page 162
PARTS
OMC
OMC
RINGS
Wiseco Piston
Replacement Rings are
available from PRO Marine.
To get the ring part number,
take the bore size and add
"KD" after the number.
Example:
3.520" = 3520KD
All Wiseco Outboard
Rings
PRO Rings are made
from high strength
ductile materials to
prevent breaking
from detonation.
Model
Cyl
Bore
STD
.020
.030
.040
Size
Ring
Ring
Ring
Ring
5-8 HP
2
18-3972
-
18-3973
-
9.9-15 HP 1974-93
2
2.188
8400
8420
8430
9.9-15 HP 1993-UP
2
2.375
5218
6360
20 HP 1981-95
2
3.000
8200
8220
8230
25 HP 1977-95
28 HP1986-88, 1990,
1991, 1995
30 HP 1984-95
35 HP 1976-95
j
40 HP 1975-92
2
3.187
8300
8320
8330
48 HP 1987-92
50 HP 1981-92
55 HP 1976-92
60 HP 1980-85
40, 50, 60 HP 1995 & later
k
2
3.187
2955
2959
2956
40, 48, 50 HP 1992-93
3
3.187
8300
8320
8330
60, 70 HP 1991
j
60 HP 1986-88
3
3.00
8200
8220
8230
65 Comm 1984-86
70 HP 1975-85
75 HP 1975-88
40, 48, 50 HP 1995-UP
3
3.187
2955
2959
2956
60 HP 1995-UP
70 HP 1994-Up
k
60 HP 1989-94
3
3.187
8300
8320
8330
65 Comm 1987-94
70 HP 1986-94
j
85-115 HP 1973-97
m
4
3.500
3904
3920
3905
3940
Crossflow
90-115 HP 60
o
& Ficht FFI 1995-UP
k
4
3.600
6353
2958
2957
120 HP 1985-87 Small Bore
4
3.50
3904
3920
3905
3940
125 HP 1971-72 Small Bore
135 HP 1973-76 Small Bore
140 HP 1977-87 Small Bore
120 HP 1988-92 Big Bore
4
3.685
870
875
2950
140 HP 1988-92 Big Bore
l
j
Part #'s 8300, 8320, 8330 have a 30 degree taper on the top ring only.
k
Part #'s 254, 2955, 2959, 2956, 6353 have a 7 degree taper on both rings.
l
Part #'s 3096, 870, 2950 have a 7 degree taper on the top ring and a rectangular bottom ring.
m
Part #'s 3904, 3905, 3920, 3940 have a 30 degree taper on the top ring and a rectangular bottom ring
OMC RINGS
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