Johnson Thermostats

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HP

Years

Sierra Thermostat

Sierra Thermostat Kit

5 1965-1968 18-3543 18-3672
5 1986 18-3543 18-3672
5.5 1959-1964 18-3543 18-3672
6 1965-1979 18-3543 18-3672
6 1986 18-3543 18-3672
7.5 1980-1986 18-3543 18-3672
8 1986 18-3543 18-3672
9.5 1964-1973 18-3543 18-3672
9.9 1974-1986 18-3543 18-3672
10 1959-1963 18-3543 18-3672
15 1974-1986 18-3543 18-3672
18 1959-1973 18-3543 18-3672
20 1981-1994 18-3543 18-3672
25 (2)1969-1994 18-3543 18-3672
28 1989-1994 18-3543 18-3672
30 1986-1994 18-3543 18-3672
35 1959 18-3543 18-3672
35 1976-1994 18-3543 18-3672
40 1960-1969 18-3543 18-3672
45 1989-1992 (4)18-3543 18-3672
50 1971-1975 18-3543 18-3672
50 1979 18-3543 18-3672
50 1981-1986 18-3543 18-3672
55 1976-1992 (3)18-3543 18-3672
60 1969-1970 18-3557 18-3669
60 1980-1986 18-3543 18-3672
60, 60TTL 1993 18-3561 -
65 1971-1973 18-3557 18-3669
65 1993 18-3561 -
65C 1984-1986 18-3557 18-3669
65 Jet 1994-1995 18-3543 18-3673
70 1974-1986 18-3557 18-3669
70, 70TTL 1993 18-3561 -
75 1978-1988 18-3557 18-3669
80 Jet 1994-1995 18-3543 18-3673
85 1978-1980 18-3543 18-3673
85 1993-1995 18-3543 18-3673
88 1987-1995 18-3543 18-3673
90 (1)1983-1995 18-3543 18-3673
90 2004-2006 18-3544 -
90 Jet 1994 18-3543 18-3673
100 1979-1980 18-3543 18-3673
100 1990-1995 18-3543 18-3673
100 Comm 1984-1995 18-3543 18-3673
105 2003 18-3544 -
110 1985-1989 18-3543 18-3673
112 1994-1995 18-3543 18-3673
115 (1)1978-1995 18-3543 18-3673
115 2002-2006 18-3544 -
140 1978-1985 18-3543 18-3673
150 1978-1991 18-3543 18-3672
150 1993-1994 18-3544 -
150 2002-2006 18-3544 -
155 1984-1991 18-3543 18-3672
175 1977-1991 18-3543 18-3672
175 1994 18-3544 -
175 2002-2006 18-3544 -
185 1984-1985 18-3543 18-3672
200 1977-1983 18-3543 18-3672
200 2000-2001 18-3546 -
225 2000-2001 18-3546 -
235 1978-1985 18-3543 18-3672
250 2000-2001 18-3546 -

HP

Years

Sierra Thermostat

Sierra Thermostat Kit

Notes:
  • (1) : Except 60 degree models
  • (2) : All 1989-91 models except DR & DT
  • (3) : Commercial also
  • (4) : Commercial
Refine Parts List
HP :
Years :
Blowout
Save 28%-41% Off.
Limited Sale Price: $19.59
Save: $7.72
(28% Off $27.31)
Part # 18-3500 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 10 hrs 32 mins.
140 Degree

For:
  • 3 Cyl. (1992 & Up)
  • 90 Degree (1990-1992)
Replaces OEM part #
  • OMC 434137
Limited Sale Price: $16.74
Save: $10.58
(38% Off $27.32)
Part # 18-3543 ValueShip™ Eligible
    Replaces OEM #: 5005440, 508626, 378065, 434841 and 393659
Limited Sale Price: $19.54
Save: $9.29
(32% Off $28.83)
Part # 18-3557 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 10 hrs 32 mins.
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
Limited Sale Price: $10.54
Save: $5.03
(32% Off $15.57)
Part # 18-3561 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 10 hrs 32 mins.
143 Degree

Replaces OEM part #
  • OMC 436195
Limited Sale Price: $16.36
Save: $10.84
(39% Off $27.20)
Part # 18-3544 ValueShip™ Eligible

Replaces OE#:

  • Johnson Evinrude 435491
  • Johnson Evinrude 437090

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)
Limited Sale Price: $15.60
Save: $10.99
(41% Off $26.59)
Part # 18-3545 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 10 hrs 32 mins.
No Reviews  |  Write Review  |  Ask Question
Replaces: J/E 437090

Fits:

  • E115 (1997)
  • E135 (2000-2006)
  • E150 (2000-2006)
  • E175 (2000-2006)
Limited Sale Price: $17.41
Save: $12.46
(41% Off $29.87)
Part # 18-3546 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 10 hrs 32 mins.
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
(3 of 4 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.
(0 of 1 people found this review helpful)
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Average Customer Review for Sierra 18-3544 Thermostat
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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