Marine Engine (Inboard)

OMC

Turbojet 90

Model	Year	Standard Plug	Gap (mm)
Jet Drive		W22FSR	0.8

Turbojet 115

Model	Year	Standard Plug	Gap (mm)
Jet Drive		W22FSR	0.8

1.6L 115-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-91	W22FSR	0.8

1.8L 140-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-91	W22FSR	0.8

2.0L 140-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-91	W22FSR	0.8

2.5L

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1981-84	SF10	0.8

2.6L 190-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-88	SF10	0.8

2.7L 225-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1987	W22FSR	0.8

3.0L 225-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-91	W22FSR	0.8

3.6L 275-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1981-87	W22FSR	0.8

4.0L 300-SD

Model	Year	Standard Plug	Gap (mm)
Sea Drive	1985-91	W22FSR	0.8

15S10G

Model	Year	Standard Plug	Gap (mm)
Sail Drive	1997-84	W20FPR-U	1.1

15S10S

Model	Year	Standard Plug	Gap (mm)
Sail Drive	1997-84	W20FPR-U	1.1

15S11C

Model	Year	Standard Plug	Gap (mm)
Sail Drive	1997-84	W20FPR-U	1.1

15S13A

Model	Year	Standard Plug	Gap (mm)
Sail Drive	1997-84	W20FPR-U	1.1

15S14M

Model	Year	Standard Plug	Gap (mm)
Sail Drive	1997-84	W20FPR-U	1.1

All Models

Model	Year	Standard Plug	Gap (mm)
Inboard	1974-82	T20R-U	0.9

AJ, AT, TJ, TT 14mm 3/8” Reach Heads

Model	Year	Standard Plug	Gap (mm)
Inboard		W20S-U	0.9

AJ, AT, TJ, TT 14mm, Tapered Seat

Model	Year	Standard Plug	Gap (mm)
Inboard		T20R-U	0.9

14mm Head Taper Seat

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1973-85	T20PR-U	0.9

14mm Head, 3/4” Rch

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1973-74	W20ES-U	0.9

18mm Head Taper Seat

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1974	MA20PR-U	0.8

CU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20ES-U	0.9

DU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W24S-U	0.8

GU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20ES-U	0.9

HU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20P-U	0.9

JU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		T20R-U	0.9

KU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20S-U	0.9

LU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20ES-U	0.9

Model 480

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W24S-U	0.8

NU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20EP-U	0.6

SU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20ES-U	0.9

TU -14, -15, -16

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20P-U	0.9

TU -17 and up

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20S-U	0.9

TU -20, -21

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		T20R-U	0.9

VU Series

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20ES-U	0.9

WU

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		T20R-U	0.9

XU 20C

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		T20R-U	0.9

XU 20S

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models		W20S-U	0.9

Stinger 4.3L Models

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1978-86	T16R-U	0.9

2.3l Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1987-90	T16EPR-U	1.1

3.0L Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1993-94	T16EPR-U	1.1
Stern Drive All Models	1987-92	T16PR-U	1.1

3.0 HO

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1990-95	T16EPR-U	1.1

4.3L Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1986-95	T20R-U	0.9

4.3L HO

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1993-94	T20R-U	1.1
Stern Drive All Models	1990-91	T16PR-U	0.9

5.0L Cobra Carb

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1986-95	T16PR-U	0.9

5.0L Cobra Carb HO

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1989-95	T16PR-U	0.9

5.0L Cobra EFI

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1993-95	T16EPR-U	1.1

5.7L King Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1986-92	T16PR-U	0.9

5.7L Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1986-92	T16PR-U	0.9

5.7L K

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1993-95	T16PR-U	1.1

5.8L King Cobra EFI HO

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1993-95	T16PR-U	0.9

5.8L Cobra EFI

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1992-95	T16EPR-U	1.1

5.8L Cobra Carb

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1989-95	T16PR-U	0.9

7.4L King Cobra Carb

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1995	T16PR-U	1.1

7.4L King Cobra EFI

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1995	T16PR-U	1.1

7.4L Cobra Carb

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1990-94	T16PR-U	1.1

7.4L Cobra Carb HO

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1991-93	T16PR-U	1.1

7.5L Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1986-90	T16PR-U	0.9

8.2 L King Cobra

Model	Year	Standard Plug	Gap (mm)
Stern Drive All Models	1992-94	T16PR-U	1.1

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