OMC STERNDRIVE/COBRA
Ignition System
PKG. OF 10
PKG. OF 10
18-5750-9➌
18-5224-9➌
UNIVERSAL SPARK PLUG BOOTS
SPARK PLUG WIRE TERMINAL
UNIVERSAL
SPARK PLUG BOOT
Replaces: Mercury 20121
Supplied complete w/Terminal Connector
Replaces: OMC 581027, 580339
OMC 510364
8mm
PREMIUM MARINE SPARK PLUG WIRE LEADS
Premium Marine Wire Leads
Magnetic Suppression Core
Manufactured for your specific application
★ Kevlar® core for maximum durability and long life.
★ Durable stainless steel wound conductor
for maximum horsepower and engine performance.
★ Premium silicone jacketing and boots for
the ultimate in high temperature protection.
★ Superior RFI suppression for the most sensitive
electronic system.
★ Corrosion resistant stainless steel spark
OE style boots provide a sealed barrier
plug and distributor terminals for maximum conductivity.
against heat, dirt and moisture.
Model
Ignition Type
Cyl.
O.E.M. #
Part #
2.3L
Conventional
4
503747
18-8807-1
100/ 110/ 120/ 2.5L/ 140/ 3.0L/ 140 Jet
Conventional
4
503748
18-8800-1
3.0L/ HO
EST Electronic
4
503749
18-8814-1
3.0L/ HO
EST Electronic
4
503749
18-8811-1
3.0L/ HO
EST Electronic
4
503749
18-8841-1
4.3L
EST Electronic
6
503751
18-8810-1
3.8L/ 4.3L
Conventional
6
503750
18-8801-1
370 (King Cobra)/ 454/ 7.4L/ 502/ 8.2L
Conventional
8
503752, 503755
18-8803-2
175/ 185/ 190/ 200/ 5.0L - 5.7L (GM)
Conventional
8
503752, 503755 ➀
18-8803-2, 18-8823-1
➀
225/ 230/ 235/ 240/ 250/ 260
Conventional
8
503752, 503755 ➀
18-8803-2, 18-8823-1
➀
5.0L - 5.8L EFI (Ford)
EST Electronic
8
503754
18-8820-1
5.0L - 5.8L (Ford)
Conventional
8
503753
18-8842-1
460 (King Cobra)
Conventional
8
N/A
18-8825-1
8.1L / 496
Distributorless
8
18-8838-1
7.4L / 8.2L V8
DDS
8
503756
18-8843-1
Models with Mallory side terminal caps
➀
Engine
Cyl.
Year
Kit
Engine
Cyl.
Year
Kit
185
8
1978-80
18-8802-1
2.3L
4
1987-90
18-8807-1
190
8
1975-77
18-8805-1
2.5L
4
1982-86
18-8800-1
➂
200
8
1979-81
18-8802-1
3.0L
4
1982-90
18-8800-1
➇
225
8
1978
18-8802-1
3.0L/3.0L H.O.
4
1991-92
18-8814-1
225
8
1976
18-8802-1
3.0L/3.0L H.O.
4
1990-94
18-8841-1
➃
➉
230
8
1979-81
18-8802-1
2.5/3.0L 110-140hp➉
4
1964-90
18-8811-1
230 IB LH
8
1976
18-8802-1
3.8L
V6 1981-86
18-8801-1
230 IB LH
8
1976
18-8802-1
4.3L
V6 1985-90
18-8801-1
➈
235
8
1975-77
18-8805-1
4.3L
V6 1994
18-8810-1
➉
240
8
1978
18-8805-1
5.0L
8
1982-88
18-8802-1
250
8
1979
18-8805-1
5.0L
8
1989-90
18-8806-1
260
8
1979-81
18-8802-1
5.7L
8
1982-89
18-8802-1
➄
SPARK PLUG WIRE SETS
260 IB LH
8
1976
18-8802-1
5.7L King Cobra
8
1988
18-8802-1
8mm
260 IB LH
8
1976
18-8802-1
5.8L
8
1989-90
18-8842-1
262 King Cobra
V6
1989
18-8801-1
8
1991
18-8843-1
7.4L
1974:FF and R only
➋
➀
305 CID IB LH
8
1979-82
18-8802-1
7.4L/8.2L
8
1992-94
18-8843-1
1974:Model R1 only
➅
➁
305 CID IB RH
8
1977-82
18-8802-1
7.5L
8
1987
18-8803-2
1975:Model A1 only
➄
➂
305 CID IB RH
8
1979-82
18-8802-1
7.5L King Cobra
8
1987
18-8803-2
Model M only
➆
➃
305 CID IB LH
8
1977-82
18-8802-1
80
4
1968-69
18-8800-1
Models w/o closed cooling
➄
➄
350 CID IB RH
8
1977-82
18-8802-1
100
4
1972-73
18-8800-1
V-Drive model w/ closed cooling
➄
➅
350 CID IB RH
8
1979-82
18-8802-1
110
4
1964
18-8800-1
Direct Drive Model w/ closed cooling
➆
➆
350 King Cobra
8
1989
18-8802-1
120
4
1965-74
18-8800-1
1990 Models 302BMRPWS and
➀
➇
370 King Cobra
8
1988
18-8803-2
120
4
1974-81
18-8800-1
302BPRPWS
➁
454 CID IB
8
1979-82
18-8802-1
140
4
1973-74
18-8800-1
1990 (2 BBL) carb
➀
➈
460 King Cobra
8
1988-89
18-8803-2
140
4
1974-81
18-8800-1
Delco Digital & EST Ignition
➁
➉
8.1L / 496
8
2000 & up
18-8838-1
140 Jet
4
1973
18-8800-1
Distributorless Ignition
➊
➊
175
8
1975-77
18-8805-1
F suffix models only
➂
➋
➌ Priced per Package
753
