Spark plugs

Marine spark plugs for boat engines

Marine spark plugs are important components in the ignition system of boat engines. They ensure the ignition of the fuel-air mixture in the engine and enable reliable starting and stable engine performance. In this category you will find spark plugs for outboards and marine engines that are used for maintenance, service and the reliable operation of boat drives.

Mercruiser spark plugs - guide & selection aid

Original spare part
 NGK BM6A @10 8349885
Mercury-Mercruiser-Quicksilver
NGK BM6A @10 8349885
article nr.8349885

Original ngk bm6a @10 8349885 / ngk bm6a @10

7,96 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK BP7HS @4 8134141
Mercury-Mercruiser-Quicksilver
NGK BP7HS @4 8134141
article nr.8134141

Original ngk bp7hs @4 8134141 / ngk bp7hs @4

10,09 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGK BPR6FS @10 8M0176634
Mercury-Mercruiser-Quicksilver
NGK BPR6FS @10 8M0176634
article nr.8M0176634

Original ngk bpr6fs @10 8m0176634 / ngk bpr6fs @10

8,90 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK BR6ES @4 8134711
Mercury-Mercruiser-Quicksilver
NGK BR6ES @4 8134711
article nr.8134711

Original ngk br6es @4 8134711 / ngk br6es @4

8,08 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGK BR8HS-10@10 8M0176619
Mercury-Mercruiser-Quicksilver
NGK BR8HS-10@10 8M0176619
article nr.8M0176619

Original ngk br8hs-10@10 8m0176619 / ngk br8hs-10@10

11,39 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK BR9ECS @10 843825
Mercury-Mercruiser-Quicksilver
NGK BR9ECS @10 843825
article nr.843825

Original ngk br9ecs @10 843825 / ngk br9ecs @10

21,76 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK BU8H @10 8M0176682
Mercury-Mercruiser-Quicksilver
NGK BU8H @10 8M0176682
article nr.8M0176682

Original ngk bu8h @10 8m0176682 / ngk bu8h @10

12,86 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK BU8H @25 13686B2
Mercury-Mercruiser-Quicksilver
NGK BU8H @25 13686B2
article nr.13686B2

Original ngk bu8h @25 13686b2 / ngk bu8h @25

8,89 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 25 )
Original spare part
 NGK CR6HS @10 827859
Mercury-Mercruiser-Quicksilver
NGK CR6HS @10 827859
article nr.827859

Original ngk cr6hs @10 827859 / ngk cr6hs @10

8,08 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Original spare part
 NGK ILKAR7K @4 8M0180173
Mercury-Mercruiser-Quicksilver
NGK ILKAR7K @4 8M0180173
article nr.8M0180173

Original ngk ilkar7k @4 8m0180173 / ngk ilkar7k @4

32,82 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGK IZFR5G @4 8M0176677
Mercury-Mercruiser-Quicksilver
NGK IZFR5G @4 8M0176677
article nr.8M0176677

Original ngk izfr5g @4 8m0176677 / ngk izfr5g @4

41,31 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGK IZFR6J @4 8M0176657
Mercury-Mercruiser-Quicksilver
NGK IZFR6J @4 8M0176657
article nr.8M0176657

Original ngk izfr6j @4 8m0176657 / ngk izfr6j @4

42,08 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGK spark plug LKAR7C-9 8M0176616
Mercury-Mercruiser-Quicksilver
NGK spark plug LKAR7C-9 8M0176616
article nr.8M0176616

Original ngk spark plug lkar7c-9 8m0176616 /

ngk lkar7c-9@10

22,66 EUR / Piece
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Original spare part
 NGK ZFR5F @4 8M0176692
Mercury-Mercruiser-Quicksilver
NGK ZFR5F @4 8M0176692
article nr.8M0176692

Original ngk zfr5f @4 8m0176692 / ngk zfr5f @4

12,18 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 4 )
Original spare part
 NGKBPZ8HN-10@10 8M0176658
Mercury-Mercruiser-Quicksilver
NGKBPZ8HN-10@10 8M0176658
article nr.8M0176658

Original ngkbpz8hn-10@10 8m0176658 / ngkbpz8hn-10@10

19,70 EUR
(2)
incl. 19% VAT
Lieferung Fri 07. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Min quantity: 10 )
Bujia Ngk Ilzkr7D8 Suzuki 09482-00642
NGK
Bujia Ngk Ilzkr7D8 Suzuki 09482-00642
article nr.NGKILZKR7D8

Suitable for the following models: DF300B, DF350A, DF325A

43,62 EUR
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Champion Z9Y spark plug Yamaha Ngk-Cr6Hs-00-00
Champion
Champion Z9Y spark plug Yamaha Ngk-Cr6Hs-00-00
article nr.CHAZ9Y

Suitable for the following models: 9.9T

17,89 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Iridium spark plug 5IX - Item NGKTR5IX
NGK
Iridium spark plug 5IX - Item NGKTR5IX
article nr.NGKTR5IX

IRIDIUM SPARK PLUG

25,20 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Iridium spark plug 5IX - Item NGKYR5IX
NGK
Iridium spark plug 5IX - Item NGKYR5IX
article nr.NGKYR5IX

IRIDIUM SPARK PLUG

27,98 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 Piece)
Iridium spark plug 6IX
NGK
Iridium spark plug 6IX
article nr.NGKUR6IX

Suitable for the following models: 8.1GI-H, 8.1GI-HF, 8.1GXI-G, 8.1GXI-GF, 8.1OSI-D, 8.1OSI-DF

27,97 EUR / Piece
incl. 19% VAT
Lieferung Wed 05. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
Displaying 41 to 60 (of 105 products)
  • Over 15 years’ experience in the marine spare parts trade
    Over 15 years’ experience in the marine spare parts trade
  • Official Mercury & MerCruiser dealer
    Official Mercury & MerCruiser dealer
  • A wide range of boat engine spare parts from A to Z
    A wide range of boat engine spare parts from A to Z
  • Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
    Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
  • Fast delivery for maintenance, servicing and repairs
    Fast delivery for maintenance, servicing and repairs
  • Order boat spare parts conveniently online 24/7
    Order boat spare parts conveniently online 24/7

Marine spark plugs for outboards and boat engines

Spark plugs are a central component of a boat engine's ignition system. They generate the electrical spark that ignites the fuel-air mixture in the cylinder and thus starts the combustion process in the engine. A functioning spark plug is crucial for a reliable engine start and stable engine performance.

Marine spark plugs are specially developed for use in boat engines and must be able to withstand high temperatures, vibrations and moisture.

Functions of a spark plug in a boat engine

The spark plug fulfills several important functions in engine operation:

  • Generation of an electrical ignition spark

  • Ignition of the fuel-air mixture in the cylinder

  • Supporting stable engine running

  • Ensuring an efficient combustion process

A correctly functioning spark plug ensures that the engine runs smoothly and can help to reduce fuel consumption and emissions.

Spark plugs for different boat engines

Marine spark plugs are used in many different boat engines, including

  • Outboard engines

  • Inboard engines

  • Jet ski engines

  • Generators and auxiliary engines

Different spark plug types are used depending on the engine manufacturer and engine series. Many well-known manufacturers of marine spark plugs include NGK, Champion and Denso.

Maintenance and replacement of marine spark plugs

Spark plugs are one of the typical maintenance and wear parts of a boat engine. Deposits, wear or incorrect electrode gaps can impair the function of the spark plug and lead to starting problems or loss of power.

Many manufacturers therefore recommend regular inspection and replacement of the spark plugs as part of engine maintenance.