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NGK marine spark plugs information page

NGK Marine Spark Plugs: Everything You Need to Know

NGK Marine Spark Plugs

Welcome to our comprehensive guide on NGK marine spark plugs. Learn everything you need to know about marine spark plugs, including types, parts, and the importance of regular replacement. Explore our NGK marine spark plug charts to find the right spark plug for your boat's engine.

Marine spark plugs are a critical component of your boat's engine. They are responsible for igniting the fuel-air mixture in the combustion chamber, which is what ultimately produces the power that drives your boat.

View our outboard motor spark plugs charts below to find the right spark plug for your motor:

Types of NGK Marine Spark Plugs

NGK marine spark plugs come in a variety of types, including:

  • Standard spark plugs: These are the most common type of marine spark plug. They are made with a copper core and a nickel alloy shell.
  • Platinum spark plugs: These spark plugs have a platinum tip, which makes them more durable and resistant to corrosion.
  • Iridium spark plugs: These spark plugs have an iridium tip, which makes them even more durable and resistant to corrosion.

Parts of a Spark Plug

Parts of a marine spark plugA spark plug is a relatively simple device, but it is made up of several important parts:

  • The insulator: This is the ceramic part of the spark plug that separates the high voltage from the combustion chamber.
  • The center electrode: This is the metal rod that extends into the combustion chamber.
  • The ground electrode: This is the metal disc that is attached to the insulator.
  • The gap: This is the small space between the center electrode and the ground electrode.

 

The Importance of Replacing Your Spark Plugs

Spark plugs wear out over time, and they need to be replaced regularly. The recommended replacement interval for marine spark plugs is typically every 100 hours or 24 months. However, if you operate your boat in harsh conditions, you may need to replace your spark plugs more often.

Symptoms of Bad Spark Plugs

There are a few signs that your spark plugs may be bad, including:

  • Engine misfires
  • Poor fuel economy
  • Rough idle
  • Engine hesitation
  • Black smoke from the exhaust

Marine Spark Plug Cross Reference Chart

Champion Part # NGK Part #
L6VC BUZ8H
L76V BUHW
L77JC4 B7HS-10
L78C B7HS
L78V BUHW-2
L78YC BP7HS
L82C B8HS
QC10PEP PZFR6H
QC10PEPB IZFR6N-E
QC12PEP IZFR6N-E
QC12PEPA PZFR6H
QC12PEPB IZFR6N-E
QL16V BUHXW-1
QL76V BUZHW
QL77CC BR8HS
QL77JC4 BZ7HS-10
QL78C BR9HS-10
QL78V BUZHW-2
QL78YC BPZ8H-N-10
QL78YC BPZ8HS-10
QL82C BR6HS
QL82YC BPR7HS
QL86C BR6HS
QL87YC BPR6HS
RP10HC DR6HS
UL77V BUHXW-1
XC12PEPB PZFR6F-11
AC-Delco Part # NGK Part #
41-932 PZTR5A-15
41-983 PTR4B-15
41-985 IZTR5B11
MR42LTS BPR6EFS
MR43LTS TR5
MR43T BR6FS
MR44T YR5

Outboard Motor Spark Plug Charts

The following tables provide a chart of NGK marine spark plugs for outboard manufacturers and engine models. You can use this chart to find the correct spark plug for your boat's engine.

Evinrude Outboard Motor Spark Plug Chart

Make Model Type Year Gap Standard Resistor
Evinrude 1.6 1.6 L 115-SD   1.0mm (.040") B9HS10 BR9HS10
Evinrude 1.8 1.8 L 140-SD   1.0mm (.040") B9HS10 BR9HS10
Evinrude 2   1975-1980 0.7mm (.028") B6S  
Evinrude 2.6 2.6 L 190-SD   1.0mm (.040") B9HS10 BR9HS10
Evinrude 2.7 2.7 L 225-SD   1.0mm (.040") B9HS10 BR9HS10
Evinrude 3.6 3.6 L 275-SD   1.0mm (.040") B9HS10 BR9HS10
Evinrude 4 CDI 1987- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 4 MAG 1987- 0.6mm (.024") B6HS BR6HS
Evinrude 4   1977-1980 1.0mm (.040") B9HS10 BR9HS10
Evinrude 4   1981-1986 0.6mm (.024") B6HS BR6HS
Evinrude 4.5   1979-1983 1.0mm (.040") B9HS10 BR9HS10
Evinrude 6   1978-1979 0 BUHW2  
Evinrude 6   1984-1986 1.0mm (.040") B9HS10 BR9HS10
Evinrude 7.5   1980-1983 1.0mm (.040") B9HS10 BR9HS10
Evinrude 8   1984-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 9.9 SAIL DRIVE 1978-1983 1.0mm (.040") B9HS10 BR9HS10
Evinrude 9.9   1978-1979 0 BUHW2  
Evinrude 9.9   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 10 COMMERCIAL 1981-1982 0 BUHW2  
Evinrude 14 COMMERCIAL 1981- 0 BUHW2  
Evinrude 15 SAIL DRIVE 1981-1984 1.0mm (.040") B9HS10 BR9HS10
Evinrude 15   1978-1979 0 BUHW2  
Evinrude 15   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 20   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 25   1978-1986 1.0mm (.040") B9HS10 BR9HS10
Evinrude 25   2003-2005 1.0mm (.040") BPZ8HS10  
Evinrude 28   1987- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 30   1984-1986 1.0mm (.040") B9HS10 BR9HS10
Evinrude 35   1977-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 40 COMMERCIAL 1982- 0.7mm (.028") B7HS BR7HS
Evinrude 40 COMMERCIAL 1984-1987 0 BUHW2  
Evinrude 40   1981-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 40   1982- 0.7mm (.028") B7HS BR7HS
Evinrude 40   2004-2005 0.8mm (.032") PZFR6H  
Evinrude 48   1987- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 50   1978-1983 1.0mm (.040") B9HS10 BR9HS10
Evinrude 55 COMMERCIAL 1982- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 55 COMMERCIAL 1984-1985 1.0mm (.040") B9HS10 BR9HS10
Evinrude 55 COMMERCIAL 1986- 0 BUHXW1  
Evinrude 55 COMMERCIAL 1987- 0 BUHW2  
Evinrude 55   1976-1983 1.0mm (.040") B9HS10 BR9HS10
Evinrude 60   1980-1985 1.0mm (.040") B9HS10 BR9HS10
Evinrude 60   2005- 0.8mm (.032") PZFR6H  
Evinrude 65 COMMERCIAL 1984-1986 1.0mm (.040") B9HS10 BR9HS10
Evinrude 65 COMMERCIAL 1987- 0 BUHW2  
Evinrude 70   1975-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 75 HUSTLER 1975- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 75   1976-1985 1.0mm (.040") B9HS10 BR9HS10
Evinrude 75   2001-2005 0.8mm (.032") BKR5EK  
Evinrude 85   1975-1980 1.0mm (.040") B9HS10 BR9HS10
Evinrude 90   1981-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 90   2001-2005 0.8mm (.032") BKR5EK  
Evinrude 90 V4 FFI 2000- 0.8mm (.032") PZFR6H  
Evinrude 100 COMMERCIAL 1984- 0 L76V   
Evinrude 100 COMMERCIAL 1985-1987 0 BUHW2  
Evinrude 100   1979-1980 1.0mm (.040") B9HS10 BR9HS10
Evinrude 100   2004-2005 0.8mm (.032") BKR5EK  
Evinrude 110   1986-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 115 E-TECH 2005- 0.8mm (.032") IZFR5J  
Evinrude 115   1975-1984 1.0mm (.040") B9HS10 BR9HS10
Evinrude 115   1985- 0 L76V   
Evinrude 115   2004-2005 0.8mm (.032") BKR5EK  
Evinrude 120   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Evinrude 125 COMMERCIAL 1990- 1.0mm (.040") B9HS10 BR9HS10
Evinrude 140 140 S 1977-1979 0 BUHXW1  
Evinrude 140   1973-1984 0 BUHXW1  
Evinrude 140   1985-1992 1.0mm (.040") BR9HS10  
Evinrude 150   1978-1987 0 BUHXW1  
Evinrude 150   1988-1992 1.0mm (.040") B9HS10 BR9HS10
Evinrude 155 COMMERCIAL 1978-1986 0 BUHXW1  
Evinrude 155 COMMERCIAL 1987- 0 BUHW2  
Evinrude 155 COMMERCIAL 1989-1992 0 BUZ8H  
Evinrude 175   1977-1987 0 BUHXW1  
Evinrude 175   1988-1992 1.0mm (.040") B9HS10 BR9HS10
Evinrude 175   2005- 0.8mm (.032") IZFR5J  
Evinrude 185 COMMERCIAL 1984-1985 0 BUHXW1  
Evinrude 185 COMMERCIAL 1990-1992 1.0mm (.040") BR9HS10  
Evinrude 200 F MODELS 2005- 0.8mm (.032") PZFR6H  
Evinrude 200 F MODELS 2005- 0.8mm (.032") PZFR6H  
Evinrude 200 F MODELS 2005- 0.8mm (.032") PZFR6H  
Evinrude 200   1976-1983 0 BUHXW1  
Evinrude 200   1986-1992 1.0mm (.040") B9HS10 BR9HS10
Evinrude 225 F MODELS 2005- 0.8mm (.032") PZFR6H  
Evinrude 225   1986- 1 B9HS10 BR9HS10
Evinrude 235   1978-1985 0 BUHXW1  
Evinrude 250 F MODELS 2005- 0.8mm (.032") PZFR6H  
Evinrude 250   1991-1992 1 BR9HS10  
Evinrude 275   1985-1988 1 BR9HS10  
Evinrude 300   1986-1992 1 B9HS10 BR9HS10

Honda Outboard Motor Spark Plug Chart

Make Model Type Year Gap Standard Resistor
Honda 8 BFP 8D1 8.0HP 2001- 0.9mm (.036") CR5EH9  
Honda 9.9 BFP9.9D1 9.9HP 2001- 0.9mm (.036") CR5EH9  
Honda 20 BF20   0.6mm (.024") BM4A BMR4A
Honda 20 BF20D 2003- 0.9mm (.036") CR5EH9  
Honda 25 BF25D4 2004- 0.7mm (.028") DR7EA  
Honda 30 BF30   0.7mm (.028") D8EA DR8EA
Honda 30 BF30D4 2004- 0.7mm (.028") DR7EA  
Honda 30 GB-30   0.6mm (.024") B6HS BR6HS
Honda 40 GB-40   0.6mm (.024") B6HS BR6HS
Honda 45 B45   0.6mm (.024")   DR6HS
Honda 50 BF50   0.7mm (.028") DR7EA  
Honda 60 BF60 2009- 0.9mm (.036") LMAR6C9  
Honda 75 B75 K   0.6mm (.024")   DR6HS
Honda 75 BF75 2003- 0.7mm (.028") DR7EA  
Honda 75 BF75 E   0.6mm (.024")   DR6HS
Honda 75 BF75A   0.7mm (.028") DR7EA  
Honda 100 BF100 E   0.6mm (.024")   DR6HS
Honda 115 BF115   0.8mm (.032") ZFR7F  
Honda 125 AQUA TRAX R-12 2002-2006 0.9mm (.036") IMR9D9H  
Honda 200 BF200A V6 2002- 1.1mm (.044") IZFR6K11 ZFR6K11
Honda 225 BF225A V6 2002- 1.1mm (.044") IZFR6K11 ZFR6K11

Johnson Outboard Motor Spark Plug Chart

Make Model Type Year Gap Standard Resistor
Johnson 1.5mm (.060")   1986-1987 0.7mm (.028") B6S  
Johnson 1.6 1.6 L 115-SD   1.0mm (.040") B9HS10 BR9HS10
Johnson 1.8 1.8 L 140-SD   1.0mm (.040") B9HS10 BR9HS10
Johnson 2 2R 1971-1979 0.7mm (.028") B6S  
Johnson 2   1980-1985 0.7mm (.028") B6S  
Johnson 2.5   1986- 1.0mm (.040") B9HS10 BR9HS10
Johnson 2.6 2.6 L 190-SD   1.0mm (.040") B9HS10 BR9HS10
Johnson 2.7 2.7 L 225-SD   1.0mm (.040") B9HS10 BR9HS10
Johnson 3.5   2001-2002 0.7mm (.028") BPR6HS  
Johnson 3.6 3.6 L 275-SD   1.0mm (.040") B9HS10 BR9HS10
Johnson 4 DEL. 1986-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 4 R,RW 1977-1980 1.0mm (.040") B9HS10 BR9HS10
Johnson 4   1985-1987 0.6mm (.024") B6HS BR6HS
Johnson 4.5   1979-1980 1.0mm (.040") B9HS10 BR9HS10
Johnson 6   1977-1979 0 BUHW2  
Johnson 6   1984-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 7.5   1980-1983 1.0mm (.040") B9HS10 BR9HS10
Johnson 8   1984-1986 1.0mm (.040") B9HS10 BR9HS10
Johnson 8   2002- 0.7mm (.028") DR5HS  
Johnson 9.9 E,R,SEL 1977-1979 0 BUHW2  
Johnson 9.9   1980-1986 1.0mm (.040") B9HS10 BR9HS10
Johnson 10 COMMERCIAL 1981-1982 0 BUHW2  
Johnson 10   2006-2006 0.8mm (.032") BR7HS  
Johnson 14 COMMERCIAL 1981-1982 0 BUHW2  
Johnson 15 E,R 1977-1979 0 BUHW2  
Johnson 15   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 15   2005- 0.8mm (.032") BKR6E  
Johnson 15   2006- 0.8mm (.032") BR7HS  
Johnson 20   1986-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 25 COMMERCIAL 1985-1986 1.0mm (.040") B9HS10 BR9HS10
Johnson 25 E,R 1977-1979 0 BUHW2  
Johnson 25   1980-1986 1.0mm (.040") B9HS10 BR9HS10
Johnson 28   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 30   1984-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 35 E,R 1977-1979 0 BUHW2  
Johnson 35   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 40 40E 1985-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 40 COMMERCIAL 1981- 1.0mm (.040") B9HS10 BR9HS10
Johnson 40 COMMERCIAL 1982- 0.7mm (.028") B7HS BR7HS
Johnson 40 COMMERCIAL 1984-1986 0 BUHW2  
Johnson 40   2002- 0.7mm (.028") DCPR7E  
Johnson 40   2005- 0.7mm (.028") DCPR6E  
Johnson 45 COMMERCIAL 1987- 0 BUHW2  
Johnson 50 R 1977-1979 1.0mm (.040") B9HS10 BR9HS10
Johnson 50   2002- 0.7mm (.028") DCPR7E  
Johnson 50   1971-1980 0 BUHW2  
Johnson 50   1981-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 50   2005- 0.7mm (.028") DCPR6E  
Johnson 55 COM 1986-2005 0 BUHXW1  
Johnson 55 COMMERCIAL 1980-1983 0 L76V   
Johnson 55 COMMERCIAL 1984-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 55 E 1976-1979 0 L76V   
Johnson 60   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 60   2002-2005 0.8mm (.032") BPR6ES BP6ES
Johnson 65 COMMERCIAL HC 1984-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 65 COMMERCIAL LC 1986- 0 BUHXW1  
Johnson 70 EL 1976-1979 1.0mm (.040") B9HS10 BR9HS10
Johnson 70   1980-1986 1.0mm (.040") B9HS10 BR9HS10
Johnson 70   2002-2005 0.8mm (.032") BPR6ES BP6ES
Johnson 75 ER 1976-1979 1.0mm (.040") B9HS10 BR9HS10
Johnson 75   1980-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 85 ML,ETLR,TXLR 1977-1978 1.0mm (.040") B9HS10 BR9HS10
Johnson 85 ML,TL,TX 1979-1980 1.0mm (.040") B9HS10 BR9HS10
Johnson 90   1981-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 90   2003- 0.8mm (.032") BKR6E  
Johnson 90   2006- 1.0mm (.040") BPZ8HS10  
Johnson 100 COMMERCIAL 1980- 1.0mm (.040") B9HS10 BR9HS10
Johnson 100 COMMERCIAL 1984-1987 0 BUHW2  
Johnson 100 ML,TLR,TXLR 1979- 1.0mm (.040") B9HS10 BR9HS10
Johnson 110   1986-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 115 115ETL 1974-1978 1.0mm (.040") B9HS10 BR9HS10
Johnson 115 115ML 1978-1979 1.0mm (.040") B9HS10 BR9HS10
Johnson 115 115TL 1979- 1.0mm (.040") B9HS10 BR9HS10
Johnson 115 115TXL 1977-1979 1.0mm (.040") B9HS10 BR9HS10
Johnson 115   1980-1985 1.0mm (.040") B9HS10 BR9HS10
Johnson 115   2006- 1.0mm (.040") BPZ8HS10  
Johnson 120   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 140 ML,TL,TXL 1977-1979 0 BUHXW1  
Johnson 140   1980-1984 0 BUHXW1  
Johnson 140   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 140   2003-2005 0.8mm (.032") BKR6E  
Johnson 150 TL,TXL 1978-1979 0 BUHXW1  
Johnson 150   1980-1986 0 BUHXW1  
Johnson 150   1987- 0 BUHW2  
Johnson 150   2003-2006 1.0mm (.040") BPZ8HS10  
Johnson 155 COMMERCIAL 1984-1986 0 BUHXW1  
Johnson 175 TL,TXL 1977-1980 0 BUHXW1  
Johnson 175   1977-1986 0 BUHXW1  
Johnson 175   1987- 1.0mm (.040") B9HS10 BR9HS10
Johnson 185 COMMERCIAL 1984-1986 0 BUHXW1  
Johnson 200 TL,TXL 1976-1980 0 BUHXW1  
Johnson 200   1981-1986 0 BUHXW1  
Johnson 200   1987- 1.0mm (.040") B9HS10 BR9HS10
Johnson 225   1986- 0 BUHXW1  
Johnson 225   1987- 1.0mm (.040") B9HS10 BR9HS10
Johnson 235 TL,TXL 1978-1980 0 BUHXW1  
Johnson 235   1978-1985 0 BUHXW1  
Johnson 235   1981-1984 0 BUHXW1  
Johnson 250 LV6   0 BUZ8H  
Johnson 250   1993-1991 1.0mm (.040") BPZ8HS10  
Johnson 275   1985-1987 1.0mm (.040") B9HS10 BR9HS10
Johnson 300   1983-1986 1.0mm (.040") BPZ8HS10  
Johnson 300   1994-1995 0.7mm (.028") BPR6HS  

Mariner Outboard Motor Spark Plug Chart

Make Model Type Engine Year Gap Standard Resistor
Mariner 2 2A 646   0.5mm (.020") B5HS BR5HS
Mariner 2 2B 6A1   0.5mm (.020") B5HS BR5HS
Mariner 2.5   1990- 0.6mm (.024") BP6HS BPR6HS
Mariner 2.5   1990-2002 1.0mm (.040") BPR6HS10  
Mariner 3.3 642 1993- 0.7mm (.028") BPR6HS  
Mariner 3.5     0.7mm (.028") B7HS BR7HS
Mariner 3.5     0.7mm (.028") B7HS BR7HS
Mariner 4 4A 6E0   0.7mm (.028") B7HS BR7HS
Mariner 4   1990- 1.0mm (.040") BP7HS10 BPR7HS11
Mariner 4 4A6EO   0.7mm (.028") B7HS BR7HS
Mariner 4 2-Stroke 1990-2002 1.0mm (.040") BPR7HS10  
Mariner 4 4-Stroke 1990-2002 0.7mm (.028") DCPR6E  
Mariner 4.4,5.5     1.0mm (.040") BPR7HS10  
Mariner 5 5B 661   0.7mm (.028") B7HS BR7HS
Mariner 5 5C 6E3   0.7mm (.028") B7HS BR7HS
Mariner 5   1990- 1.0mm (.040") BP7HS10 BPR7HS11
Mariner 5 2-Stroke 1990-2002 1.0mm (.040") BPR7HS10  
Mariner 5 4-Stroke 1999-2002 0.7mm (.028") DCPR6E  
Mariner 6 2-Stroke 1992-2002 1.0mm (.040") BP8HN10  
Mariner 6 4-Stroke 2000-2002 0.7mm (.028") DCPR6E  
Mariner 8 8A 655+647   0.6mm (.024") B6HS BR6HS
Mariner 8 8B 677   0.7mm (.028") B7HS BR7HS
Mariner 8 8C 6G1   1.0mm (.040") B7HS10 BR7HS10
Mariner 8   1993-2002 1.0mm (.040") BP8HN10  
Mariner 9 4-Stroke 1999-2002 0.9mm (.036") DPR6EA9  
Mariner 9.9 C 682   0.7mm (.028") B7HS BR7HS
Mariner 9.9     1.0mm (.040") B7HS10 BR7HS10
Mariner 10   1991- 1.5mm (.060") BP8HS15  
Mariner 15 A,C 684 + 651   0.7mm (.028") B7HS BR7HS
Mariner 15 C 684-CDI   1.0mm (.040") B7HS10 BR7HS10
Mariner 15 MARATHON 1997-2002 1.5mm (.060") BP8HS15  
Mariner 15 W 662   0.7mm (.028") B7HS BR7HS
Mariner 15 4-Stroke 1998-2002 0.9mm (.036") DPR6EA9  
Mariner 20 A 653   0.6mm (.024") B6HS BR6HS
Mariner 20 C 6A9   0.7mm (.028") B7HS BR7HS
Mariner 20   1985-2002 1.0mm (.040") BP8HN10  
Mariner 25 C,A 695 + 648   0.7mm (.028") B7HS BR7HS
Mariner 25 MARATHON 4-Stroke 1993-2002 1.0mm (.040") BP8HN10  
Mariner 25 W 6A4   0.7mm (.028") B7HS BR7HS
Mariner 25   1998-2002 0.9mm (.036") DPR6EA9  
Mariner 28     0.7mm (.028") B7HS BR7HS
Mariner 30 MARATHON 1995-2002 1.0mm (.040") BP8HN10  
Mariner 30 MARATHON,A,W 689+689B   0.7mm (.028") B7HS BR7HS
Mariner 30 4-Stroke 1999-2002 0.9mm (.036") DPR6EA9  
Mariner 30   2000- 0.7mm (.028") DCPR6E  
Mariner 40 A 676A   0.8mm (.032") B8HS BR8HS
Mariner 40 C 6E9   0.8mm (.032") B8HS BR8HS
Mariner 40 MARATHON 1995-2002 1.0mm (.040") BP8HN10  
Mariner 40 W 676A,B   0.8mm (.032") B8HS BR8HS
Mariner 40   2002- 0.7mm (.028") DCPR7E  
Mariner 40   2000- 0.7mm (.028") DCPR6E  
Mariner 40   2002- 0.7mm (.028") DCPR7E  
Mariner 45     0 BUHW2  
Mariner 48 W 670   0.7mm (.028") B7HS BR7HS
Mariner 50   1990- 0 BUHW2  
Mariner 50   1992- 0 BUZ8H  
Mariner 50 4-Stroke 1995-2001 0.9mm (.036") DPR6EA9  
Mariner 50   2000- 0.7mm (.028") DCPR6E  
Mariner 50     0 L76V   
Mariner 50     0 BUHW2  
Mariner 55 W55 6A3   0.8mm (.032") B8HS BR8HS
Mariner 55     1.0mm (.040") B8HS10 BR8HS10
Mariner 60 EFI 2002- 0.7mm (.028") DCPR7E  
Mariner 60   1990- 0 BUHW2  
Mariner 60   1992- 0 BUZ8H  
Mariner 60   2001- 0.9mm (.036") DPR6EA9  
Mariner 60     0 L76V   
Mariner 60     1.0mm (.040") B8HS10 BR8HS10
Mariner 60     1.0mm (.040") BPZ8HN10  
Mariner 60   1984-1990 0 BUZHW  
Mariner 70     0 L76V   
Mariner 75 MARATHON 1991-2002 0 BUHW2  
Mariner 75 4-Stroke 2000- 1.1mm (.044") LFR5A11  
Mariner 80   1995-2001 1.0mm (.040") BP8HN10  
Mariner 80     0 BUHW2  
Mariner 85     0 BUHW2  
Mariner 90   2000- 1.1mm (.044") LFR5A11 ZFR5F11
Mariner 90     0 BUHW2  
Mariner 90     0 L76V   
Mariner 100 1988   0 L76V   
Mariner 115 OPTIMAX 2000-2002 1.1mm (.044") PZFR5F11 ZFR5F11
Mariner 115 2-Stroke 1989-2002 1.0mm (.040") BP8HN10  
Mariner 115     0 L76V   
Mariner 125     1.0mm (.040") BPZ8HN10  
Mariner 135 MARATHON   0 BU8H  
Mariner 135 OPTIMAX 1998-2002 1.1mm (.044") PZFR5F11 ZFR5F11
Mariner 140     0 BUZHW  
Mariner 140     0 L76V   
Mariner 150 MAGNUM 2000- 1.0mm (.040") BPR7HS10  
Mariner 150 OPTIMAX 1997-2002 1.1mm (.044") PZFR5F11 ZFR5F11
Mariner 150 V150 A905890 V6   0 L76V   
Mariner 150 V150 A905891 V6   0 BU8H  
Mariner 150 V6 EFI 2000- 1.0mm (.040") BPZ8HS10  
Mariner 175 EFI 2000- 1.0mm (.040") BPZ8HS10  
Mariner 175 MAGNUM 2000- 1.0mm (.040") BPR7HS10  
Mariner 175 V175 A918688 V6   0 L76V   
Mariner 175 V175 A918689 V6   0 BU8H  
Mariner 200 OPTIMAX 1997-2002 1.1mm (.044") PZFR5F11 ZFR5F11
Mariner 200 V200 A914497 V6   0 L76V   
Mariner 200 V200 A914498 V6   0 BU8H  
Mariner 200   1997-1999 0 BU8H  
Mariner 200   2000- 1.0mm (.040") BPR7HS10  
Mariner 220 V220   0 BU8H  
Mariner 225 OPTIMAX   1.1mm (.044") PZFR5F11 ZFR5F11
Mariner 225 OPTIMAX 1996-2001 1.0mm (.040") BPZ8HN10  
Mariner 225     0 BU8H  
Mariner 250 MAGNUM 1991-1994 0.8mm (.032") BR8HS  
Mariner 250     0 BU8H  
Mariner 275     0 BU8H  

Mercury Outboard Motor Spark Plug Chart

Make Model Type Engine Year Gap Standard Resistor
Mercury 2.2 2.2,2.5,3,3.3 HP   1.0mm (.040") BPR6HS10  
Mercury 2.2   1984-1989 0.6mm (.024") BP6HS BPR6HS
Mercury 2.5     0.7mm (.028") BPR6HS  
Mercury 3.4 L 1984-1986 0 L76V   
Mercury 3.4 L 1987-1988 0 BU8H  
Mercury 3.5   1983-1985 0.7mm (.028") BP7HS  
Mercury 3.6   1980-1981 0.7mm (.028") BP7HS  
Mercury 3.6   1982- 0.7mm (.028") BP7HS  
Mercury 3.9   1967-1968 0.5mm (.020") B5HS BR5HS
Mercury 4 L4SC 1.73L 2007- 0.8mm (.032") ILFR6GE  
Mercury 4   1976-1979 0.6mm (.024") B6HS BR6HS
Mercury 4   1980-1989 0.7mm (.028") BP7HS  
Mercury 4   1986-1987 0 BUHW2  
Mercury 4.5   1975-1985 0 BUHW2  
Mercury 5   1988-1989 1.0mm (.040") BP7HS10 BPR7HS11
Mercury 6   1986- 1.0mm (.040") BP7HS10 BPR7HS11
Mercury 6   1987-1989 1.0mm (.040") BP8HS10  
Mercury 6   1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 6 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 7.5   1975-1978 0 BUHW2  
Mercury 7.5   1979-1985 1.0mm (.040") B9HS10 BR9HS10
Mercury 8   1986- 1.0mm (.040") BP7HS10 BPR7HS11
Mercury 8   1987-1989 1.0mm (.040") BP8HS10  
Mercury 8   1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 8 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 8 4-Stroke 2006-2006 0.7mm (.028") DCPR6E  
Mercury 9.8   1975-1978 0 BUHW2  
Mercury 9.8   1979-1985 1.0mm (.040") B9HS10 BR9HS10
Mercury 9.9   1986- 1.0mm (.040") BP7HS10 BPR7HS11
Mercury 9.9   1987-1989 1.0mm (.040") BP8HS10  
Mercury 9.9   1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 9.9 2-Stroke 2001-2006 1.0mm (.040") BPZ8HS10  
Mercury 9.9 4-Stroke 2006- 0.7mm (.028") DCPR6E  
Mercury 10 SEAPRO   1.5mm (.060") BP8HS15  
Mercury 15 2-Stroke 2001-2006 1.0mm (.040") BPZ8HS10  
Mercury 15     1.0mm (.040") BP8HS10  
Mercury 18 X 1984-1985 0 L76V   
Mercury 18   1980-1983 1.0mm (.040") B9HS10 BR9HS10
Mercury 20 20 1986-1989 0 L76V   
Mercury 20 20200 1970-1980 0 BUHW2  
Mercury 20   1992-1994 1.0mm (.040") BPZ8HN10  
Mercury 20 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 25 250 1980-1983 1.0mm (.040") B8HS10 BR8HS10
Mercury 25 25XD 1984-1989 0 L76V   
Mercury 25 SEA-PRO 1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 25 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 25 4-Stroke 2006- 0.7mm (.028") DCPR6E  
Mercury 30 303 4-Stroke 2006- 0.7mm (.028") DCPR7E  
Mercury 30     1.0mm (.040") BPZ8HN10  
Mercury 35 350 1984-1989 0 L76V   
Mercury 40 40 1979-1983 0 L76V   
Mercury 40 403 4-Stroke 2006- 0.7mm (.028") DCPR7E  
Mercury 40 BIG FOOT 4-Stroke 2001-2006 0.9mm (.036") DPR6EA9  
Mercury 40 SEA PRO 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 45 45 1986-1989 0 BUHW2  
Mercury 50 50 1986-1988 0 L76V   
Mercury 50 503 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 50 504 4-Stroke 2006- 0.7mm (.028") DCPR7E  
Mercury 50 50500 1976-1985 0 BUHW2  
Mercury 50   1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 55 SEA-PRO 1993-1994 1.0mm (.040") BPZ8HN10  
Mercury 60 600 1984-1989 0 L76V   
Mercury 60 603 2-Stroke 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 60 604 4-Stroke 2006- 0.7mm (.028") DCPR7E  
Mercury 70 70 1987-1989 0 BUHW2  
Mercury 70 700 1979-1983 0 L76V   
Mercury 75 750 1984-1986 0 BUHW2  
Mercury 75 753 2-Stroke 2001-2006 0 BUZHW2  
Mercury 75 754 4-Stroke 2000-2006 1.1mm (.044") LFR5A11  
Mercury 75 OPTI MAX 2006- 0.8mm (.032") IZFR5J  
Mercury 80 80800 78-83, 86-89 0 BUHW2  
Mercury 85 850 1977- 0 BUHW2  
Mercury 90 90 1987-1989 0 BUHW2  
Mercury 90 90 4-Stroke 2000-2006 1.1mm (.044") LFR5A11  
Mercury 90 90 OPTI MAX 2006- 0.8mm (.032") IZFR5J  
Mercury 90 90900 1978-1986 0 L76V   
Mercury 100 100 1988-1989 0 L76V   
Mercury 100   1991-1994 1.0mm (.040") BPZ8HN10  
Mercury 115 115, 1150 1970-1988 0 L76V   
Mercury 115 OPTI MAX 2006- 0.8mm (.032") IZFR5J  
Mercury 115   1991-1994 1.0mm (.040") BPZ8HN10  
Mercury 115 2-Stroke 1154 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 115 4-Stroke MFI4 2001-2006 1.1mm (.044") LFR5A11  
Mercury 125   1994 1.0mm (.040") BPZ8HN10  
Mercury 125 2-Stroke 1254 2001-2006 1.0mm (.040") BPZ8HN10  
Mercury 135 OPTI MAX 2-Stroke DFI6 2003-2006 0.8mm (.032") IZFR5G  
Mercury 135 V-135 1969-1989 0 BU8H  
Mercury 135 4-Stroke EFI6 2006- 0.7mm (.028") ILFR6G  
Mercury 140 140, 1400 1978-1980 0 L76V   
Mercury 150 150, 1500 1973-1984 0 L76V   
Mercury 150 XR-4,V-150 1985-1989 0 BU8H  
Mercury 150 2-Stroke EFI6 2000-2006 1.0mm (.040") BPZ8HS10  
Mercury 150   2000-2006 1.0mm (.040") BPZ8HS10  
Mercury 150 4STROKE EFI6 2006- 0.7mm (.028") ILFR6G  
Mercury 150 OPTI MAX   1.1mm (.044") PZFR5F11 ZFR5F11
Mercury 175 1751750 1976-1981 0 L76V   
Mercury 175 OPTI MAX 2-Stroke 2003-2006 0.8mm (.032") IZFR5G  
Mercury 175 SUPERCHARGED 4-Stroke EFI6 2006- 0.7mm (.028") ILFR6G  
Mercury 175 V-175 1986-1989 0 BU8H  
Mercury 200 2002000 1978-1985 0 L76V   
Mercury 200 OPTI MAX 2-Stroke MAX 6 2003-2006 0.8mm (.032") IZFR5G  
Mercury 200 V-200 1986-1989 0 BU8H  
Mercury 200 VERADO 200-275 4-Stroke   0.7mm (.028") ILFR6G  
Mercury 200   2000- 1.0mm (.040") BPZ8HS10  
Mercury 200 2-Stroke MF16 2000-2006 1.0mm (.040") BPZ8HS10  
Mercury 200 2-Stroke EFI6 2006- 0.8mm (.032") BR8HS  
Mercury 200 4-Stroke EFI6 2006- 0.7mm (.028") ILFR6G  
Mercury 200 OPTI MAX   1.1mm (.044") PZFR5F11 ZFR5F11
Mercury 220 V-220 1987-1988 0 BU8H  
Mercury 225 225 1980-1981 0 L76V   
Mercury 225 3.0L 1994-1997 1.0mm (.040") BPZ8HN10  
Mercury 225 OPTI MAX 2-Stroke 2006- 0.8mm (.032") IZFR5G  
Mercury 225   1994 1.0mm (.040") BPZ8HN10  
Mercury 225 2-Stroke 1995-2006 0.8mm (.032") BR8HS  
Mercury 225 4-Stroke 2006- 1.1mm (.044") LFR5A11  
Mercury 250 OPTI MAX 2003-2006 0.7mm (.028") IZFR6J  
Mercury 250 SUPERCHARGED 2006- 0.7mm (.028") ILFR6G  
Mercury 250     0 BU8H  
Mercury 275   2006- 0.7mm (.028") ILFR6G  
Mercury 300 300 1980-1983 0 L76V   
Mercury 300 OPTIMAX 300XS 3.16L 2007- 0.8mm (.032") IZFR7M  

Suzuki Outboard Motor Spark Plug Chart

Make Model Type Engine Year Gap Standard Resistor
Suzuki 2 DT2   0.5mm (.020") B5HS BR5HS
Suzuki 3.5 DT3.5   0.6mm (.024") BP6HS BPR6HS
Suzuki 4 DT4 1985- 0.6mm (.024") B6HS BR6HS
Suzuki 4 DT4 1986- 0.6mm (.024") BP6HS BPR6HS
Suzuki 4 DF4 2003-2004 0.8mm (.032") BPR6ES BP6ES
Suzuki 5 DT5   0.6mm (.024") BP6HS BPR6HS
Suzuki 5 DT5W   0.6mm (.024") BP6HS BPR6HS
Suzuki 6 DF6 2003-2004 0.8mm (.032") BPR6ES BP6ES
Suzuki 6 DT6 1985- 0.6mm (.024") B6HS BR6HS
Suzuki 6 DT6 1986- 0.6mm (.024") BP6HS BPR6HS
Suzuki 6 DF6 2003-2004 0.8mm (.032") BPR6ES BP6ES
Suzuki 6 DT6 1993-2002 0.8mm (.032") BR6HS  
Suzuki 7 DT7 1985- 0.6mm (.024") B6HS BR6HS
Suzuki 8 DT8,C   0.6mm (.024") BP6HS BPR6HS
Suzuki 9.9 DF9.9 4-Stroke 1996-2004 0.7mm (.028") DCPR6E  
Suzuki 9.9 DT9.9 1979-1983 0.6mm (.024") B6HS BR6HS
Suzuki 9.9 DT9.9C 1986- 0.7mm (.028") B7HS BR7HS
Suzuki 15 DF15 4-Stroke 1996-2004 0.7mm (.028") DCPR6E  
Suzuki 15 DF152 4-Stroke 1996-2004 0.7mm (.028") DCPR6E  
Suzuki 15 DT15 1983- 1.0mm (.040") B7HS10 BR7HS10
Suzuki 15 DT15C 1984- 0.7mm (.028") B7HS BR7HS
Suzuki 15 DT15E 1983- 1.0mm (.040") B7HS10 BR7HS10
Suzuki 15 DT15E 1984- 0.7mm (.028") B7HS BR7HS
Suzuki 15 DT15K 1986- 0.6mm (.024") B6HS BR6HS
Suzuki 16 DT16   0.7mm (.028") B7HS BR7HS
Suzuki 16 DT16P   0.7mm (.028") B7HS BR7HS
Suzuki 20 DT20 1985- 0.7mm (.028") B7HS BR7HS
Suzuki 20 DT20 1986- 1.0mm (.040") B7HS10 BR7HS10
Suzuki 20 DT20P 1985- 0.7mm (.028") B7HS BR7HS
Suzuki 25 DF253 4-Stroke 2000-2004 0.7mm (.028") DCPR6E  
Suzuki 25 DT25   0.7mm (.028") B7HS BR7HS
Suzuki 25 DT25E 1986- 1.0mm (.040") B7HS10 BR7HS10
Suzuki 28 DT28   0.7mm (.028") B7HS BR7HS
Suzuki 30 DF303 4-Stroke 2000-2004 0.7mm (.028") DCPR6E  
Suzuki 30 DT30 1983-1985 1.0mm (.040") B7HS10 BR7HS10
Suzuki 30 DT30C 1986- 1.0mm (.040") B7HS10 BR7HS10
Suzuki 40 DF40 4-Stroke 1999-2004 0.7mm (.028") DCPR6E  
Suzuki 40 DT40,C   0.8mm (.032") B8HS BR8HS
Suzuki 50 DF50 1999-2004 0.7mm (.028") DCPR6E  
Suzuki 50 DF50 4-Stroke   0.7mm (.028") DCPR6E  
Suzuki 50 DT50   0.8mm (.032") B8HS BR8HS
Suzuki 55 DT55,C   1.0mm (.040") B8HS10 BR8HS10
Suzuki 60 DF60 4-Stroke 1998-2004 0.8mm (.032") BPR6ES BP6ES
Suzuki 60 DT60   1.0mm (.040") B8HS10 BR8HS10
Suzuki 65 DT65,C   0.8mm (.032") B8HS BR8HS
Suzuki 70 DF70 4-Stroke 1998-2004 0.8mm (.032") BPR6ES BP6ES
Suzuki 75 DT75 1985- 0.8mm (.032") B8HS BR8HS
Suzuki 75 DT75C 1985- 0.8mm (.032") B8HS BR8HS
Suzuki 75 DT75C 1986- 1.0mm (.040") B8HS10 BR8HS10
Suzuki 85 DT85,C   0.8mm (.032") B8HS BR8HS
Suzuki 90 DF90 4-Stroke 2001-2004 0.8mm (.032") BKR6E  
Suzuki 100 DT100C   1.0mm (.040") BR8HCS10  
Suzuki 115 DF115 4-Stroke 2001-2005 0.8mm (.032") BKR6E  
Suzuki 115 DT115/C   0.8mm (.032") B8HS BR8HS
Suzuki 140 DF140 4-Stroke 2002-2004 0.8mm (.032") BKR6E  
Suzuki 140 DT140/C   0.8mm (.032") B8HS BR8HS
Suzuki 150 DT150 1987-2003 1.0mm (.040") BR8HS10  
Suzuki 150 DT150   0.8mm (.032") B8HS BR8HS
Suzuki 150 DT150C   1.0mm (.040") B8HS10 BR8HS10
Suzuki 200 DT200TC   1.0mm (.040") B8HS10 BR8HS10
Suzuki 200 DT200,C,S   1.0mm (.040") B8HS10 BR8HS10
Suzuki 225 DF225 V6