# NGK Spark Plugs: Yamaha Outboards ## NGK Spark Plugs: Yamaha Outboards 222 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. - [Yamaha](#yamaha) ### Yamaha 222 applications Model Engine / details NGK plug Iridium upgrade Gap 2 HP 2 · 1-Cyl. · 84→02 B5HS 0.6 mm 2 HP 2 · 2A B6HS BR6HIX 0.6 mm 2 HP 2 · 2B · →84 BR5HS 0.6 mm 2 HP 2 · 2B · 85→86 B7HS BR7HIX 0.6 mm 2 HP 2 · 2B · 87→ BR5HS 0.6 mm 2 HP 2 · 2C · 95→ B7HS BR7HIX 0.6 mm 2.5 HP 2.5 · F2.5 · 4-Stroke · 03→05 BR6HS BR6HIX 0.6 mm 3 HP 3 · 1-Cyl. · 88→02 B6HS-10 BR6HIX 1.0 mm 3 HP 3 · 3A (Malta) BR6HS-10 BR6HIX 1.0 mm 4 HP 4 · 1-Cyl. · 84→99 B7HS BR7HIX 0.6 mm 4 HP 4 · F4 · 1-Cyl. 4-Stroke · 99→05 BR6HS BR6HIX 0.6 mm 4 HP 4 · F4B · 10→ CR6HSB CR6HIX 0.7 mm 5 HP 5 · 1-Cyl. · 84→02 B7HS BR7HIX 0.6 mm 5 HP 5 · 5C BR7HS BR7HIX 0.6 mm 5 HP 5 · 5D B5HS 0.6 mm 5 HP 5 · F5A · 10→ CR6HSB CR6HIX 0.7 mm 6 HP 6 · 2-Cyl. · 86→00 B7HS-10 BR7HIX 1.0 mm 6 HP 6 · 6A B6HS BR6HIX 0.6 mm 6 HP 6 · 6B B5HS 0.6 mm 6 HP 6 · 6D BR6HS-10 BR6HIX 1.0 mm 6 HP 6 · F6 · OHV 4-Stroke · 01→05 BR6HS-10 BR6HIX 1.0 mm 6 HP 6 · F6C · 10→ CR6HSB CR6HIX 0.7 mm 7 HP 7 · 7A B6HS BR6HIX 0.6 mm 8 HP 8 · 8A B6HS BR6HIX 0.6 mm 8 HP 8 · 8B B7HS BR7HIX 0.6 mm 8 HP 8 · 8C · 2-Cyl. 2-Stroke · 86→05 B7HS-10 BR7HIX 1.0 mm 8 HP 8 · E8D BR7HS-10 BR7HIX 1.0 mm 8 HP 8 · F8A · →85 CR6HS CR6HIX 0.6 mm 8 HP 8 · F8A, AEM, AM · 86→02 CR5HS 0.6 mm 8 HP 8 · F8B, BE, BM · 86→ CR5HS 0.6 mm 8 HP 8 · F8C, FT8D · OHV 4-Stroke · 00→05 BR6HS-10 BR6HIX 1.0 mm 9 HP 9 · 9A B6HS BR6HIX 0.6 mm 9.9 HP 9.9 · 9.9D, 9.9F Dia. 14 mm plug · 2-Stroke · 85→20 BR7HS-10 BR7HIX 1.0 mm 9.9 HP 9.9 · F9.9A, F9.9B Dia. 10 mm plug · 4-Stroke · 85→97 CR6HS CR6HIX 0.6 mm 9.9 HP 9.9 · F9.9C Dia. 12 mm plug · 4-Stroke · 98→08 DPR6EA-9 0.9 mm 9.9 HP 9.9 · F9.9F, F9.9J Dia. 14 mm plug · 4-Stroke · 08→21 BR6HS-10 BR6HIX 1.0 mm 9.9 HP 9.9 · F9.9H Dia. 12 mm plug · 4-Stroke · 09→22 DPR6EB-9 0.9 mm 9.9 HP 9.9 · FT9.9A Dia. 10 mm plug · 4-Stroke · 99→99 CR6HS CR6HIX 0.6 mm 9.9 HP 9.9 · FT9.9D Dia. 12 mm plug · 4-Stroke · 99→08 DPR6EA-9 0.9 mm 9.9 HP 9.9 · FT9.9G, FT9.9L Dia. 14 mm plug · 4-Stroke · 08→21 BR6HS-10 BR6HIX 1.0 mm 12 HP 12 · 12A B7HS BR7HIX 0.6 mm 13 HP 13 · 13.5A BR7HS-10 BR7HIX 1.0 mm 13.5 HP 13.5 · 13.5F B7HS-10 BR7HIX 1.0 mm 13.5 HP 13.5 · F13.5A DPR6EA-9 0.9 mm 15 HP 15 · 15, 15A Dia. 14 mm plug · 2-Stroke · 84→05 B7HS-10 BR7HIX 1.0 mm 15 HP 15 · 15B, 15C B7HS BR7HIX 0.6 mm 15 HP 15 · 15D, 15F · 95→ BR7HS-10 BR7HIX 1.0 mm 15 HP 15 · F15A Dia. 12 mm plug · 98→04 DPR6EA-9 0.9 mm 20 HP 20 · 20A, 20B B6HS BR6HIX 0.6 mm 20 HP 20 · 20C, 20CE, 20CM · 2-Cyl. · 96→97 B7HS-10 BR7HIX 1.0 mm 20 HP 20 · 20D BR7HS-10 BR7HIX 1.0 mm 20 HP 20 · C20 · 2-Cyl. · 96→ BR7HS BR7HIX 0.6 mm 20 HP 20 · F20A DPR6EA-9 0.9 mm 25 HP 25 · 25B · 3-Cyl. 2-Stroke · 94→95 BR8HS-10 BR8HIX 1.0 mm 25 HP 25 · 25B · 2-Cyl. 2-Stroke · 01→10 BR7HS-10 BR7HIX 1.0 mm 25 HP 25 · 25D, 25DE · 2-Cyl. 2-Stroke · 85→01 BR7HS BR7HIX 0.7 mm 25 HP 25 · 25J · 3-Cyl. 2-Stroke · 87→99 BR7HS-10 BR7HIX 1.0 mm 25 HP 25 · 25N · 2-Cyl. 2-Stroke · 88→16 BR7HS-10 BR7HIX 1.0 mm 25 HP 25 · 25Q · 3-Cyl. 2-Stroke · 90→94 BR8HS-10 BR8HIX 1.0 mm 25 HP 25 · 25V · 2-Cyl. 2-Stroke · 96→01 BR7HS-10 BR7HIX 1.0 mm 25 HP 25 · E25A, E25B · 2-Cyl. 2-Stroke · 98→03 BR7HS-10 BR7HIX 1.0 mm 25 HP 25 · F25A · 2-Cyl. 4-Stroke · 98→09 DPR6EA-9 0.9 mm 25 HP 25 · F25D, F25G · 2-Cyl. 4-Stroke · 09→21 DPR6EB-9 0.9 mm 25 HP 25 · FT25B · 2-Cyl. 4-Stroke · 00→09 DPR6EA-9 0.9 mm 25 HP 25 · FT25F · 2-Cyl. 4-Stroke · 09→22 DPR6EB-9 0.9 mm 28 HP 28 · 28A, 28AE · 87→97 B7HS-10 BR7HIX 1.0 mm 30 HP 30 · 30A, 30AE, 30AM · 84→86 B7HS BR7HIX 0.6 mm 30 HP 30 · 30D · 87→02 B7HS-10 BR7HIX 1.0 mm 30 HP 30 · 30G, 30H · 95→ B8HS-10 BR8HIX 1.0 mm 30 HP 30 · C30 · 2-Cyl. · 89→92 B7HS BR7HIX 0.6 mm 30 HP 30 · C30 · 2-Cyl. · 93→97 B8HS-10 BR8HIX 1.0 mm 30 HP 30 · F30, F30A Dia. 12 mm plug · OHC 4-Stroke · 01→05 DPR6EA-9 0.9 mm 35 HP 35 · 35 · 3-Cyl. · 87→97 B8HS-10 BR8HIX 1.0 mm 40 HP 40 · 40AE, 40AM, 40AR B8HS BR8HIX 0.6 mm 40 HP 40 · 40BE, 40BM, 40BR B8HS BR8HIX 0.6 mm 40 HP 40 · 40D, 40F · →89 B8HS BR8HIX 0.6 mm 40 HP 40 · 40GK B7HS BR7HIX 0.6 mm 40 HP 40 · 40H BR7HS-10 BR7HIX 1.0 mm 40 HP 40 · 40J · 01→ B7HS BR7HIX 0.6 mm 40 HP 40 · 40Q · 95→ BR8HS BR8HIX 0.6 mm 40 HP 40 · 40V · 95→ BR7HS-10 BR7HIX 1.0 mm 40 HP 40 · 40X, E40X · →00 BR7HS BR7HIX 0.6 mm 40 HP 40 · 40Y · 04→07 BR8HS-10 BR8HIX 1.0 mm 40 HP 40 · C40 · 2-Cyl. · 89→97 B8HS BR8HIX 0.6 mm 40 HP 40 · C40 · 3-Cyl. · 97→02 B7HS-10 BR7HIX 1.0 mm 40 HP 40 · F40A · 4-Cyl. 4-Stroke · 99→ DPR6EA-9 0.9 mm 40 HP 40 · F40C DPR5EA-9 0.9 mm 40 HP 40 · F40B · 3-Cyl. 4-Stroke · 00→05 DPR6EA-9 0.9 mm 45 HP 45 · F45A/AETL DPR6EA-9 0.9 mm 48 HP 48 · 48A, 48B, E48 · 95→00 B7HS BR7HIX 0.6 mm 50 HP 50 · 50 · 01→ B8HS-10 BR8HIX 1.0 mm 50 HP 50 · 50D · 84→05 BR8HS-10 BR8HIX 1.0 mm 50 HP 50 · 50G, 50H · 95→ BR8HS-10 BR8HIX 1.0 mm 50 HP 50 · 50TLRB · 03→ B7HS-10 BR7HIX 1.0 mm 50 HP 50 · C50 · 99→01 B8HS BR8HIX 0.6 mm 50 HP 50 · C50CE · 98→ BR8HS-10 BR8HIX 1.0 mm 50 HP 50 · F50 · 4-Cyl. 4-Stroke OHC EFI · 05→ DPR6EB-9 0.9 mm 50 HP 50 · FT50B, FT50C · 4-Cyl. 4-Stroke OHC · 95→07 DPR6EA-9 0.9 mm 50 HP 50 · FT50G, FT50J · 4-Cyl. 4-Stroke OHC EFI · 05→21 DPR6EB-9 0.9 mm 50 HP 50 · P50 · 3-Cyl. · 87→96 BR8HS-10 BR8HIX 1.0 mm 55 HP 55 · 55AE · →78 B8HS BR8HIX 0.6 mm 55 HP 55 · 55AE · 79→ B8HS-10 BR8HIX 1.0 mm 55 HP 55 · 55AEM, 55AM, 55AW B8HS BR8HIX 0.6 mm 55 HP 55 · 55B · 90→02 BR8HS-10 BR8HIX 1.0 mm 55 HP 55 · C55 · 2-Cyl. · 89→95 B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60 · 2-Stroke · 01→05 B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60AE · →78 B8HS BR8HIX 0.6 mm 60 HP 60 · 60AE · 79→ B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60B B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60CE, 60CET · 96→02 B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60D · 86→ BR8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60DE B8HS-10 BR8HIX 1.0 mm 60 HP 60 · 60F BR8HS-10 BR8HIX 1.0 mm 60 HP 60 · E60H · 95→00 B8HS-10 BR8HIX 1.0 mm 60 HP 60 · FT60B · 4-Stroke · 03→06 DPR5EA-9 0.9 mm 60 HP 60 · FT60D, FT60G · 4-Stroke EFI · 05→21 DPR6EB-9 0.9 mm 60 HP 60 · P60 · 3-Cyl. · 91→99 B8HS-10 BR8HIX 1.0 mm 65 HP 65 · 65 · 3-Cyl. · 87→97 B8HS-10 BR8HIX 1.0 mm 70 HP 70 · 70B · 84→05 B8HS-10 BR8HIX 1.0 mm 70 HP 70 · 70ETO BR8HS-10 BR8HIX 1.0 mm 70 HP 70 · C70 · 00→01 B8HS-10 BR8HIX 1.0 mm 70 HP 70 · F70AETL · 10→ LKR7E 0.9 mm 75 HP 75 · 75A, 75B BR8HS-10 BR8HIX 1.0 mm 75 HP 75 · C75, E75, P75 · 94→00 B8HS-10 BR8HIX 1.0 mm 75 HP 75 · F75 · 4-Stroke · 03→05 LFR5AP-11 1.1 mm 80 HP 80 · 80A BR8HS-10 BR8HIX 1.0 mm 80 HP 80 · C80 · 3-Cyl. · 97→ B8HS-10 BR8HIX 1.0 mm 80 HP 80 · F80 · 3-Cyl. · 99→02 LFR5AP-11 1.1 mm 80 HP 80 · F80A · 4-Stroke · 06→ LFR5A-11 LFR5AP-11 1.1 mm 85 HP 85 · 85A BR8HS-10 BR8HIX 1.0 mm 85 HP 85 · C85 · 3-Cyl. · 89→96 B8HS-10 BR8HIX 1.0 mm 90 HP 90 · 90A · 84→05 B8HS-10 BR8HIX 1.0 mm 90 HP 90 · B90, C90 · 3-Cyl. · 97→01 B8HS-10 BR8HIX 1.0 mm 90 HP 90 · F90 · 4-Stroke · 03→05 LFR5A-11 LFR5AP-11 1.1 mm 100 HP 100 · 100A · 98→ BR8HS-10 BR8HIX 1.0 mm 100 HP 100 · F100 · 4-Stroke · 99→02 LFR5A-11 LFR5AP-11 1.1 mm 115 HP 115 · 115A, 115E · 84→87 B8HS-10 BR8HIX 1.0 mm 115 HP 115 · 115B, 115C · 88→13 BR8HS-10 BR8HIX 1.0 mm 115 HP 115 · B115, C115 · V4 · 98→99 BR8HS-10 BR8HIX 1.0 mm 115 HP 115 · F115A · 00→15 LFR6A-11 ILFR6T11 1.1 mm 115 HP 115 · F115B · 14→ LKR6E 0.9 mm 115 HP 115 · FL115A · 00→15 LFR6A-11 ILFR6T11 1.1 mm 115 HP 115 · FL115B · 14→ LKR6E 0.9 mm 115 HP 115 · P115, S115 · V4 · 84→05 BR8HS-10 BR8HIX 1.0 mm 130 HP 130 · 130A, 130B · 88→04 BR9HS-10 BR9HIX 1.0 mm 130 HP 130 · L130, S130 · V4 · 88→01 BR9HS-10 BR9HIX 1.0 mm 140 HP 140 · 140A, 140B · →88 BR8HS-10 BR8HIX 1.0 mm 140 HP 140 · 140B, 140C · 89→ BR9HS-10 BR9HIX 1.0 mm 140 HP 140 · L140C · 95→ BR9HS-10 BR9HIX 1.0 mm 150 HP 150 · 150A · 84→85 BR7HS-10 BR7HIX 1.0 mm 150 HP 150 · 150A, 150C · 86→02 BR8HS-10 BR8HIX 1.0 mm 150 HP 150 · 150F, 150G · 96→07 BR7HS-10 BR7HIX 1.0 mm 150 HP 150 · D150H · 97→02 BR8HS-10 BR8HIX 1.0 mm 150 HP 150 · F150A, F150B · 04→14 LFR5A-11 LFR5AP-11 1.1 mm 150 HP 150 · F150D, F150F · 15→21 LFR5A-11 LFR5AP-11 1.1 mm 150 HP 150 · F150G · 17→21 LFR6A-11 ILFR6T11 1.1 mm 150 HP 150 · FL150A, FL150B, FL150D · 04→21 LFR5A-11 LFR5AP-11 1.1 mm 150 HP 150 · FL150G · 17→21 LFR6A-11 ILFR6T11 1.1 mm 150 HP 150 · L150A · 88→89 BR8HS-10 BR8HIX 1.0 mm 150 HP 150 · L150F · 96→03 BR7HS-10 BR7HIX 1.0 mm 150 HP 150 · LZ150P · 00→01 BKR6E-11 BKR6EIX-11 1.1 mm 150 HP 150 · LZ150P · 02→07 BKR6EKU BKR6EIX 150 HP 150 · Z150P, Z150Q · 00→01 BKR6E-11 BKR6EIX-11 1.1 mm 150 HP 150 · Z150P, Z150Q · 02→07 BKR6EKU BKR6EIX 175 HP 175 · 175A, 175B, 175D, 175F · 84→03 BR8HS-10 BR8HIX 1.0 mm 175 HP 175 · F175A, F175B, F175C · 14→21 LFR6A-11 ILFR6T11 1.1 mm 175 HP 175 · FL175C · 17→21 LFR6A-11 ILFR6T11 1.1 mm 175 HP 175 · Z175G, Z175H · 01→01 BKR7E-11 IFR7G-11KS 1.1 mm 175 HP 175 · Z175G · 02→07 BKR7EKU BKR7EIX 200 HP 200 · 200A, 200B, 200E, 200F, 200G · 85→10 BR8HS-10 BR8HIX 1.0 mm 200 HP 200 · 200C · 92→93 BR9HS-10 BR9HIX 1.0 mm 200 HP 200 · F200A · 4-Stroke · 02→07 LFR5A-11 LFR5AP-11 1.1 mm 200 HP 200 · F200C, F200F, F200G · 4-Stroke · 06→21 LFR6A-11 ILFR6T11 1.1 mm 200 HP 200 · FL200A · 4-Stroke · 02→07 LFR5A-11 LFR5AP-11 1.1 mm 200 HP 200 · FL200C, FL200F, FL200G · 4-Stroke · 06→21 LFR6A-11 ILFR6T11 1.1 mm 200 HP 200 · L200A, L200B, L200E, L200F · 85→10 BR8HS-10 BR8HIX 1.0 mm 200 HP 200 · LZ200N · 00→01 BKR7E-11 IFR7G-11KS 1.1 mm 200 HP 200 · LZ200N · 02→05 BKR7EKU BKR7EIX 200 HP 200 · Pro V200 · 91→95 BR9HS-10 BR9HIX 1.0 mm 200 HP 200 · VZ200T · 01→04 BKR7EKU BKR7EIX 200 HP 200 · Z200N · 00→01 BKR7E-11 IFR7G-11KS 1.1 mm 200 HP 200 · Z200N, Z200P · 02→07 BKR7EKU BKR7EIX 220 HP 220 · 220A · 84→86 BR8HS-10 BR8HIX 1.0 mm 225 HP 225 · 225C, 225D · 94→09 BR8HS-10 BR8HIX 1.0 mm 225 HP 225 · F225A · 02→07 LFR5A-11 LFR5AP-11 1.1 mm 225 HP 225 · F225B, F225C, F225F, F225H, F225J · 07→21 LFR6A-11 ILFR6T11 1.1 mm 225 HP 225 · FL225A · 02→07 LFR5A-11 LFR5AP-11 1.1 mm 225 HP 225 · FL225B, FL225F, FL225H · 07→21 LFR6A-11 ILFR6T11 1.1 mm 225 HP 225 · L225C · 94→95 BR8HS-10 BR8HIX 1.0 mm 250 HP 250 · 250A, 250E, 250G · 90→10 BR8HS-10 BR8HIX 1.0 mm 250 HP 250 · 250B · 97→03 BR9HS-10 BR9HIX 1.0 mm 250 HP 250 · F250A, F250B, F250D, F250L, F250N, · 06→21 LFR6A-11 ILFR6T11 1.1 mm 250 HP 250 · FL250A, FL250B, FL250D, FL250L · 06→21 LFR6A-11 ILFR6T11 1.1 mm 250 HP 250 · L250A · 90→06 BR8HS-10 BR8HIX 1.0 mm 250 HP 250 · L250B · 97→03 BR9HS-10 BR9HIX 1.0 mm 250 HP 250 · L250G · 06→10 BR8HS-10 BR8HIX 1.0 mm 250 HP 250 · LZ250D · 03→07 BKR6EKU BKR6EIX 250 HP 250 · SL250A · 97→97 BR8HS-10 BR8HIX 1.0 mm 250 HP 250 · Z250D, Z250F · 03→07 BKR6EKU BKR6EIX 300 HP 300 · F300A, F300B, F300C, F300D, F300F, · 08→21 LFR6A-11 ILFR6T11 1.1 mm 300 HP 300 · FL300A, FL300B, FL300C, FL300D · 08→21 LFR6A-11 ILFR6T11 1.1 mm 300 HP 300 · LZ300A · 04→07 BKR6EKU BKR6EIX 300 HP 300 · Z300A · 04→07 BKR6EKU BKR6EIX 345 HP 345 · F350A · 08→ LFR6A-11 ILFR6T11 1.1 mm BLASTER WB700 BR8HS BR8HIX 0.6 mm EXCEL V6 · 87→89 BR9HS-10 BR9HIX 1.0 mm FX1 FX700 BR8HS BR8HIX 0.6 mm MJ500S/T B7HS BR7HIX 0.6 mm RAIDER RA700, RA700A BR8HS BR8HIX 0.6 mm RAIDER RA1100 BR8HS BR8HIX 0.6 mm RUNNER RUNNER III, GP BR8HS BR8HIX 0.6 mm SUPERJET SJ650 BR8HS BR8HIX 0.6 mm SUPERJET SJ700 BR8HS BR8HIX 0.6 mm VENTURE WVT700 BR8HS BR8HIX 0.6 mm VXR WRB650 BR8HS BR8HIX 0.6 mm WJ500/F (89) B7HS BR7HIX 0.6 mm WR500/F (89) B7HS BR7HIX 0.6 mm Z-DRIVE Inline 4 BR6FS 0.6 mm Z-DRIVE V6 BR6FS 0.6 mm Z-DRIVE V8 BR6FS 0.6 mm Z-DRIVE V8 BR6FS 0.6 mm Z-DRIVE V8 BR6FS 0.6 mm Parts for these engines: [Yamaha parts](/collections/yamaha-marine-parts-outboard-engine-parts-components). ### 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 - [Mercury](/pages/ngk-spark-plugs-mercury-outboards) - [Mariner / Force](/pages/ngk-spark-plugs-mariner-force-outboards) - [Suzuki](/pages/ngk-spark-plugs-suzuki-outboards) - [Johnson](/pages/ngk-spark-plugs-johnson-outboards) - [Evinrude / OMC](/pages/ngk-spark-plugs-evinrude-omc-outboards) - [Tohatsu / Nissan](/pages/ngk-spark-plugs-tohatsu-nissan-outboards) - [Honda / Volvo Penta / others](/pages/ngk-spark-plugs-honda-volvo-penta-outboards) - [MerCruiser inboard](/pages/ngk-spark-plugs-mercruiser-inboard) - [Other inboards](/pages/ngk-spark-plugs-inboard-sterndrive) - [PWC & jet ski](/pages/ngk-spark-plugs-pwc-jet-ski) ### 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](tel:+61412532984) 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](/pages/resources), and the how-and-why lives in our [boat maintenance guides](/blogs/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. --- > Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/pages/ngk-spark-plugs-yamaha-outboards)