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Johnson Thermostats

Refine Parts List
HP

(5 to 250)
Years

(1959 to 2006)

HP

Years

Sierra Thermostat

Mallory Thermostat

Sierra Thermostat Kit

Mallory Thermostat Kit

51965-196818-3543 9-4301918-3672 9-43101
5198618-3543 9-4301918-3672 9-43101
5.51959-196418-3543 9-4301918-3672 9-43101
61965-197918-3543 9-4301918-3672 9-43101
6198618-3543 9-4301918-3672 9-43101
7.51980-198618-3543 9-4301918-3672 9-43101
8198618-3543 9-4301918-3672 9-43101
9.51964-197318-3543 9-4301918-3672 9-43101
9.91974-198618-3543 9-4301918-3672 9-43101
101959-196318-3543 9-4301918-3672 9-43101
151974-198618-3543 9-4301918-3672 9-43101
181959-197318-3543 9-4301918-3672 9-43101
201981-199418-3543 9-4301918-3672 9-43101
25(2)1969-199418-3543 9-4301918-3672 9-43101
281989-199418-3543 9-4301918-3672 9-43101
301986-199418-3543 9-4301918-3672 9-43101
35195918-3543 9-4301918-3672 9-43101
351976-199418-3543 9-4301918-3672 9-43101
401960-196918-3543 9-4301918-3672 9-43101
451989-1992(4)18-3543 9-4301918-3672 9-43101
501971-197518-3543 9-4301918-3672 9-43101
50197918-3543 9-4301918-3672 9-43101
501981-198618-3543 9-4301918-3672 9-43101
551976-1992(3)18-3543 9-4301918-3672 9-43101
601969-197018-3557 9-43024 18-3669 -
601980-198618-3543 9-4301918-3672 9-43101
60, 60TTL199318-3561 9-43023 --
651971-197318-3557 9-43024 18-3669 -
65199318-3561 9-43023 --
65C1984-198618-3557 9-43024 18-3669 -
65 Jet1994-199518-3543 9-4301918-3673 -
701974-198618-3557 9-43024 18-3669 -
70, 70TTL199318-3561 9-43023 --
751978-198818-3557 9-43024 18-3669 -
80 Jet1994-199518-3543 9-4301918-3673 -
851978-198018-3543 9-4301918-3673 -
851993-199518-3543 9-4301918-3673 -
881987-199518-3543 9-4301918-3673 -
90(1)1983-199518-3543 9-4301918-3673 -
902004-200618-3544 ---
90 Jet199418-3543 9-4301918-3673 -
1001979-198018-3543 9-4301918-3673 -
1001990-199518-3543 9-4301918-3673 -
100 Comm1984-199518-3543 9-4301918-3673 -
105200318-3544 ---
1101985-198918-3543 9-4301918-3673 -
1121994-199518-3543 9-4301918-3673 -
115(1)1978-199518-3543 9-4301918-3673 -
1152002-200618-3544 ---
1401978-198518-3543 9-4301918-3673 -
1501978-199118-3543 9-4301918-3672(5) 9-43101
1501993-199418-3544 ---
1502002-200618-3544 ---
1551984-199118-3543 9-4301918-3672(5) 9-43101
1751977-199118-3543 9-4301918-3672(5) 9-43101
175199418-3544 ---
1752002-200618-3544 ---
1851984-198518-3543 9-4301918-3672(5) 9-43101
2001977-198318-3543 9-4301918-3672(5) 9-43101
2002000-200118-3546 ---
2252000-200118-3546 ---
2351978-198518-3543 9-4301918-3672(5) 9-43101
2502000-200118-3546 ---

HP

Years

Sierra Thermostat

Mallory Thermostat

Sierra Thermostat Kit

Mallory Thermostat Kit

Notes:
(1) : Except 60 degree models
(2) : All 1989-91 models except DR & DT
(3) : Commercial also
(4) : Commercial
(5) : For complete Thermostat Kit including gaskets & spring use 18-3674
Refine Parts List
HP

(5 to 250)
Years

(1959 to 2006)
Blowout
Save 40%-49% Off.
Your Price: $19.98
Save: $6.51
(24% Off $26.49)
Part # 18-3500 ValueShip™ Eligible
140 Degree

For:
  • 3 Cyl. (1992 & Up)
  • 90 Degree (1990-1992)
Replaces OEM part #
  • OMC 434137
Your Price: $17.61
Save: $9.71
(35% Off $27.32)
Part # 18-3543 ValueShip™ Eligible
    Replaces OEM #: 5005440, 508626, 378065, 434841 and 393659
Your Price: $20.35
Save: $8.19
(28% Off $28.54)
Part # 18-3557 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
1" - 143 Degree

Replaces OEM part #
  • CHRYSLER FORCE F335068
  • OMC 382385
  • OMC 396987
  • MERCURY MARINE 47594
Thermostat for Johnson/Evinrude 436195, GLM 13150 - Sierra
Your Price: $10.99
Save: $4.42
(28% Off $15.41)
Part # 18-3561 ValueShip™ Eligible
143 Degree

Replaces OEM part #
  • OMC 436195
Fall Sale Price: $16.87
Save: $11.67
(40% Off $28.54)
Part # 9-43024 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces Original Equipment Manufacturer(OEM):CHRYSLER FORCE
Replaces Original Equipment Manufacturer # (OEM #):F335068
Mallory Thermostat 9-43023
Fall Sale Price: $9.16
Save: $6.25
(40% Off $15.41)
Part # 9-43023 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces Original Equipment Manufacturer(OEM):Johnson/Evinrude
Replaces Original Equipment Manufacturer # (OEM #):436195
Mallory Thermostat 9-43030
Fall Sale Price: $13.94
Save: $13.85
(49% Off $27.79)
Part # 9-43030 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces Original Equipment Manufacturer(OEM):Johnson/Evinrude
Replaces Original Equipment Manufacturer # (OEM #):5001036
Your Price: $16.72
Save: $9.68
(36% Off $26.40)
Part # 18-3544 ValueShip™ Eligible
Replaces: J/E 435491

Fits:

  • E100 (2004-2006)
  • E115 (2002-2006)
  • E75 (2002-2003)
  • E90 (2002-2003)
  • E150 (1993-1994)
  • E175 (1993-1994)
  • J105 (2003)
  • J115 (2002-2006)
  • J150 (1993-1994, 2002-2006)
  • J175 (1994, 2002-2006)
  • J90 (2004-2006)
Your Price: $16.26
Save: $10.06
(38% Off $26.32)
Part # 18-3545 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces: J/E 437090

Fits:

  • E115 (1997)
  • E135 (2000-2006)
  • E150 (2000-2006)
  • E175 (2000-2006)
Your Price: $17.95
Save: $11.30
(38% Off $29.25)
Part # 18-3546 ValueShip™ Eligible
No Reviews  |  Write Review  |  Ask Question
Replaces: J/E 5001036 Fits:
  • E200 (2000-2005)
  • E225 (2000-2005)
  • E250 (2000-2005)
  • J200 (2000-2001)
  • J225 (2000-2001)
  • J250 (2000-2001)
Sierra
Average Customer Review for Thermostat - 18-3500 - Sierra
Full StarFull StarFull StarFull StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty StarThermostate
by William from Englewood, Florida on April 19, 2012
Good item should have direction,which way it should face
(2 of 3 people found this review helpful)
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Average Customer Review for Thermostat - 18-3543 - Sierra
Full StarFull StarFull StarFull StarFull Star Based On 4 Reviews | Write Review
Full StarFull StarFull StarFull StarFull StarThermostat for 1979 Johnson 55 HP
by Dan from Lansing, Illinois on July 27, 2015
Perfect fit! I did test the outlet water temperature in the yard via garden hose muffs. Tested fine. Yesterday, I took the boat to a cooling lake for one of Com Eds nuclear power plants. Tested great. Surface temperatures were from 96F-103F!
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Full StarFull StarFull StarFull StarFull Starthermostat
by Mike from Marlton, New Jersey on April 26, 2015
what can I say its a thermostat rite size well built
(1 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarThermostat
by Charles from Suffolk, Virginia on June 02, 2014
Outstanding product
(2 of 2 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarGOOD PRODUCT
by Charles from Suffolk, Virginia on May 12, 2014
I love this website
(2 of 2 people found this review helpful)
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Average Customer Review for Thermostat - 18-3561 - Sierra
Full StarFull StarFull StarFull StarEmpty Star Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarEmpty StarFine for what I ordered
by Thomas from Hampton, New Hampshire on June 15, 2015
Did not actually install but it's what I ordered. No complaints.
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Average Customer Review for Thermostat - 18-3544 - Sierra
Full StarFull StarFull StarFull StarHalf Star Based On 3 Reviews | Write Review
Full StarFull StarFull StarFull StarEmpty StarGood Product
by Justin from Chandler, Arizona on April 05, 2015
These fit and work just fine on my 96 johnson.
(0 of 1 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Starhaven't tried my boat out since replacing these part's
by Charles from Antioch, Tennessee on February 15, 2012
I'll let you know later this week...thank's
(1 of 5 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Star18-3544 Thermostat
by Emory from Cartersville, Georgia on June 15, 2011
Great part
(2 of 5 people found this review helpful)
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Q:
Does it come with rubber seal and gasket?
A:
It is the thermostat only.
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