Mariner Head Gaskets

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Model/ HP :

Model/ HP

Cyl.

Beg. S/N

End. S/N

Sierra Head Gasket

4 HP (4 stroke) 1 OR000001 & UP 18-3844
5 HP (4 stroke) 1 OR000001 & UP 18-3844
6 HP (4 stroke) 1 OR000001 & UP 18-3844
25 HP (4 stroke) 2 OG760300 & UP 18-3846
40 HP (4 stroke) 4 OG760300 & UP 18-3845
45 HP (4 stroke) 4 OG760300 & UP 18-3845
50 HP (4 stroke) 4 OG760300 & UP 18-3845
105 JET 6 D082000 & UP 18-3864
V-135 V-6 A904646 C239552 18-3863
V-135 V-6 C239553 G960499 18-3861
140 JET V-6 D082000 G960499 18-3864
V-150 V-6 6042946 C239552 18-3863
V-150 V-6 C239553 G960499 18-3861
V-150 XR4 MAGIII V-6 B242885 C239552 18-3862
V-150 XR4 V-6 C239553 D081999 18-3871
V-150 EFI XR6MAGIII V-6 D082000 G960499 18-3864
150 MAR V-6 6038681 C239553 18-3863
150 MAR V-6 C239554 & UP 18-3861
V-175 V-6 6618751 C239552 18-3862
V-175 V-6 C239553 D081999 18-3871
V-175 V-6 D082000 G960499 18-3864
V-175 XRI EFI V-6 D000750 D081999 18-3871
V-175 XRI EFI V-6 D000750 D081999 18-3864
V-175 XRI EFI V-6 D082000 G303045 18-3864
V-200,200,2000 V-6 4839034 6073191 18-3872
V-200 V-6 6073192 6203990 18-3872
V-200 (EFI) V-6 OC100861 OC291519 18-3862
V-200 (EFI) V-6 OC291520 OG960499 18-3862
V-200 (2.4L) V-6 6203991 C291519 18-3862
V-200 (2.5L) V-6 C291520 & UP 18-3864
V-200 XRI EFI V-6 C100861 C291519 18-3862
V-200 XRI EFI V-6 C291520 & UP 18-3864 (2)
V-220 V-6 B117316 & UP 18-3862
V-225 V-6 5628028 D280812 18-3872
V-225 V-6 OD280813 & UP 18-7400
V-225 SEA PRO V-6 OG245605 OT408999 18-7400
V-225 EFI (3.0L) V-6 OG129222 OG760299 18-7400
V-250 EFI (3.0L) V-6 OG129222 OT408999 18-7400

Model/ HP

Cyl.

Beg. S/N

End. S/N

Sierra Head Gasket

Notes:
  • (2) : 2 head gaskets required
Refine Parts List
Model/ HP :
Your Price: $23.28
Save: $12.57
(35% Off $35.85)
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
Your Price: $31.99
Save: $11.10
(25% Off $43.09)
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
Your Price: $13.00
Save: $7.49
(36% Off $20.49)
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
Your Price: $13.11
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(33% Off $19.67)
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
Your Price: $69.98
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
Your Price: $23.91
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(35% Off $36.81)
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
Your Price: $24.99
Save: $6.49
(20% Off $31.48)
Part # 18-3862 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-41246-1

  • For: Mercury/Mariner Model 175, 200, XR4
Your Price: $19.98
Save: $10.56
(34% Off $30.54)
Part # 18-3863 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-96542-1

  • For Mercury/Mariner Model 150
Your Price: $23.18
Save: $17.10
(42% Off $40.28)
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
Your Price: $34.00
Save: $9.47
(21% Off $43.47)
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
Your Price: $40.99
Save: $12.17
(22% Off $53.16)
Part # 18-3872 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-41245-1

  • For:Mercury/Mariner 200 and 225 HP
Your Price: $6.83
Part # 18-0372 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-78410
Your Price: $11.98
Part # 18-2500-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-85493
Pkg. of 2
Your Price: $9.99
Save: $4.17
(29% Off $14.16)
Part # 18-2504-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-88449
  • Pkg. of 2
Your Price: $18.00
Part # 18-2505-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-96171-1
  • Pkg. of 2
Your Price: $9.99
Save: $4.45
(30% Off $14.44)
Part # 18-2507-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-85487
  • PKG. of 2
Your Price: $11.99
Save: $2.89
(19% Off $14.88)
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.
Your Price: $7.99
Save: $1.57
(16% Off $9.56)
Part # 18-2805-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-85490-2
  • Pkg. of 2
Your Price: $14.08
Part # 18-2806-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-65788
  • Pkg. of 2
Your Price: $19.98
Save: $6.20
(23% Off $26.18)
Part # 18-2807-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-98185-3
Pkg. of 2
Your Price: $7.99
Save: $3.57
(30% Off $11.56)
Part # 18-2808-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-96278
  • Pkg. of 2
Your Price: $15.00
Save: $4.96
(24% Off $19.96)
Part # 18-2809-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-43779-2
  • Pkg. of 2
Your Price: $20.99
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(26% Off $28.56)
Part # 18-2810-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-43777-2
  • Pkg. of 2
Your Price: $4.99
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(39% Off $8.26)
Part # 18-2837-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-41382
Pkg. of 2
Your Price: $14.99
Save: $4.16
(21% Off $19.15)
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
Yamaha 9.9 / 15 Hp Cylinder Head Gasket
Your Price: $5.68
Save: $8.13
(58% Off $13.81)
Part # 506-30
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    Yamaha:
  • 6E7-11181-A1
Merc. Vertical Reed Block Housing Gkt.
Your Price: $2.04
Save: $2.93
(58% Off $4.97)
Part # 516-26
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    Mercury:
  • 27-93536-1
Mercury 150 / 175 Hp V6 2.0L Head Cover Gasket
Your Price: $1.29
Save: $1.83
(58% Off $3.12)
Part # 505-40
SHIPS TODAY!* if ordered in 53 mins.
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    Mercury:
  • 27-65788
Mercury 150 Hp Head Cover Gasket
Your Price: $2.13
Save: $0.40
(15% Off $2.53)
Part # 505-37
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    Mercury:
  • 27-96278
Mercury 50 / 60-70 Hp 3 Cylinder Head Gasket
Your Price: $2.81
Save: $3.03
(51% Off $5.84)
Part # 505-25
SHIPS TODAY!* if ordered in 53 mins.
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    Mercury:
  • 27-43779-2
Mercury 40 / 50 Hp 4 Cylinder Head Gasket
Your Price: $3.74
Save: $0.86
(18% Off $4.60)
Part # 505-30 ValueShip™ Eligible
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    Mercury:
  • 27-43777-2
Mercury 150 / 175 / 200 Hp 2.4L Head Gasket
Your Price: $16.21
Save: $3.74
(18% Off $19.95)
Part # 505-42
SHIPS TODAY!* if ordered in 53 mins.
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    Mercury:
  • 27-41246-1
Mercury 150 Hp 2.0L Vertical Reeds Head Gasket
Your Price: $10.26
Save: $14.71
(58% Off $24.97)
Part # 505-36
SHIPS TODAY!* if ordered in 53 mins.
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    Mercury:
  • 27-96542-1
Mercury 175 / 200 Hp 2.5L Head Gasket
Your Price: $9.33
Save: $13.37
(58% Off $22.70)
Part # 505-45
SHIPS TODAY!* if ordered in 53 mins.
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    Mercury:
  • 27-822844-1
Johnson/Evinrude 120-140 Hp V4 Looper Big Bore Head Gasket
Your Price: $6.86
Save: $9.81
(58% Off $16.67)
Part # 505-10
SHIPS TODAY!* if ordered in 53 mins.
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    OMC:
  • 340115
Yamaha 20 / 25 Hp Cylinder Head Gasket
Your Price: $22.24
Save: $5.13
(18% Off $27.37)
Part # 506-21
SHIPS TODAY!* if ordered in 53 mins.
Hurry! Only 1 left in stock
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    Yamaha:
  • 6L2-11181-A2
Sierra
Average Customer Review for Mry Head Gasket V6 - 18-3862 - Sierra
Full StarFull StarFull StarEmpty StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarEmpty StarEmpty StarWrong head gasket.
by Eddie from Opelousas, Louisiana on August 10, 2015
I didn't contact you about the gasket because it wasn't entirely your fault.I think it was Sierra's fault . My problem was that I ordered the 18-3862 gasket and I was sent the 18-3861 gasket,but I had open the pack and tried to installed it before I realized it.Then I checked the numbers on the gasket.It was packed by Sierra. So I was stucked.That's all I can say about the order.
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Average Customer Review for Head Gasket - 18-3863 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarHead 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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Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarFast 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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Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarWater 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
(1 of 1 people found this review helpful)
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Q:
Will this part fir my mercury outboard 135hp serial number OD222525?
A:
Yes this will work for your motor.
Q:
Why are there 2 gaskets in the package?
A:
Yes, the "18-2807-9" comes 2 per pack.
Q:
Is replacing this gasket something a consumer can do?
A:
Replacing a head gasket is a DIY project. You will want to follow a repair manual, but basic idea is to remove the cylinder head cover and scrape out the old gasket. If you have more technical questions you should contact a dealer or you can post a question in our forums at http://forums.iboats.com/
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