Mercury Head Gaskets

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Model/ HP

(4 to 250)

Model/ HP

Cyl.

Beg. S/N

End. S/N

Sierra Head Gasket

Mallory Head Gasket

4 HP (4 stroke)1OR000001& UP18-3844 -
5 HP (4 stroke)1OR000001& UP18-3844 -
6 HP (4 stroke)1OR000001& UP18-3844 -
25 HP (4 stroke)2OG760300& UP18-3846-
40 HP (4 stroke)4OG760300& UP18-3845 -
45 HP (4 stroke)4OG760300& UP18-3845 -
50 HP (4 stroke)4OG760300& UP18-3845 -
105 JET6D082000& UP18-3864 9-63854
V-135V-6A904646C23955218-3863 9-63855
V-135V-6C239553G96049918-3861 9-63851
140 JETV-6D082000G96049918-3864 9-63854
V-150V-66042946C23955218-3863 9-63855
V-150V-6C239553G96049918-3861 9-63851
V-150 XR4 MAGIIIV-6B242885C23955218-3862 9-63853
V-150 XR4V-6C239553D08199918-3871 9-63856
V-150 EFI XR6MAGIIIV-6D082000G96049918-3864 9-63854
150 MARV-66038681C23955318-3863 9-63855
150 MARV-6C239554& UP18-3861 9-63851
V-175V-66618751C23955218-3862 9-63853
V-175V-6C239553D08199918-3871 9-63856
V-175V-6D082000G96049918-3864 9-63854
V-175 XRI EFIV-6D000750D08199918-3871 9-63856
V-175 XRI EFIV-6D000750D08199918-3864 9-63854
V-175 XRI EFIV-6D082000G30304518-3864 9-63854
V-200,200,2000V-64839034607319118-3872 9-63852
V-200V-66073192620399018-3872 9-63852
V-200 (EFI)V-6OC100861OC29151918-3862 9-63853
V-200 (EFI)V-6OC291520OG96049918-3862 9-63853
V-200 (2.4L)V-66203991C29151918-3862 9-63853
V-200 (2.5L)V-6C291520& UP18-3864 9-63854
V-200 XRI EFIV-6C100861C29151918-3862 9-63853
V-200 XRI EFIV-6C291520& UP18-3864(2) 9-63854
V-220V-6B117316& UP18-3862 9-63853
V-225V-65628028D28081218-3872 9-63852
V-225V-6OD280813& UP18-7400 -
V-225 SEA PROV-6OG245605OT40899918-7400 -
V-225 EFI (3.0L)V-6OG129222OG76029918-7400 -
V-250 EFI (3.0L)V-6OG129222OT40899918-7400 -

Model/ HP

Cyl.

Beg. S/N

End. S/N

Sierra Head Gasket

Mallory Head Gasket

Notes:
(2) : 2 head gaskets required
Refine Parts List
Model/ HP

(4 to 250)
Head Gasket - Sierra
Your Price: $29.99
Save: $5.50
(15% Off $35.49)
Part # 18-3804 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-84733M
  • MERCURY MARINE 27-19138M
  • MERCURY MARINE 27-19138
  • YAMAHA 689-W0001-A1-00
  • YAMAHA 689-11181-02-00
    For: Mercury/Mariner Model 30A; S/N Code 689
Head Gasket - Sierra
Your Price: $29.99
Save: $6.85
(18% Off $36.84)
Part # 18-3827 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-8254821
  • YAMAHA 6G8-11181-A1-00
  • YAMAHA 6G8-11181-00-00

  • For: Mercury/Mariner 8, 9.9 HP 4-Stroke
Head Gasket - Sierra
Your Price: $14.99
Save: $2.55
(14% Off $17.54)
Part # 18-3828 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-98990M
  • MERCURY MARINE 27-83899M
  • MERCURY MARINE 27-18937M
  • MERCURY MARINE 27-18937
  • YAMAHA 6E7-11181-A1-00
  • YAMAHA 6E7-11181-00-00
    For: Mercury/Mariner Model 9.9C;S/N Code 682 & Model 15C, S/N Code 684
Head Gasket - Sierra
Your Price: $20.99
Part # 18-3844 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-803508

  • For: Mercury/Mariner 4-Stroke O/B's, 4/5/6 HP S/N OR000001 & up
Head Gasket - Sierra
Your Price: $69.99
Part # 18-3845 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-825032

  • For: Mercury/Mariner 4-Strokes O/B's, 40/45/50 HP S/N OG760300 & up
Head Gasket - Sierra
Your Price: $29.99
Save: $5.37
(15% Off $35.36)
Part # 18-3861 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-18785-1

  • For: Mercury/Mariner Model 135,150,and XR4
Head Gasket - Sierra
Your Price: $24.99
Save: $4.63
(15% Off $29.62)
Part # 18-3862 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 27-41246-1

  • For: Mercury/Mariner Model 175, 200, XR4
Head Gasket - Sierra
Your Price: $24.99
Save: $4.33
(14% Off $29.32)
Part # 18-3863 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 27-96542-1

  • For Mercury/Mariner Model 150
Head Gasket for Mercury/Mariner 27-822844-1, GLM 35870 - Sierra
Your Price: $30.99
Save: $6.64
(17% Off $37.63)
Part # 18-3864 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-822844-1

  • For: Mercury/Mariner Model 175, 200 and XR6
Head Gasket - Sierra
Your Price: $34.99
Save: $6.43
(15% Off $41.42)
Part # 18-3871 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-18786-1

  • For: Mercury/Mariner Model 175, XR4, Mag 11
Head Gasket for Mercury/Mariner 27-41245-1, GLM 35900 - Sierra
Your Price: $38.99
Save: $7.42
(15% Off $46.41)
Part # 18-3872 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-41245-1

  • For:Mercury/Mariner 200 and 225 HP
20 HP Cylinder Block Gasket for Mercury/Mariner 27-78410, GLM 30980 - Sierra
Your Price: $6.99
Part # 18-0372 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-78410
Exhaust Cover Gasket 80 HP - Sierra
Your Price: $12.99
Part # 18-2500-9 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 27-85493
Pkg. of 2
Block Cover Gasket 3 Cylinder - Sierra
Your Price: $9.99
Save: $2.06
(17% Off $12.05)
Part # 18-2504-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-88449
  • Pkg. of 2
Cylinder Block Head Gasket 75-80 HP for Mercury/Mariner 27-96171-1, GLM 32420 - Sierra
Your Price: $18.99
Part # 18-2505-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-96171-1
  • Pkg. of 2
Cylinder Block Gasket 40-50 HP - Sierra
Your Price: $8.99
Save: $2.59
(22% Off $11.58)
Part # 18-2507-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-85487
  • PKG. of 2
Cylinder Block Head Gasket for Mercury/Mariner 27-43005-7, GLM 37660 - Sierra
Your Price: $11.99
Save: $1.99
(14% Off $13.98)
Part # 18-2740 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-43005-7
  • For: 65 Jet, 75 HP 3 cyl, 90 HP 3 cyl.
Block Cover Gasket 35-40 HP - Sierra
Your Price: $7.99
Save: $1.33
(14% Off $9.32)
Part # 18-2805-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-85490-2
  • Pkg. of 2
Cylinder Cover Gasket V6 for Mercury/Mariner 27-65788, GLM 30680 - Sierra
Your Price: $14.99
Part # 18-2806-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-65788
  • Pkg. of 2
Block Cover Gasket 90-115 HP for Mercury/Mariner 27-98185-3, GLM 32320 - Sierra
Your Price: $19.99
Save: $4.03
(16% Off $24.02)
Part # 18-2807-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-98185-3
Pkg. of 2
Cylinder Cover Gasket V6 - Sierra
Your Price: $7.99
Save: $1.88
(19% Off $9.87)
Part # 18-2808-9 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 27-96278
  • Pkg. of 2
50-60 HP Block Cover Gasket - Sierra
Your Price: $14.99
Save: $3.40
(18% Off $18.39)
Part # 18-2809-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-43779-2
  • Pkg. of 2
Block Cover Gasket 45-50 HP - Sierra
Your Price: $16.99
Save: $4.57
(21% Off $21.56)
Part # 18-2810-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-43777-2
  • Pkg. of 2
Block Cover Gasket - Sierra
Your Price: $4.99
Save: $2.99
(37% Off $7.98)
Part # 18-2837-9 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 27-41382
Pkg. of 2
Cylinder Block Head Gasket for Mercury/Mariner 27-44328-4, GLM 37670 - Sierra
Your Price: $15.99
Save: $2.56
(13% Off $18.55)
Part # 18-2943 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-44328-4
    For: 81 Jet, 100 HP, 115 HP, and 125 HP 4 cyl. outboards
Mallory Gasket, Cylinder head 9-63964
Mallory Gasket, Cylinder head 9-63964
Your Price: $29.99
Save: $6.85
(18% Off $36.84)
Part # 9-63964 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Replaces GLM #:34910
Replaces Original Equipment Manufacturer(OEM):Yamaha
Replaces Original Equipment Manufacturer # (OEM #):6G8-11181-A1
Fits Application:9.9 4-stroke
Mallory Gasket, Cylinder Head 9-63856
Mallory Gasket, Cylinder Head 9-63856
Your Price: $34.99
Save: $6.43
(15% Off $41.42)
Part # 9-63856 ValueShip™ Eligible
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Replaces GLM #:35890
Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):27-18786-1
Fits Application:175, XR4, MAG II
Mallory Gasket, Cylinder Head 9-63854
Mallory Gasket, Cylinder Head 9-63854
Your Price: $30.99
Save: $6.64
(17% Off $37.63)
Part # 9-63854 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Replaces GLM #:35870
Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):27-822844-1
Fits Application:175, 20, XR6
Mallory Gasket, Cylinder Head 9-63852
Mallory Gasket, Cylinder Head 9-63852
Your Price: $38.99
Save: $7.42
(15% Off $46.41)
Part # 9-63852 ValueShip™ Eligible
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Replaces GLM #:35900
Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):27-41245-1
Fits Application:200, 225
Mallory Gasket, Cylinder Head 9-63851
Mallory Gasket, Cylinder Head 9-63851
Your Price: $29.99
Save: $5.37
(15% Off $35.36)
Part # 9-63851 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Replaces GLM #:35850
Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):27-18785-1
Fits Application:135, 150, XR4
Mallory O-Ring, Cylinder Head 9-63850
Mallory O-Ring, Cylinder Head 9-63850
Your Price: $3.99
Save: $0.12
(2% Off $4.11)
Part # 9-63850 ValueShip™ Eligible
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Replaces Original Equipment Manufacturer(OEM):Mercury
Replaces Original Equipment Manufacturer # (OEM #):25-818573
Fits Application:200-300 EFI, DFI, & Carb
Yamaha 9.9 / 15 Hp Cylinder Head Gasket
Yamaha 9.9 / 15 Hp Cylinder Head Gasket
Your Price: $10.63
Part # 506-30
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    Yamaha:
  • 6E7-11181-A1
Merc. Vertical Reed Block Housing Gkt.
Merc. Vertical Reed Block Housing Gkt.
Your Price: $3.83
Part # 516-26
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    Mercury:
  • 27-93536-1
Mercury 150 / 175 Hp V6 2.0L Head Cover Gasket
Mercury 150 / 175 Hp V6 2.0L Head Cover Gasket
Your Price: $2.40
Part # 505-40
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    Mercury:
  • 27-65788
Mercury 150 Hp Head Cover Gasket
Mercury 150 Hp Head Cover Gasket
Your Price: $2.01
Part # 505-37
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    Mercury:
  • 27-96278
Mercury 50 / 60-70 Hp 3 Cylinder Head Gasket
Mercury 50 / 60-70 Hp 3 Cylinder Head Gasket
Your Price: $4.50
Part # 505-25
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    Mercury:
  • 27-43779-2
Mercury 40 / 50 Hp 4 Cylinder Head Gasket
Mercury 40 / 50 Hp 4 Cylinder Head Gasket
Your Price: $3.54
Part # 505-30
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    Mercury:
  • 27-43777-2
Mercury 150 / 175 / 200 Hp 2.4L Head Gasket
Mercury 150 / 175 / 200 Hp 2.4L Head Gasket
Your Price: $15.37
Part # 505-42
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    Mercury:
  • 27-41246-1
Mercury 150 Hp 2.0L Vertical Reeds Head Gasket
Mercury 150 Hp 2.0L Vertical Reeds Head Gasket
Your Price: $19.23
Part # 505-36
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    Mercury:
  • 27-96542-1
Mercury 175 / 200 Hp 2.5L Head Gasket
Mercury 175 / 200 Hp 2.5L Head Gasket
Your Price: $17.49 (Out of stock)
Part # 505-45
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    Mercury:
  • 27-822844-1
Johnson/Evinrude 120-140 Hp V4 Looper Big Bore Head Gasket
No Reviews | Write Review | Ask Question
    OMC:
  • 340115
Mercury 150 / 175 Hp V6 2.0L Head Gasket
Mercury 150 / 175 Hp V6 2.0L Head Gasket
Your Price: $17.69
Part # 505-39
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    Mercury:
  • 27-79583-1
Mercury 2.5L DFI Head Gasket
Mercury 2.5L DFI Head Gasket
Your Price: $51.37
Part # 505-41
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    Mercury:
  • 27-852520-3
Mercury V6 2.5L High Performance EFI Head Gasket
Mercury V6 2.5L High Performance EFI Head Gasket
Your Price: $25.66
Part # 505-47
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    Mercury:
  • 27-814658 1
Sierra
Average Customer Review for Head Gasket - Sierra
Based On 1 Review | Write Review
Head gasket
by Richard from new Haven, Illinois on June 09, 2011
Havent used these yet.. But look like good quality
(0 of 1 people found this review helpful)
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Average Customer Review for Exhaust Cover Gasket 80 HP - Sierra
Based On 1 Review | Write Review
Fast delivery
by Gary from Memphis, Indiana on May 30, 2011
Fast delivery and very well packaged. I was concerned the gasket would be bent or broken during delivery but it was shipped with a cardboard backer inside a box. The gasket worked great.
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Average Customer Review for Cylinder Cover Gasket V6 - Sierra
Based On 1 Review | Write Review
Water jacket Gaskets
by Richard from new Haven, Illinois on June 09, 2011
havent used these yet.. But they look like good quality and there are 2 in a package.. I thought there was 1.. .. Good buy
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