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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
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Price: $19.59
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Part # 18-3500
2nd Day Air for $2 More Eligible
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Part # 18-3543
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Part # 18-3557
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Thermostat for Johnson/Evinrude 436195, GLM 13150 - Sierra
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Part # 18-3561
2nd Day Air for $2 More Eligible
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Part # 18-3544
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Part # 18-3545
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Part # 18-3546
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Sierra
Average Customer Review for Thermostat - 18-3500 - Sierra
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Thermostate
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
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Thermostat 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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thermostat
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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Thermostat
by Charles from Suffolk, Virginia on June 02, 2014
Outstanding product
(2 of 2 people found this review helpful)
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GOOD 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
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Fine 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
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Good 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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haven'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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18-3544 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.


Q:
Johnson outboard M# J115PL4ST, will this thermostat work on my outboard?
A:
This one will not fit your motor. It will depend on whether you need the 60 degree C or 71 degree. Part number 5033721 is for the 60 and 5033722 is for the 71.


Q:
Do these work on 1999 J90PLEEB?
A:
Yes this is the thermostat for your engine.


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