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:
Your Price: $3.72
Save: $8.73
(70% Off $12.45)
Part # 18-7114-9 2nd Day Air for $2 More Eligible
Dimensions ( in )
I.D. 1.000
Width: .135

Replaces OEM part #
  • MERCURY MARINE 25-23145
  • OMC 302540
Your Price: $0.93
Save: $1.06
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Part # 18-7117 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. 1.060
Width: .135

Replaces OEM part #
  • OMC 303360
  • MERCURY MARINE 25-35027
Your Price: $1.01
Part # 18-7120 2nd Day Air for $2 More Eligible
Dimensions ( in )
I.D. .215
Width .065

Replaces OEM part #
  • CHRYSLER FORCE 25-F498618
  • OMC 332584
  • OMC 307853
  • MERCURY MARINE 25-38933
  • OMC 332598
Your Price: $1.82
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Part # 18-7123 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. 2.235
Width .100

Replaces OEM part #
  • OMC 308876
Your Price: $3.71
Save: $0.28
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Part # 18-7128 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. 1.835
Width .100

Replaces OEM part #
  • OMC 313754
Your Price: $8.62
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Part # 18-7133-9 2nd Day Air for $2 More Eligible
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Dimensions( in )
I.D. 3.780
Width .135

Replaces OEM part #
  • OMC 322119
  • OMC 305123
Your Price: $4.16
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Part # 18-7134-9 2nd Day Air for $2 More Eligible
Dimensions ( in )
I.D. .500
Width .100

Replaces OEM part #
  • CHRYSLER FORCE 25-F40342
  • OMC 303059
  • MERCURY MARINE 25-F40342
Your Price: $7.53
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Part # 18-7146-9 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. 1.120
Width .100

Replaces OEM part #
  • OMC 554545
  • MERCURY MARINE 25-47632
Your Price: $6.83
Save: $8.12
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Part # 18-7156-9 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. 1.185
Width .100

Replaces OEM part #
  • OMC 309731
  • MERCURY MARINE 25-29439
Your Price: $3.94
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Part # 18-7158-9 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. .740
Width .100

Replaces OEM part #
  • OMC 310585
  • MERCURY MARINE 25-30613
  • OMC 310967
Your Price: $7.25
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Part # 18-7164-9 2nd Day Air for $2 More Eligible
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Dimennsions ( in )
I.D. 1.375
Width .100

Replaces OEM part #
  • OMC 302537
  • MERCURY MARINE 25-33466
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Part # 18-7174-9 2nd Day Air for $2 More Eligible
Hurry! Only 1 left in stock
Dimensions ( in )
I.D. .620
Width .100

Replaces OEM part #
  • OMC 326649
  • OMC 910582
  • MERCURY MARINE 25-45711
Johnson / Evinrude / OMC 303347 replacement parts
Your Price: $8.80
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Part # 18-7180-9 2nd Day Air for $2 More Eligible
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Dimensions ( in )
I.D. .445
Width .090

Replaces OEM part #
  • OMC 303347
  • MERCURY MARINE 25-26802
  • VOLVO 925055-6, Dimensions (mm) I.D. 11.3, Width 2.4
Your Price: $1.00
Save: $0.49
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Part # 18-7457 2nd Day Air for $2 More Eligible
Hurry! Only 1 left in stock
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Dimensions ( in )
I.D. 1.799
Width .103

Replaces OEM part #
  • CHRYSLER FORCE 25-F45530
  • OMC 319662
Sierra
Average Customer Review for O-Ring - 18-7114-9 - Sierra
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
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
Full StarFull StarFull StarFull StarFull Star
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Full StarFull StarFull StarFull StarFull Star
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
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
Spot on
by David from Ballston Spa, New York on May 04, 2016
Perfect fit
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