60007
7.4L MIE 0C391564 0D715493 18-2553 (14)9-60005 (20)
7.4L MIE 0C391564 0F349999 18-2553 (14)9-60005 (20)
7.4L MIE 0D715494 0F820141 18-2553 (14)9-60005 (20)
7.4L MIE 0F820142 0K999999 18-2917 9-60007
7.4L MIE 0F820142 0K999999 18-2844 (13)9-60010 (19)
350 GM 3780450 UP 18-2844 9-60010
350 GM (MAGNUM) A635178 B525981 18-2553 (10)9-60005 (16)
350 GM (MAGNUM) (3)B525982 UP 18-2553 (10)9-60005 (16)
350 GM (MAGNUM) (4)B525982 UP 18-2552 (11)9-60008 (17)
350 GM (MAGNUM) (4)B525982 UP 18-2552 (11)9-60008 (17)
350 MIE 3780450 4623109 18-2844 (13)9-60010 (19)
370 GM 4179554 6721527 18-2553 (14)9-60005 (20)
370 TRS GM 4179554 6721527 18-2553 (12)9-60005 (18)
370 TRS GM 6721528 UP 18-2553 (10)9-60005 (16)
390 GM 2781129 2825059 18-2553 (12)9-60005 (18)
390 GM MCM/MIE 2781129 3042731 18-2553 (14)9-60005 (20)
400 GM 4179554 0B457644 18-2553 (14)9-60005 (20)
400 TRS GM 4179554 UP 18-2553 (12)9-60005 (18)
420 GM A398941 UP 18-2553 (12)9-60005 (18)
420 GM 0A398941 0B622418 18-2553 (14)9-60005 (20)
440 TRS GM 4179554 UP 18-2553 (12)9-60005 (18)
454 GM MAGNUM/ALPHA (3)A631894 B785148 18-2553 (10)9-60005 (16)
454 GM MAGNUM/BRAVO (4)A631894 UP 18-2552 (11)9-60008 (17)
454 GM MAGNUM/BRAVO (4)B721206 UP 18-2552 (11)9-60008 (17)
454 MAG MCM/SKI 0F305000 0K999999 18-2917 9-60007
460 TRS GM 4179554 UP 18-2553 (12)9-60005 (18)
470 4208730 6218036 18-2843 -
470 6218037 UP 18-2555 -
485 5685394 UP 18-2555 -
488 6170297 UP 18-2555 -
500(Gen V) F213293 F615766 18-2844 9-60010
502 EFI/MPI MCM 0F8026000 0K999999 18-2917 9-60007
502 MAG MPI 0L017000 UP 18-2917 9-60007
575 GM 0A677429 0D763716 18-2553 (15)9-60005 (21)
575 A677429 UP 18-2553 (12)9-60005 (18)
8.2L MIE 0D857200 0F350274 18-2917 9-60007
8.2L MIE 0F350275 0F819619 18-2917 9-60007
8.2L MIE 0D857200 0F819619 18-2844 (13)9-60010 (19)
8.2L MPI/MIE 0F819620 UP 18-2917 9-60007
888 FORD 3108723 UP 18-2834 9-60011
888 FORD MCM 3108723 4887829 18-2834 9-60011
898/198 GM 4762210 6218461 18-2844 9-60010
898/198 GM MCM/MIE 4762210 6218461 18-2844 (13)9-60010 (19)
898 GM 6218462 UP 18-2553 (10)9-60005 (16)

Engine / Model

Beginning S/N

Ending S/N

Sierra Thermostat Gaskets

Mallory Thermostat Gaskets

Notes:
  • (2) : Cast Iron
  • (3) : Old Design
  • (4) : New Design
  • (5) : Std. Cooling
  • (6) : Closed Cooling
  • (10) : MUST ORDER 18-2553 AND 18-2554
  • (11) : MUST ORDER 18-2552 AND 18-7173
  • (12) : MUST ORDER 18-2553 AND 18-2844
  • (13) : MUST ORDER 18-2844 AND 18-2917
  • (14) : MUST ORDER 18-2553, 18-2844 AND 18-2917
  • (15) : MUST ORDER 18-2553, 18-2844 AND 18-2914
  • (16) : MUST ORDER 9-60005 AND 9-60006
  • (17) : MUST ORDER 9-60008 AND 9-76501
  • (18) : MUST ORDER 9-60005 AND 9-60010
  • (19) : MUST ORDER 9-60010 AND 9-60007
  • (20) : MUST ORDER 9-60005, 9-60010 AND 9-60007
  • (21) : MUST ORDER 9-60005, 9-60010 AND 9-60034
Refine Parts List
Engine / Model :
Your Price: $1.93 (Out of stock)
Part # 18-0349 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-54506
For: Mercruiser Ford V-8
Your Price: $2.31
Save: $1.57
(40% Off $3.88)
Part # 18-0667-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 27-99506-1
Package of 2
Your Price: $2.50
Save: $2.00
(44% Off $4.50)
Part # 18-2552-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-33179-2
Package of 2
Your Price: $2.83
Save: $1.49
(34% Off $4.32)
Part # 18-2553-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-47510
For: Mercruiser GM V-6, V-8
Package of 2
Your Price: $8.81
Save: $3.19
(26% Off $12.00)
Part # 18-2554-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-41812
  • MERCURY MARINE 27-90556
For: Mercruiser V-6 & V-8
Package of 2
Your Price: $2.57
Save: $1.63
(38% Off $4.20)
Part # 18-2555-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-89656-1
For: Mercruiser 4 Cylinder
Package of 2
Your Price: $2.67
Save: $1.87
(41% Off $4.54)
Part # 18-2831-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-47590-1
For: Mercruiser 4 & 6 Cylinder
Package of 2
Your Price: $3.56
Save: $1.32
(27% Off $4.88)
Part # 18-2834-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Replaces OEM part #
  • MERCURY MARINE 27-60208
For: Mercruiser Ford V-8
Package of 2
Your Price: $9.27
Save: $2.95
(24% Off $12.22)
Part # 18-2843-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 27-74830
For: Mercruiser 470
Package of 2
Your Price: $2.62
Save: $0.86
(24% Off $3.48)
Part # 18-2844-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 27-48818-1
For: Mercruiser V-8
Package of 2
Your Price: $3.54
Save: $2.02
(36% Off $5.56)
Part # 18-2917-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
Replaces OEM part #
  • MERCURY MARINE 27-53045-1
  • GM 3701777
  • OMC 312797
Package of 2
Your Price: $4.40
Save: $1.01
(18% Off $5.41)
Part # 18-0398-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Sierra Thermostat Housing Gaskets

Sierra has years of manufacturing expertise to ensure an exact fit for thermostat housing gaskets to your original equipment. During the manufacturing of the gaskets, a rubber and fiber material is cut to meet strict, OEM specifications. This ensures correct diameter and location of openings found on your engine while not requiring additional trimming. Purchasing the correct Sierra housing gasket can ensure a reduction in labor time.

The thermostat housing gasket comes as a complete set with precise CAD cut gasket. The typical thickness for these products can range up to 1/16". When joining the two surfaces, an exact match is not always possible. It is recommended that during installation, to clean both surfaces to the bare metal and apply a thin layer of RTV silicone sealer on both surfaces to ensure the ultimate seal.

Sierra offers these rubber and fiber gaskets, based on years of manufacturing, eliminating the guess work out of what will work on your next job. They are designed for high-temperature capable of exceeding 500 degrees Fahrenheit.
Mallory Gasket 9-60009
Your Price: $1.99 (Out of stock)
Save: $0.62
(23% Off $2.61)
Part # 9-60009 ValueShip™ Eligible
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Replaces GLM #:35060
Replaces Original Equipment Manufacturer(OEM):Mercruiser
Replaces Original Equipment Manufacturer # (OEM #):27-33918, 27-53045-1
Fits Application:4 & 6 cyl
Your Price: $7.49
Save: $4.38
(36% Off $11.87)
Part # 18-7173-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
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Dimensions ( in )
I.D. 1.875
Width .135

Replaces OEM part #
  • OMC 310327
  • OMC 910582
  • MERCURY MARINE 25-30224
Mallory O-ring 9-76501
Your Price: $1.99 (Out of stock)
Save: $0.24
(10% Off $2.23)
Part # 9-76501 ValueShip™ Eligible
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Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):25-30224
Your Price: $3.62
Save: $1.74
(32% Off $5.36)
Part # 18-2914-9 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 28 mins.
Replaces OEM part #
  • MERCURY MARINE 27-85608-1
Package of 2
Your Price: $0.99 (Out of stock)
Save: $0.86
(46% Off $1.85)
Part # 9-60074
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Fits: GM 250 L6

Replaces: Mercruiser, OMC and Volvo
  • 3852096
Sierra
Average Customer Review for Thermostat Gasket - 18-2917-9 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarReview for Sierra 18-2917 Thermostat Gasket
by a Customer on March 20, 2009
(0 of 2 people found this review helpful)
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Average Customer Review for Water Pump Gasket - 18-2914-9 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 3 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Starwater pump gasket
by Tim from Harold, Kentucky on May 12, 2015
got it in good time and work good
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Full StarFull StarFull StarFull StarFull StarWater Pump Gasket
by Jack from Valiant, Oklahoma on July 24, 2014
fit worked thanks
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Full StarFull StarFull StarFull StarFull Stargasket's
by Kevin from Wellsville, Ohio on May 27, 2011
great price, quality shipping !
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