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Mercury Thermostats

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Sierra Thermostat

Mallory Thermostat

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Sierra Thermostat Kit

Mallory Thermostat Kit

6 (2 cyl.)A197112& Down1458618-3549 9-43014---
7.55226935& UP7569218-3553 9-43019---
8 (2 cyl.)A197112& Down1458618-3549 9-43014---
9.85206550& UP7569218-3553 9-43019---
9.9 (2 cyl.)A197112& Down1458618-3549 9-43014---
Sea Pro 10D038000& Down1458618-3549 9-43014---
15 (2 cyl.)B292414& Down1458618-3549 9-43014---
18XDB114231& Down1458618-3549 9-43014---
20XDB114231& Down1458618-3549 9-43014---
25XDB114231& Down1458618-3549 9-43014---
25 (2 cyl.)B238464& Down1458618-3549 9-43014---
25 Sea ProB238464& Down1458618-3549 9-43014---
30 (2 cyl.)G055314& Down1458618-3549 9-43014---
403336258C1591997569218-3553 9-43019---
45 Jet (3 cyl.)G290585& Down1458618-3549 9-43014---
50D000750& UP7569218-3553 9-43019---
50 (3 cyl.)G290585& Down1458618-3549 9-43014---
55 (3 cyl.)G290585& Down1458618-3549 9-43014---
60 (3 cyl.)G290585& Down1458618-3549 9-43014---
60D000750& UP7569218-3553 9-43019---
65354798745716517569218-3553 9-43019---
70457165248252487569218-3553 9-43019---
70 3 cyl.A996142& UP7569218-3553 9-43019803061T118-3569 9-43155
75A996142& UP7569218-3553 9-43019---
75 3 cyl.C222000& UP--9-43155803061T118-3569 -
80A996142& UP7569218-3553 9-43019---
80 3 cyl.A996142& UP--9-43155803061T118-3569 -
90 3 cyl.A996142& UP7569218-3553 9-43019803061T118-3569 9-43155
100 4 cyl.B209468& UP7569218-3553 9-43019803061T118-3569 9-43155
115B209468& UP7569218-3553 9-43019---
115 4 cyl.C100000& UP--9-43155803061T118-3569 -
125 4 cyl.D283222& UP-18-3549 9-43155803061T118-3569 -
V135A904646& UP7569218-3553 9-43019-18-3672 9-43101
V150A904646& UP7569218-3553 9-43019-18-3672 9-43101
V150 XR4C239553C1591997569218-3553 9-43019-18-3672 9-43101
V150 XR6D082000& UP7569218-3553 9-43019-18-3672 9-43101
V150 MAG IIC23955345716517569218-3553 9-43019-18-3672 9-43101
V150 MAG IIID08200048252487569218-3553 9-43019-18-3672 9-43101
V175C100861& UP7569218-3553 9-43019-18-3672 9-43101
V2006435503& UP7569218-3553 9-43019-18-3672 9-43101
V220B117316& UP7569218-3553 9-43019---
V2255628028& UP7569218-3553 9-43019---
V300/3.4L5611648& UP7569218-3553 9-43019---
XR4C239553D0819997569218-3553 9-43019---
Magnum IIC239553D0819997569218-3553 9-43019---

HP

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O.E. #

Sierra Thermostat

Mallory Thermostat

O.E. #

Sierra Thermostat Kit

Mallory Thermostat Kit

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Thermostat 120 Degrees - 18-3549 - Sierra
Summer Sale Price: $19.79
Save: $6.39
(24% Off $26.18)
Part # 18-3549 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 14586
  • For: 6, 7, 8, 9.9, 15 & 30 Hp Mercury/Mariner -A197112& later
  • 120 degrees
Representative Photo only.
Thermostat - 18-3553 - Sierra
Summer Sale Price: $9.89
Save: $4.93
(33% Off $14.82)
Part # 18-3553 ValueShip™ Eligible
Hurry! Only 1 left in stock
143 Degree

Replaces OEM part #
  • MERCURY MARINE 75692
Thermostat Kit - 18-3569 - Sierra
Summer Sale Price: $15.29
Save: $3.88
(20% Off $19.17)
Part # 18-3569 ValueShip™ Eligible
Replaces OEM part #
  • MERCURY MARINE 803061T1
Representative Photo Only.
Thermostat Kit - 18-3672 - Sierra
Summer Sale Price: $15.29
Save: $11.16
(42% Off $26.45)
Part # 18-3672 ValueShip™ Eligible
Contains:
  • ( 1 )Thermostat 18-3553 - replaces Mercury/Mariner O.E. # 75692
  • ( 1 )Thermostat Grommet 18-0182 - replaces Mercury/Mariner O.E. #27-62386
Thermostat Kit - 18-3672D - Sierra
Summer Sale Price: $18.89
Save: $10.54
(35% Off $29.43)
Part # 18-3672D ValueShip™ Eligible
Hurry! Only 1 left in stock
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Contains:
  • ( 1 )Thermostat 18-3553 - replaces Johnson/Evinrude O.E.# 434841 and Mercury/Mariner O.E. # 75692
  • ( 1 )Thermostat Gasket 18-0182 - replaces Johnson/Evinrude O.E.# 310058 and Mercury/Mariner O.E. #27-62386
Thermostat - 18-3535 - Sierra
Summer Sale Price: $54.89
Save: $19.10
(25% Off $73.99)
Part # 18-3535 ValueShip™ Eligible
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    Replaces: 885599004
    Fits: 200 3.0L DFI DTS (ALL), 200 3.0L EFI (2003 & Up)(OT750164 & Up), 200 DFI (1997 & Up)(OG386496 & Up), 225 3.0L EFI (1999 & Up)(OG760300 & Up), 225 3.0L EFI SeaPro ( 2004 & Up) (OT801000 & Up), 225 3.0L DFI DTS (2003 & Up)(OT599000 & Up), 225 DFI (1998 & Up)(OG590000 & Up), 250 3.0L EFI (1999 & Up)(OG760300 & Up), 250 Long 3.0L EFI (OT861319 & Up)
Thermostat - 18-3534 - Sierra
Summer Sale Price: $24.29
Save: $8.69
(26% Off $32.98)
Part # 18-3534 ValueShip™ Eligible
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    Replaces: 850055001
    Fits: 40 3cyl (1998 & Up),40 Jet (2000 & Up), 50 3cyl (1986 & Up), 55 3cyl (1996 & Up), 60 3cyl (1984 & Up)
Thermostat - 18-3536 - Sierra
Summer Sale Price: $27.89
Save: $5.92
(17% Off $33.81)
Part # 18-3536 ValueShip™ Eligible
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    Replaces: 833072003
    Fits: V135 DFI 2.5L (1998 & Up) (OG590000 & Up), V150 DFI 2.5L (1998 & Up)(OG590000 & Up), V175 DFI 2.5L (2001 & Up)(OT178500 & Up)
Thermostat - 18-3537 - Sierra
Summer Sale Price: $19.79
Save: $3.70
(15% Off $23.49)
Part # 18-3537 ValueShip™ Eligible
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    Replaces: 833072004
    Fits: 75 3 cyl DFI 1.5L (2006 & Up) (OT980000 & Up), 90 3 cyl DFI 1.5L (2004 & Up)(OT801000 & Up) , 115 3 cyl DFI 1.5L (2004 & Up)(OT801000 & Up)
Thermostat Kit - 18-3605 - Sierra
Summer Sale Price: $53.09
Save: $9.90
(15% Off $62.99)
Part # 18-3605 ValueShip™ Eligible
Hurry! Only 1 left in stock
    Fits: V-135 DFI (2.5L)(1998 & Up), V-150 DFI (2.5L) (1998 & Up), V-175 DFI (2.5L)(2000 & Up)
Thermostat Kit - 18-3606 - Sierra
Summer Sale Price: $149.39
Save: $65.41
(30% Off $214.80)
Part # 18-3606 ValueShip™ Eligible
Hurry! Only 1 left in stock
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    Fits: 200 3.0L DFI DTS (ALL), 200 3.0L EFI (2003 & Up)(OT750164 & Up), 200 DFI (1997 & Up)(OG386496 & Up), 225 3.0L EFI (1999 & Up)(OG760300 & Up), 225 3.0L EFI SeaPro ( 2004 & Up)(OT801000 & Up), 225 3.0L DFI DTS (2003 & Up) (OT599000 & Up), 225 DFI (1998 & Up)(OG590000 & Up), 250 3.0L EFI (1999 & Up) (OG760300 & Up), 250 Long 3.0L EFI (OT861319 & Up)
Thermostat Cover Kit for Mercury 90390A1 - Mallory
Summer Sale Price: $16.99
Save: $5.50
(24% Off $22.49)
Part # 9-43050 ValueShip™ Eligible
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Replaces: Mercury 90390A1
Fits: V-6
Thermostat Cover Kit for Mercury - Mallory
Summer Sale Price: $33.99
Save: $12.35
(26% Off $46.34)
Part # 9-43051 ValueShip™ Eligible
Hurry! Only 1 left in stock
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Fits: Mercury OB V-6
 
Mallory Thermostat Kit 9-43052
Summer Sale Price: $19.88
Save: $7.41
(27% Off $27.29)
Part # 9-43052
Hurry! Only 1 left in stock
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Mercury Thermostat Gasket
Mercury Thermostat Gasket
Your Price: $1.57
Save: $0.26
(14% Off $1.83)
Part # 516-39
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    Mercury:
  • 27-850318
Mercury Thermostat Gasket
Mercury Thermostat Gasket
Your Price: $2.77
Save: $0.46
(14% Off $3.23)
Part # 540-24
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    Mercury:
  • 27-879855
Mercury Thermostat Gasket
Mercury Thermostat Gasket
Your Price: $3.27
Save: $0.55
(14% Off $3.82)
Part # 540-27
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    Mercury:
  • 27-43006-8
Thermostat (120 Degree) - Mercury
Your Price: $22.21
Save: $3.70
(14% Off $25.91)
Part # 14586 ValueShip™ Eligible
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Mercury OEM Part Number: 14586
Thermostat Assembly - Mercury
Thermostat Assembly - Mercury
Your Price: $116.50
Save: $19.41
(14% Off $135.91)
Part # 892864T04 ValueShip™ Eligible
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Mercury OEM Part Number: 892864T04
Thermostat Assembly - Mercury
Your Price: $69.27
Save: $11.55
(14% Off $80.82)
Part # 8M0046693 ValueShip™ Eligible
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Mercury OEM Part Number: 8M0046693
Thermostat Cover Gasket - Mercury
Your Price: $1.36
Save: $0.54
(28% Off $1.90)
Part # 62386001 ValueShip™ Eligible
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Mercury OEM Part Number: 62386001
Thermostat Cover Gasket - Mercury
Your Price: $2.21
Save: $0.89
(28% Off $3.10)
Part # 850318 1 ValueShip™ Eligible
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Mercury OEM Part Number: 850318 1
Thermostat Housing Assembly - Mercury
Thermostat Housing Assembly - Mercury
Your Price: $82.71
Save: $13.79
(14% Off $96.50)
Part # 892864T06 ValueShip™ Eligible
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Mercury OEM Part Number: 892864T06
Thermostat, 54 Degree C/130 Degree F - Mercury
Your Price: $76.43
Save: $12.74
(14% Off $89.17)
Part # 8M0057307 ValueShip™ Eligible
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Mercury OEM Part Number: 8M0057307
Thermostat, 60°C (140°F) - Mercury
Your Price: $45.93
Save: $7.65
(14% Off $53.58)
Part # 855676 1 ValueShip™ Eligible
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Mercury OEM Part Number: 855676 1
Thermostat, 62°C (143°F) - Mercury
Your Price: $18.29
Save: $3.04
(14% Off $21.33)
Part # 895338 ValueShip™ Eligible
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Mercury OEM Part Number: 895338
Thermostat, 62°C (143°F) - Mercury
Your Price: $29.50
Save: $4.91
(14% Off $34.41)
Part # 833072003 ValueShip™ Eligible
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Mercury OEM Part Number: 833072003
Thermostat, 62°C (143°F) - Mercury
Your Price: $23.07
Save: $3.84
(14% Off $26.91)
Part # 833072004 ValueShip™ Eligible
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Mercury OEM Part Number: 833072004
Thermostat Kit - 18-43052 - Sierra
Summer Sale Price: $24.18
Part # 18-43052 ValueShip™ Eligible
No Reviews | Write Review | Ask Question
Replaces OEM Part #:
  • Mercury 14586A3
Thermostat Kit - 18-43175 - Sierra
Summer Sale Price: $39.27
Part # 18-43175 ValueShip™ Eligible
No Reviews | Write Review | Ask Question
Replaces OEM Part #:
  • Mercury 855676002
  • Nissan/Tohatsu 3R3-01030-0
Sierra
Thermostat Kits and Thermostats for Mercury Marine
Average Customer Review for Thermostat 120 Degrees - 18-3549 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarJust worked
by Bob from Surrey, British Columbia on March 01, 2013
pretty much just had to fit and work...it did both so i'm happy.
(0 of 1 people found this review helpful)
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Average Customer Review for Thermostat - 18-3553 - Sierra
Full StarFull StarFull StarFull StarHalf Star Based On 4 Reviews | Write Review
Full StarFull StarFull StarFull StarFull StarThermostats - Sierra
by Dave from Martinez, Georgia on July 15, 2014
Mercury running cool short time from the time i ordered till they arrived great price
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarEmpty StarThermostats
by Tim from Winston Salem, North Carolina on November 07, 2013
I ordered the thermostats and water pump kit, they arrived quickly. I'm pleased, will use you again. Thanks
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Full StarFull StarFull StarFull StarFull StarIt fits!
by Bennett from Herriman, Utah on March 20, 2012
It's a thermostat that fits!
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Full StarFull StarFull StarFull StarEmpty StarThermostat
by James from Wilmington, North Carolina on August 11, 2011
I would like to have the rubber washer included with the product. I did not like reusing the old rubber washer. Speedy delivery!
(1 of 1 people found this review helpful)
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Average Customer Review for Thermostat Kit - 18-3569 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull StarSierra Thermostat Kit
by Greg from Redding, California on May 24, 2014
The kit fit like it was made for the motor...which I presumed it was when I bought it :)
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Average Customer Review for Thermostat Kit - 18-3672 - Sierra
Full StarFull StarFull StarFull StarHalf Star Based On 12 Reviews | Write Review
Full StarFull StarFull StarFull StarFull Starmy thermostat kit
by Kenneth from Regina, Kentucky on April 21, 2015
parts was exactly as I ordered and shipped fast as well totally satisfied
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Full StarFull StarFull StarFull StarFull StarThermostat Kit - Sierra
by Kenneth from Humble, Texas on August 21, 2013
Found the part online with no problem. everything I needed was in the package.
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Full StarFull StarFull StarFull StarFull StarNo Problems
by David from Phoenix, Arizona on July 17, 2013
Correct Part and Work Fine
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Full StarEmpty StarEmpty StarEmpty StarEmpty StarOverheated
by Joshua from Camden, New York on June 23, 2013
This thermostat failed to open and my engine overheated. I have never been disappointed with Sierra products until now. Now my engine is running poorly and I'm hoping the head gasket let loose before the rings got cooked. 1973 Evinrude 25HP
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Full StarFull StarFull StarFull StarFull StarYou NEED a Thermostat--Do Not Just Take It OUT
by Raymond from Fort Pierce, Florida on November 13, 2012
Got my part in TWO Days what more could you ask for
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarThermostats
by Joe from Johnsburg, Illinois on October 18, 2012
Solved my cooling problems good quality.
(3 of 3 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarJUST WHAT THE MOTOR ORDERD
by Toby from Costa Mesa, California on November 11, 2011
FIT - WORKS GREAT - FAST SHIPPING
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarJust what I Ordered
by Clifford from Madras, Oregon on October 26, 2011
Exact fit!
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarFollow up to previous review - Mercury 150 outboard
by Anthony from Key Largo, Florida on September 20, 2011
Iboats did provide me a refund for this thermostat kit...took approximately 2 months, but in the end they did come through.
(1 of 1 people found this review helpful)
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Full StarEmpty StarEmpty StarEmpty StarEmpty StarWrong Thermostat Kit for Mercury Outboard
by Anthony from Key Largo, Florida on August 26, 2011
According to the iboat website, this thermostat kit is compatible with my 1993 Mercury 150HP outboard...it isn't! Save yourself the aggravation of water spraying out between the thermostat housing and the valve covers and being told that the parts are not refundable unless they are defective. I'm certain that these thermostat kits do work in some engines, just not in the outboard iboat's website references. Too bad this review does not allow criticism of iboat's customer service... I'm still waiting to see if I'll receive a refund due to their error!
(3 of 3 people found this review helpful)
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Full StarFull StarFull StarEmpty StarEmpty StarNo gasket included
by John from Lancaster, New York on June 23, 2010
This kit does not include a gasket as stated in the discription.
(5 of 5 people found this review helpful)
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Full StarFull StarFull StarFull StarEmpty StarReview for Thermostat Kit for Johnson/Evinrude 310058 434841, Mercury/Mariner 75692, GLM 1
by a Customer on February 02, 2009
(2 of 6 people found this review helpful)
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Average Customer Review for Thermostat Kit - 18-3605 - Sierra
Full StarFull StarFull StarEmpty StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarEmpty StarEmpty StarThermostat kit
by Bob from Carthage, Missouri on April 29, 2013
Kit came with rubber grommets but wrong gasket for opti 135. Good price for the set though.
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