Refine Parts List
HP/Cyl:
Year:

HP/Cyl

Year

O-Ring Application

O.E. #

Sierra O-Ring

Mallory O-Ring

Inner Diameter- Inches

Width- Inches

QTY Needed

5.5 1959 Lower Crankshaft 303347 18-7180 (5)9-76556 0.445 0.09 1
9.5 1964-1973 Upper Crankshaft 309731 18-7156 (5)-1.185 0.1 1
18 1957-1972 Crankcase Head 302540 18-7114 (5)-1 0.135 1
18 1957-1976 Large Lower Crankshaft 302537 18-7164 (5)-1.375 0.1 1
18 1971-1976 Upper Crankshaft 302537 18-7164 (5)-1.375 0.1 1
20 (1)1977 Lower Crankshaft -18-7174 9-76553 --1
20 (1)1979-1990 Lower Crankshaft -18-7174 9-76553 --1
20 1990-1995 Crankcase Head Outer 554545 18-7146 (5)9-76539 1.12 0.1 1
25 1957-1976 Large Lower Crankshaft 302537 18-7164 (5)-1.375 0.1 1
25 (1)1977 Lower Crankshaft -18-7174 9-76553 --1
25 (1)1979-1990 Lower Crankshaft -18-7174 9-76553 --1
25 1990-1995 Crankcase Head Outer 554545 18-7146 (5)9-76539 1.12 0.1 1
25 1957 Crankcase Head 302540 18-7114 (5)-1 0.135 1
35 1969-1976 Crankcase Head 302540 18-7114 (5)-1 0.135 1
25 1971-1976 Upper Crankshaft 302537 18-7164 (5)-1.375 0.1 1
25 1989-1990 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
25 1989-1990 Upper Crankshaft 319662 18-7457 (2)-1.799 0.103 1
25 1978 Lower Crankshaft 303059 18-7134 (5)9-76511 0.5 0.1 1
28 1962-1964 Large Lower Crankshaft 302537 18-7164 (5)-1.375 0.1 1
28 1976-1977 Lower Crankshaft -18-7174 9-76553 --1
28 1979-1990 Lower Crankshaft -18-7174 9-76553 --1
28 1990-1995 Crankcase Head Outer 554545 18-7146 (5)9-76539 1.12 0.1 1
30 1976-1977 Lower Crankshaft -18-7174 9-76553 --1
30 1979-1990 Lower Crankshaft -18-7174 9-76553 --1
30 1990-1995 Crankcase Head Outer 554545 18-7146 (5)9-76539 1.12 0.1 1
33 1957-1975 Large Lower Crankshaft 554545 18-7164 (5)-1.12 0.1 1
35 1978 Lower Crankshaft 303059 18-7134 (5)9-76511 0.5 0.1 1
35 1976-1977 Lower Crankshaft -18-7174 9-76553 --1
35 1979-1990 Lower Crankshaft -18-7174 9-76553 --1
35 1990-1995 Crankcase Head Outer 554545 18-7146 (5)9-76539 1.12 0.1 1
35 1957-1975 Large Lower Crankshaft 554545 18-7164 (5)-1.12 0.1 1
35 1987 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
35 1987 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
40 (1)1976 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
40 (1)1981-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
40 1957-1975 Large Lower Crankshaft 554545 18-7164 (5)-1.12 0.1 1
40 (1)1976 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
40 (1)1981-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
45 (1)1976 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
45 (1)1981-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
45 (1)1985-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
45SS (1)1985-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
45SS 1987-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
48 1987-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
48 (1)1971-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
50 (1)1971-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
50 1958-1959 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 1
50 (1)1968-1990 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
55 (1)1971-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
55 (1)1968-1990 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
55 1968-1971 Crankcase Head Outer 303360 18-7117 (2)9-76507 1.06 0.135 1
60 1968-1971 Crankcase Head Outer 303360 18-7117 (2)9-76507 1.06 0.135 1
60 1960-1968 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 2
60 1970-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
60 1989-1990 Lower Crankshaft 310967,310585 18-7158 (5)9-76543 0.74 0.1 1
60 1970-1971 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
60 1981-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
SST60 1970-1971 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
SST60 1981-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
SST60 1989-1990 Lower Crankshaft 310967,310585 18-7158 (5)9-76543 0.74 0.1 1
SST60 1970-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
65 (1)1972-1973 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
65 (1)1985-1995 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
65 (1)1972-1973 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
65 (1)1985-1995 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
65 (1)1989-1990 Lower Crankshaft 310967,310585 18-7158 (5)9-76543 0.74 0.1 1
65 1960-1968 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 2
70 (1)1989-1990 Lower Crankshaft 310967,310585 18-7158 (5)9-76543 0.74 0.1 1
70 1974-1990 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
70 1974-1990 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
75 1975-1988 Upper Crankshaft 313754 18-7128 (2)9-76532 1.835 0.1 1
75 1975-1988 Crankcase Head 308876 18-7123 (2)-2.235 0.1 1
75 1960-1968 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 2
80 1960-1968 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 2
85 1968-1980 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
88 (1)1964 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
88 (1)1981-1995 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
90 (1)1964 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
90 (1)1981-1995 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
100 (1)1964 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
100 (1)1981-1995 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
100 1966 Crankcase Head Screw 307853 18-7120 (2)9-76526 0.215 0.065 4
110 1969-1995 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
115 1969-1995 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
125 1971-1984 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
135 1971-1984 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
140 1971-1984 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
150 (1)1977-1990 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
155 (1)1977-1990 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
175 (1)1977-1990 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
185 1976-1985 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
200 1976-1985 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
235 1976-1985 Crankcase Head 322119 18-7133 (5)9-76529 3.94 0.135 4
V-4 1969-1971 Crankcase Head Outer 303360 18-7117 (2)9-76507 1.06 0.135 1

HP/Cyl

Year

O-Ring Application

O.E. #

Sierra O-Ring

Mallory O-Ring

Inner Diameter- Inches

Width- Inches

QTY Needed

Notes:
  • (1) : Commercial Models Only
  • (2) : PKG. OF 1
  • (5) : PKG. OF 5
Refine Parts List
HP/Cyl:
Year:
Price: $3.72
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Part # 18-7114-9
2nd Day Air for $2 More Eligible
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Price: $0.77
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Part # 18-7117
2nd Day Air for $2 More Eligible
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Price: $1.01
Part # 18-7120
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Part # 18-7123
2nd Day Air for $2 More Eligible
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Price: $3.71
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Part # 18-7128
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Price: $8.62
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Part # 18-7133-9
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Part # 18-7134-9
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Part # 18-7146-9
2nd Day Air for $2 More Eligible
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Part # 18-7156-9
2nd Day Air for $2 More Eligible
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Part # 18-7158-9
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Hurry! Only 1 left in stock
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Part # 18-7164-9
2nd Day Air for $2 More Eligible
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Part # 18-7174-9
2nd Day Air for $2 More Eligible
Johnson / Evinrude / OMC 303347 replacement parts
Price: $9.03
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Part # 18-7180-9
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Price: $1.00
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Part # 18-7457
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Sierra
Average Customer Review for O-Ring - 18-7114-9 - Sierra
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18-7114-9 o'ring.
by Richard from Monroe, Michigan on December 09, 2012
Better than original. Thank you.
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o-ring
by Gary from Smithtown, New York on June 06, 2012
turned out, I did not really need this part
(0 of 2 people found this review helpful)
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Average Customer Review for Powerhead O-Ring - 18-7134-9 - Sierra
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worked well
by Jeffrey from Hermantown, Minnesota on August 27, 2012
Arrived quickly. No problems.
(1 of 2 people found this review helpful)
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Average Customer Review for O-Ring - 18-7174-9 - Sierra
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Spot on
by David from Ballston Spa, New York on May 04, 2016
Perfect fit
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