NGK Spark Plugs: Tohatsu & Nissan Outboards

NGK Spark Plugs: Tohatsu & Nissan Outboards

153 spark plug applications from NGK's marine catalogue, for the engines we supply parts for. Each line gives the plug NGK specifies, the iridium upgrade where one exists, and the electrode gap.

Check the gap before you fit. Plugs are not always gapped correctly out of the box, and the wrong gap causes misfire and hard starting. Where a resistor plug is specified, fit a resistor plug — a non-resistor substitute can interfere with a tacho, sounder or engine electronics.

Tohatsu 84 applications

Model Engine / details NGK plug Iridium upgrade Gap
2 HP 2 · MFS2.0A · 4-Stroke · 07→ DCPR6E 0.6 mm
2.5 HP 2.5 · M2.5A BPR6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · M3.5A, M3.5B · 86→96 BP6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · M3.5A, M3.5B · 97→07 BPR6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · MFS3.5A · 07→ DCPR6E 0.6 mm
4 HP 4 · M4C BPR7HS BPR7HIX 0.8 mm
4 HP 4 · MFS4A, MFS4A2 · 4-Stroke · 00→07 DCPR6E 0.6 mm
5 HP 5 · B13B, B9B BR6HS BR6HIX 0.8 mm
5 HP 5 · M5A2 · 2-Stroke · 78→83 B7HS BR7HIX 0.6 mm
5 HP 5 · M5B · 2-Stroke · 83→96 BP7HS-10 BPR7HIX 1.0 mm
5 HP 5 · M5B, M5BS · 2-Stroke · 97→ BPR7HS-10 BPR7HIX 1.0 mm
5 HP 5 · MFS5A, MFS5A2 · 4-Stroke · 99→07 DCPR6E 0.6 mm
6 HP 6 · M6B BPR7HS BPR7HIX 0.8 mm
6 HP 6 · MFS6A, MFS6A2 · 4-Stroke · 04→07 DCPR6E 0.6 mm
8 HP 8 · B13B, B9B, M8A · 76→86 B7HS BR7HIX 0.6 mm
8 HP 8 · M8B · 86→96 BP7HS-10 BPR7HIX 1.0 mm
8 HP 8 · M8B · 97→07 BPR7HS-10 BPR7HIX 1.0 mm
8 HP 8 · MSF8A · 4-Stroke · 04→07 DCPR6E 0.6 mm
9.8 HP 9.8 · B18D, B18C, M9.8A · 74→85 B7HS BR7HIX 0.6 mm
9.8 HP 9.8 · M9.8B · 00→07 BPR7HS-10 BPR7HIX 1.0 mm
9.8 HP 9.8 · MSF9.8A · 4-Stroke · 04→07 DCPR6E 0.6 mm
9.9 HP 9.9 · M9.9B2, M9.9C, M9.9D · 82→07 B7HS-10 BR7HIX 0.8 mm
9.9 HP 9.9 · MFS9.9A, MFS9.9B, MFS9.9B2 · 4-Stroke · 00→07 DCPR6E 0.6 mm
12 HP 12 · B18C, B18D, M12A, M12B · 74→82 B7HS BR7HIX 0.6 mm
12 HP 12 · M12C · 82→ B7HS-10 BR7HIX 0.8 mm
13 HP 13 · M13 BR7HS-10 BR7HIX 1.0 mm
15 HP 15 · M15A · 80→82 B7HS BR7HIX 0.6 mm
15 HP 15 · M15B, M15B2 · 82→93 B7HS-10 BR7HIX 0.8 mm
15 HP 15 · M15B · 07→ BR7HS-10 BR7HIX 0.8 mm
15 HP 15 · M15C · 94→96 BP7HS-10 BPR7HIX 1.0 mm
15 HP 15 · M15C · 04→07 B7HS-10 BR7HIX 0.8 mm
15 HP 15 · M15D · 97→01 BPR7HS-10 BPR7HIX 1.0 mm
15 HP 15 · M15D · 04→07 B7HS-10 BR7HIX 0.8 mm
15 HP 15 · MFS15A, MFS15B, MFS15B2 · 4-Stroke · 00→07 DCPR6E 0.6 mm
16 HP 16 · M16 BR7HS-10 BR7HIX 1.0 mm
18 HP 18 · M18A · 80→83 B7HS BR7HIX 0.6 mm
18 HP 18 · M18C, M18C2 · 82→94 B7HS-10 BR7HIX 0.8 mm
18 HP 18 · M18C · 07→ BR7HS-10 BR7HIX 0.8 mm
18 HP 18 · M18D · 94→07 B7HS-10 BR7HIX 0.8 mm
18 HP 18 · M18E · 96→99 BR7HS-10 BR7HIX 0.8 mm
18 HP 18 · M18E · 00→01 BPR7HS-10 BPR7HIX 1.0 mm
18 HP 18 · M18E · 04→07 B7HS-10 BR7HIX 0.8 mm
18 HP 18 · MFS18B2, MFS18B4 · 4-Stroke · 04→07 DCPR6E 0.6 mm
20 HP 20 · B30C, B40A · 73→76 B7HS BR7HIX 0.6 mm
20 HP 20 · M20 BR7HS-10 BR7HIX 1.0 mm
20 HP 20 · M20A2 · 76→80 B7HS BR7HIX 0.6 mm
25 HP 25 · M25A2, M25B, M25C · 76→86 B7HS BR7HIX 0.6 mm
25 HP 25 · M25C2, M25C3, M25C4 · 87→07 BR7HS-10 BR7HIX 0.8 mm
25 HP 25 · MFS25A, MFS25B · 4-Stroke · 04→07 DCPR6E 0.6 mm
30 HP 30 · M30A, M30A2, M30A3 · 79→96 B7HS-10 BR7HIX 0.8 mm
30 HP 30 · M30A3, M30A4 · 97→07 BR7HS-10 BR7HIX 0.8 mm
30 HP 30 · MFS30A, MFS30B · 4-Stroke · 04→07 DCPR6E 0.6 mm
35 HP 35 · M35A, M35B, M35C · 76→90 B7HS BR7HIX 0.6 mm
40 HP 40 · M40A · 73→76 B7HS BR7HIX 0.6 mm
40 HP 40 · M40C, M40D · 83→03 B7HS-10 BR7HIX 0.8 mm
40 HP 40 · M40C, M40D, M40D2 · 04→ BR7HS-10 BR7HIX 0.8 mm
40 HP 40 · MD40A TLDI · 04→07 ZFR6F-11 ZFR6FIX-11 1.1 mm
40 HP 40 · MD40B TLDI · 04→07 PZFR6H 0.8 mm
50 HP 50 · M50C · 86→06 B8HS-10 BR8HIX 1.0 mm
50 HP 50 · M50D · 90→96 B8HS-10 BR8HIX 1.0 mm
50 HP 50 · M50D, M50D2 · 97→06 BR8HS-10 BR8HIX 1.0 mm
50 HP 50 · M50D · 07→ B8HS-10 BR8HIX 1.0 mm
50 HP 50 · MD50A TLDI · 04→07 ZFR6F-11 ZFR6FIX-11 1.1 mm
50 HP 50 · MD50B TLDI, W50 TLDI · 04→07 PZFR6H 0.8 mm
55 HP 55 · M55A, M55B · 80→06 B8HS-10 BR8HIX 1.0 mm
60 HP 60 · M60A, M60B, M60C · 86→07 B8HS-10 BR8HIX 1.0 mm
60 HP 60 · M60C · 07→ BR8HS-10 BR8HIX 1.0 mm
70 HP 70 · M70A, M70A2, M70B · 82→96 B8HS-10 BR8HIX 1.0 mm
70 HP 70 · M70A, M70A2 · 04→06 B8HS-10 BR8HIX 1.0 mm
70 HP 70 · M70B, M70C · 97→06 BR8HS-10 BR8HIX 1.0 mm
70 HP 70 · M70B · 07→ B8HS-10 BR8HIX 1.0 mm
70 HP 70 · MD70A2 TLDI · 04→07 PZFR6H 1.1 mm
70 HP 70 · MD70B TLDI · 04→07 PZFR6H 0.8 mm
80 HP 80 · M80A BPR7HS-10 BPR7HIX 1.0 mm
90 HP 90 · M90A · 87→96 B8HS-10 BR8HIX 1.0 mm
90 HP 90 · M90A · 97→07 BR8HS-10 BR8HIX 1.0 mm
90 HP 90 · MD90A, MD90A2 TLDI · 04→07 PZFR6H 1.1 mm
90 HP 90 · MD90B TLDI · 04→07 PZFR6H 0.8 mm
115 HP 115 · M115A, M115A2 · 93→96 B8HS-10 BR8HIX 1.0 mm
115 HP 115 · M115A, M115A2 · 97→06 BR8HS-10 BR8HIX 1.0 mm
120 HP 120 · M120A, M120A2 · 90→96 B8HS-10 BR8HIX 1.0 mm
120 HP 120 · M120A, M120A2 · 97→ BR8HS-10 BR8HIX 1.0 mm
140 HP 140 · M140A, M140A2 · 89→96 B8HS-10 BR8HIX 1.0 mm
140 HP 140 · M140A2 · 97→06 BR8HS-10 BR8HIX 1.0 mm

Nissan 69 applications

Model Engine / details NGK plug Iridium upgrade Gap
2 HP 2 · NSF 2.0A · 4-Stroke · 07→ DCPR6E 0.6 mm
2.5 HP 2.5 · NS 2.5A · 85→96 BP6HS-10 BPR6HIX 1.0 mm
2.5 HP 2.5 · NS 2.5A · 97→07 BPR6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · NS 3.5A, NS 3.5B · 85→96 BP6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · NS 3.5A, NS 3.5B · 97→07 BPR6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · NS 3.5A2 Dia. 14 mm plug · 07→ BPR6HS-10 BPR6HIX 1.0 mm
3.5 HP 3.5 · NSF 3.5A Dia. 12 mm plug · 4-Stroke · 07→ DCPR6E 0.6 mm
4 HP 4 · NSF 4, NSF 4A · 4-Stroke · 00→ DCPR6E 0.6 mm
5 HP 5 · NS 5 · 85→96 BP7HS-10 BPR7HIX 1.0 mm
5 HP 5 · NS 5B Dia. 14 mm plug · 2-Stroke · 97→07 BPR7HS-10 BPR7HIX 1.0 mm
5 HP 5 · NSF 5, NSF 5A Dia. 12 mm plug · 4-Stroke · 99→ DCPR6E 0.6 mm
6 HP 6 · NSF 6, NSF 6A · 4-Stroke · 04→ DCPR6E 0.6 mm
8 HP 8 · NS 8A, NS 8B · 85→96 BP7HS-10 BPR7HIX 1.0 mm
8 HP 8 · NS 8B Dia. 14 mm plug · 2-Stroke · 97→07 BPR7HS-10 BPR7HIX 1.0 mm
8 HP 8 · NSF 8A Dia. 12 mm plug · 4-Stroke · 04→07 DCPR6E 1.0 mm
9.8 HP 9.8 · NS 9.8B Dia. 14 mm plug · 2-Stroke · 98→07 BPR7HS-10 BPR7HIX 1.0 mm
9.8 HP 9.8 · NSF 9.8A Dia. 12 mm plug · 4-Stroke · 07→ DCPR6E 0.6 mm
9.9 HP 9.9 · NS 9.9B · 2-Stroke · 85→96 B7HS-10 BR7HIX 1.0 mm
9.9 HP 9.9 · NS 9.9B Dia. 14 mm plug · 2-Stroke · 97→07 BR7HS-10 BR7HIX 1.0 mm
9.9 HP 9.9 · NS 9.9C, NS 9.9D Dia. 14 mm plug · 2-Stroke · 04→07 B7HS-10 BR7HIX 1.0 mm
9.9 HP 9.9 · NSF 9.9A, NSF 9.9B Dia. 12 mm plug · 4-Stroke · 00→07 DCPR6E 0.6 mm
12 HP 12 · NS 12 · 85→03 B7HS-10 BR7HIX 1.0 mm
12 HP 12 · NS 12C · 04→07 BR7HS-10 BR7HIX 1.0 mm
15 HP 15 · NS 15B · 2-Stroke · 85→92 B7HS-10 BR7HIX 1.0 mm
15 HP 15 · NS 15C · 2-Stroke · 93→96 BP7HS-10 BPR7HIX 1.0 mm
15 HP 15 · NS 15C, NS 15D · 2-Stroke · 97→01 BPR7HS-10 BPR7HIX 1.0 mm
15 HP 15 · NS 15B, NS 15C, NS 15D · 2-Stroke · 02→07 BR7HS-10 BR7HIX 1.0 mm
15 HP 15 · NSF 15A, NSF 15B Dia. 12 mm plug · 4-Stroke · 04→07 DCPR6E 0.6 mm
18 HP 18 · NS 18, NS 18C · 2-Stroke · 85→96 B7HS-10 BR7HIX 1.0 mm
18 HP 18 · NS 18 · 2-Stroke · 97→99 BR7HS-10 BR7HIX 1.0 mm
18 HP 18 · NS 18E · 2-Stroke · 00→01 BPR7HS-10 BPR7HIX 1.0 mm
18 HP 18 · NS 18E Dia. 14 mm plug · 2-Stroke · 02→07 BR7HS-10 BR7HIX 1.0 mm
18 HP 18 · NS 18C, NS 18D Dia. 14 mm plug · 2-Stroke · 04→07 B7HS-10 BR7HIX 1.0 mm
18 HP 18 · NSF 18B Dia. 12 mm plug · 4-Stroke · 04→07 DCPR6E 0.6 mm
25 HP 25 · NS 25 · 2-Stroke · 86→96 B7HS-10 BR7HIX 1.0 mm
25 HP 25 · NS 25C Dia. 14 mm plug · 2-Stroke · 97→07 BR7HS-10 BR7HIX 0.8 mm
25 HP 25 · NSF 25A, NSF 25B Dia. 12 mm plug · 4-Stroke · 04→ DCPR6E 0.6 mm
30 HP 30 · NS 30A · 2-Stroke · 86→96 B7HS-10 BR7HIX 1.0 mm
30 HP 30 · NS 30A Dia. 14 mm plug · 2-Stroke · 97→07 BR7HS-10 BR7HIX 1.0 mm
30 HP 30 · NSF 30A, NSF 30B Dia. 12 mm plug · 4-Stroke · 04→ DCPR6E 0.6 mm
35 HP 35 · NS 35C · 94→95 B7HS-10 BR7HIX 1.0 mm
40 HP 40 · NS 40C, NS 40D · 2-Stroke · 85→96 B7HS-10 BR7HIX 1.0 mm
40 HP 40 · NS 40C, NS 40D, NS 40D2 · 2-Stroke · 97→06 BR7HS-10 BR7HIX 0.8 mm
40 HP 40 · NSD 40A TLDI · 2-Stroke · 04→07 ZFR6F-11 ZFR6FIX-11 1.1 mm
40 HP 40 · NSD 40B TLDI · 2-Stroke · 04→07 PZFR6H 0.8 mm
45 HP 45 · NS 45A · 94→95 B8HS-10 BR8HIX 1.0 mm
50 HP 50 · NS 50C, NS 50D · 2-Stroke · 85→96 B8HS-10 BR8HIX 1.0 mm
50 HP 50 · NS 50D · 2-Stroke · 97→06 BR8HS-10 BR8HIX 1.0 mm
50 HP 50 · NS 50D (Excl. D2) · 2-Stroke · 07→ B8HS-10 BR8HIX 1.0 mm
50 HP 50 · NS 50D2 · 2-Stroke · 07→ BR8HS-10 BR8HIX 1.0 mm
50 HP 50 · NSD 50A TLDI · 2-Stroke · 04→07 ZFR6F-11 ZFR6FIX-11 1.1 mm
50 HP 50 · NSD 50B TLDI · 2-Stroke · 04→07 PZFR6H 0.8 mm
50 HP 50 · W50B TLDI · 2-Stroke · 04→07 PZFR6H 0.8 mm
60 HP 60 · NS 55 · 85→86 B8HS-10 BR8HIX 1.0 mm
60 HP 60 · NS 60A, NS 60B · 87→07 B8HS-10 BR8HIX 1.0 mm
60 HP 60 · NS 60C · 04→07 BR8HS-10 BR8HIX 1.0 mm
70 HP 70 · NS 70B · 86→96 B8HS-10 BR8HIX 1.0 mm
70 HP 70 · NS 70B, NS 70C · 97→07 BR8HS-10 BR8HIX 1.0 mm
70 HP 70 · NSD 70A TLDI · 04→07 ZFR6F-11 ZFR6FIX-11 1.1 mm
70 HP 70 · NSD 70B TLDI · 04→09 PZFR6H 0.8 mm
90 HP 90 · NS 90A · 87→96 B8HS-10 BR8HIX 1.0 mm
90 HP 90 · NS 90A · 97→07 BR8HS-10 BR8HIX 1.0 mm
90 HP 90 · NSD 90A TLDI · 04→06 ZFR6F-11 ZFR6FIX-11 1.1 mm
90 HP 90 · NSD 90B TLDI · 04→09 PZFR6H 0.8 mm
120 HP 120 · NS 120A · 90→96 B8HS-10 BR8HIX 1.0 mm
120 HP 120 · NS 120A · 97→07 BR8HS-10 BR8HIX 1.0 mm
140 HP 140 · NS 140A · 90→96 B8HS-10 BR8HIX 1.0 mm
140 HP 140 · NS 140A2 · 97→06 BR8HS-10 BR8HIX 1.0 mm
All models Y9, Y12, Y15 B6HS BR6HIX 0.7 mm

Reading the plug codes

An NGK code describes the plug's construction. The digit in the middle is the heat rating — a higher number is a colder plug, which is the opposite of most other brands. An R after the first letters means a resistor plug. Codes ending IX are the Iridium IX range, a direct upgrade with a finer centre electrode. A Y- prefix is a diesel glow plug, not a spark plug, and has no gap.

Do not substitute a hotter or colder plug to cure a running problem. A plug reading the wrong colour is telling you about the fuel, ignition or oil — changing heat range hides it rather than fixing it.

Other engines

Not sure which plug you need?

Model families ran across several specifications and the year or serial usually decides which line applies. Ring 0412 532 984 with your engine and serial number and we will confirm the plug, the gap and how many you need. Our other workshop charts are on the reference charts page, and the how-and-why lives in our boat maintenance guides.

Applications compiled from NGK's published marine application guide and reproduced here as reference data. NGK's own guide is the authority; always confirm against your engine's manual. Listings do not apply to racing or modified engines.