Marine Engine (Inboard)

FORD (AUST. & USA)

18mm Head (Gasket Seat)

Model	Year	Standard Plug	Gap (mm)
		M17	0.8

Falcon conversion 6 Cyl. 144c.i.-221c.i.

Model	Year	Standard Plug	Gap (mm)
		MA16P-U	0.9

Falcon 250c.i. Non X Flow

Model	Year	Standard Plug	Gap (mm)
		MA20PR-U	0.9

Falcon 250c.i. X Flow Iron Head

Model	Year	Standard Plug	Gap (mm)
		T20PR-U	0.9

Falcon 250c.i. X Flow Alloy Head

Model	Year	Standard Plug	Gap (mm)
		W20EPR-U	0.9

Falcon 302c, 351c Cleveland-14mm Taper Seat

Model	Year	Standard Plug	Gap (mm)
		T20PR-U	0.9

Falcon 302w, 351w Windsor-14mm Taper Seat

Model	Year	Standard Plug	Gap (mm)
		T20PR-U	0.8

Falcon 302w, 351w Windsor-18mm Taper Seat

Model	Year	Standard Plug	Gap (mm)
		MA20PR-U	0.8

OHV 272, 292 cu.in. V8 312 c.i.

Model	Year	Standard Plug	Gap (mm)
		MA20P-U	0.8

V8 Side Valve (Mercury, Customs)

Model	Year	Standard Plug	Gap (mm)
		W16LS	0.8

67, 98 cu.in.

Model	Year	Standard Plug	Gap (mm)
		W20EPR-U	0.8

104 cu.in.

Model	Year	Standard Plug	Gap (mm)
		W16EPR-U	0.8

158, 201 cu.in.

Model	Year	Standard Plug	Gap (mm)
		W20ES-U	0.8

172 cu.in.

Model	Year	Standard Plug	Gap (mm)
		W16LS	0.8

250 cu.in.

Model	Year	Standard Plug	Gap (mm)
		MA20R-U	0.9

302, 351, 460 cu.in.

Model	Year	Standard Plug	Gap (mm)
	1975-89	T16PR-U	0.9

302, 351W, 427 cu.in.

Model	Year	Standard Plug	Gap (mm)
	to 1974	MA20R-U	0.9

427, 429 cu.in.

Model	Year	Standard Plug	Gap (mm)
	1975-89	T16PR-U	0.9

460 c.i. 14mm TaperSeat

Model	Year	Standard Plug	Gap (mm)
		T16PR-U	0.9

477 cu.in.

Model	Year	Standard Plug	Gap (mm)
	to 1976	MA20R-U	0.9
	1977-81	MA20R-U	0.9

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