NGK Spark Plugs: Crusader, Indmar, PCM & Other Inboards
NGK Spark Plugs: Crusader, Indmar, PCM & Other Inboards
141 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.
Crusader 47 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| 200 cu.inch | 79→79 | BPR6FS | 0.9 mm | |
| 229 cu.inch | 165 · 79→80 | BPR6FS | 0.9 mm | |
| 229 cu.inch | CH185 · 81→84 | BPR6FS | 0.9 mm | |
| 262 cu.inch | 85→98 | BPR6FS | 0.9 mm | |
| 292 cu.inch | 185 · 71→80 | BP7FS | 0.9 mm | |
| 305 cu.inch | 190, 220 · 76→96 | BPR6FS | 0.9 mm | |
| 307 cu.inch | 210 · 71→80 | BP7FS | 0.9 mm | |
| 350 cu.inch | 270 · 71→98 | BPR6FS | 0.9 mm | |
| 427 cu.inch | 427 · 68→80 | BP7FS | 0.9 mm | |
| 454 cu.inch | 350 · 72→80 | BPR6FS | 0.9 mm | |
| 454 cu.inch | 454 · 81→98 | BPR6FS | 0.9 mm | |
| 460 cu.inch | 350 · 74→75 | BPR6FS | 0.9 mm | |
| 502 cu.inch | 502 · 89→98 | BPR6FS | 0.9 mm | |
| BOAT BUILDER | 170J, 185 9.5 mm reach plugs | B6S | 0.6 mm | |
| BOAT BUILDER | 200J, 210, 230, 230J | B6S | 0.6 mm | |
| BOAT BUILDER | CS100, CS150, CS165 | B6ES | 0.8 mm | |
| BOAT BUILDER | CS180, CS220, CS250 | B6S | 0.8 mm | |
| BOAT BUILDER | CS280, CS320 19 mm reach plugs | B6ES | 0.8 mm | |
| CHAMPION | 305 cu.inch | BPR6FS | 0.9 mm | |
| CHAMPION | Incl. HT · 350 cu.inch | BPR6FS | 0.9 mm | |
| CHAMPION | 454 cu.inch | BPR6FS | 0.9 mm | |
| CHARGER | CS185, CS220, CS250 | B6S | 0.6 mm | |
| CHARGER | CS280, CS320 19 mm reach plugs | B6ES | 0.9 mm | |
| CLASSIC | 5.7 · 5.7L Plus EFI, MPI | BPR5EFS | PTR5D-10 | 1.1 mm |
| CLASSIC | 7.4 · 7.4L MPI (Excl. HO) | BPR5EFS | PTR5D-10 | 1.1 mm |
| CLASSIC | 7.4 · 7.4L HO MPI 11.2 mm reach plugs | BR6FS | 1.1 mm | |
| CLASSIC | 8.2 · 8.2L MPI | BR6FS | 1.1 mm | |
| GM ENGINES | 5.0 · 5.0L MP · V8 275 hp · 05→ | PTR5D-13 | TR5AI-13 | 1.5 mm |
| GM ENGINES | 5.7 · 5.7L MP · V8 220 hp · 05→ | PTR5D-13 | TR5AI-13 | 1.5 mm |
| GM ENGINES | 5.7 · 5.7L Carb. · V8 300 hp | PTR5D-13 | TR5AI-13 | 1.5 mm |
| GM ENGINES | 6.0 · 6.0L MP · V8 375 hp | PTR5D-13 | TR5AI-13 | 1.5 mm |
| GM ENGINES | 8.1 · 8.1L MP · V8 385 hp | PTR5D-13 | TR5AI-13 | 1.5 mm |
| GM ENGINES | 8.1 · 8.1L MP (HO) · V8 425 hp | PTR5D-13 | TR5AI-13 | 1.5 mm |
| MARK | Mark 140, 170, 200, 225 | B6S | 0.6 mm | |
| MARK | Mark 240 | B6ES | 0.8 mm | |
| MARK | Mark 275 | B8S | 0.8 mm | |
| MARK | Mark 280 | B6ES | 0.8 mm | |
| MARK | Mark 300, 325 | B8S | 0.8 mm | |
| PLATINUM | 5.7 · 5.7L Plus MPI | BPR5EFS | PTR5D-10 | 1.1 mm |
| PLATINUM | 7.4 · 7.4L MPI (Excl. HO) | BPR5EFS | PTR5D-10 | 1.1 mm |
| PLATINUM | 7.4 · 7.4L HO MPI 11.2 mm reach plugs | BR6FS | 1.1 mm | |
| PLATINUM | 8.2 · 8.2L MPI | BR6FS | 1.1 mm | |
| XL/XLI | 262 cu.inch | BPR6FS | 0.9 mm | |
| XL/XLI | 305 cu.inch | BPR6FS | 0.9 mm | |
| XL/XLI | 350 cu.inch | BPR6FS | 0.9 mm | |
| XL/XLI | Incl. HO · 454 cu.inch | BPR6FS | 0.9 mm | |
| XL/XLI | 502 cu.inch | BPR6FS | 0.9 mm |
Indmar 28 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| 4-CYL. GM | 3.0 · 3.0L · 4-Cyl. | BR6FS | 0.9 mm | |
| 6-CYL. GM | 4.3 · 4.3L · V6 EFI | BR6FS | 1.1 mm | |
| 8-CYL. GM BIG BLOCK | 6.0 · 6.0L · V8 · 03→05 | PTR5D-13 | TR5AI-13 | 1.5 mm |
| 8-CYL. GM BIG BLOCK | 7.4 · 7.4L Incl. H.O. 11.2 mm reach plugs · V8 Carb, EFI · →97 | BR6FS | 1.1 mm | |
| 8-CYL. GM BIG BLOCK | 7.4 · 7.4L Incl. H.O. 17.5 mm reach plugs · V8 · 98→99 | BPR6EFS | BPR6EFIX-10 | 1.1 mm |
| 8-CYL. GM BIG BLOCK | 7.4 · 7.4L 17.5 mm reach plugs · V8 · 03→05 | BPR5EFS | PTR5D-10 | 1.1 mm |
| 8-CYL. GM BIG BLOCK | 8.1 · 8.1L Vortec · MPI · 03→05 | PTR5D-13 | TR5AI-13 | 1.5 mm |
| 8-CYL. GM BIG BLOCK | 8.2 · 8.2L Incl. H.O. 11.2 mm reach plugs · V8 · →97 | BR6FS | 1.1 mm | |
| 8-CYL. GM BIG BLOCK | 8.2 · 8.2L 17.5 mm reach plugs · V8 · 98→99 | BPR6EFS | BPR6EFIX-10 | 1.1 mm |
| 8-CYL. GM BIG BLOCK | 8.2 · 8.2L · V8 · 03→05 | BPR5EFS | PTR5D-10 | 1.1 mm |
| 8-CYL. GM SMALL | 5.0 · 5.0L 230, 230SP · V8 | BR6FS | 1.1 mm | |
| BLOCK | 5.7 | BR6FS | 0.9 mm | |
| BLOCK | 5.7 | BR6FS | 0.8 mm | |
| BLOCK | 5.7 | BR6FS | 1.1 mm | |
| BLOCK | 5.7 | PTR5D-13 | TR5AI-13 | 1.2 mm |
| BLOCK | 5.7 | BPR5EFS | PTR5D-10 | 1.0 mm |
| BLOCK | 5.7 | PTR5D-10 | TR5AI-13 | 1.0 mm |
| BLOCK | 5.7 | PTR5D-13 | TR5AI-13 | 1.2 mm |
| BLOCK | 5.7 | IZTR5B11 | 1.3 mm | |
| BLOCK | 5.7 | BPR6EFIX-10 | 0.8 mm | |
| BLOCK | 5.7 | BPR6EFIX-10 | 1.0 mm | |
| BLOCK | 6.6 · 6.6L · V8 | BR6FS | 1.1 mm | |
| CADILLAC 279 cu.inch | 4.6 · 4.6L Northstar · MPI | PTR5D-13 | TR5AI-13 | 1.5 mm |
| FORD 302 cu.inch | 5.0 · 5.0L 200 · V8 · 91→95 | BPR5FS-11 | 1.1 mm | |
| FORD 302 cu.inch | 5.0 · 5.0L 225 · V8 · 91→97 | BPR5FS | 0.9 mm | |
| FORD 351 cu.inch | 5.8 · 5.8L 250 · V8 · 91→97 | BPR5FS | 0.9 mm | |
| FORD 351 cu.inch | 5.8 · 5.8L 285 H.O. · V8 · 91→97 | BPR6EFS | BPR6EFIX-10 | 1.1 mm |
| FORD 460 cu.inch | 7.5 · 7.5L · V8 · 76→84 | BPR5FS | 0.9 mm |
PCM 12 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| 150 cu.inch | BPR4FS-11 | 1.1 mm | ||
| 200, 220, 229 cu.inch | BPR4FS-11 | 1.1 mm | ||
| 230, 250, 280 cu.inch | BPR4FS-11 | 1.1 mm | ||
| 302, 305 cu.inch | Dia. 14 mm plug | BPR4FS-11 | 1.1 mm | |
| 350, 351 cu.inch | Dia. 14 mm plug | BPR4FS-11 | 1.1 mm | |
| 454, 460 cu.inch | Dia. 14 mm plug | BPR4FS-11 | 1.1 mm | |
| 5.7L | HO (Excl. Ski) 17.5 mm reach plugs · MPI | BPR5EFS | PTR5D-10 | 1.1 mm |
| 5.7L | HO Ski 11.2 mm reach plugs · TBI 275 hp | BPR4FS-11 | 1.1 mm | |
| 5.8L | 11.2 mm reach plugs · Carb. 260 hp | BPR6FS | 0.7 mm | |
| 5.8L | HO 17.5 mm reach plugs · MPI 310 hp | BPR5EFS | PTR5D-10 | 1.1 mm |
| 7.4L | (Excl. HO) 17.5 mm reach plugs · MPI | BPR5EFS | PTR5D-10 | 1.1 mm |
| 7.4L | Incl. HO 11.2 mm reach plugs · Carb. TBI 350 hp | BPR4FS-11 | 1.1 mm |
Marine Power 15 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| INBOARD 4-CYL. | 3.0 · 3.0L 19 mm reach, gasket seat plugs · 181 cu.inch L4 · 75→78 | BR6ES | 0.9 mm | |
| INBOARD 4-CYL. | 3.0 · 3.0L 11.2 mm reach, taper seat plugs · 181 cu.inch L4 · 75→91 | BR6FS | 0.9 mm | |
| INBOARD 4-CYL. | 3.0 · 3.0L 17.5 mm reach, taper seat plugs · 181 cu.inch L4 · 92→00 | BPR6EFS | BPR6EFIX-10 | 0.9 mm |
| INBOARD 6-CYL. GM | 4.3 · 4.3L 11.2 mm reach plugs · 262 cu.inch V6 · 95→97 | BR6FS | 0.9 mm | |
| INBOARD 6-CYL. GM | 4.3 · 4.3L 17.5 mm reach plugs · 262 cu.inch V6 · 98→00 | BPR5EFS | PTR5D-10 | 0.9 mm |
| INBOARD 8-CYL. GM | 7.4 · 7.4L B, BM, Premium · 454 cu.inch V8 330 hp · 75→00 | BR6FS | 0.9 mm | |
| INBOARD 8-CYL. GM | 7.4 · 7.4L (L29) 17.5 mm reach plugs · 454 cu.inch V8 · 00→ | BPR6EFS | BPR6EFIX-10 | 0.9 mm |
| INBOARD 8-CYL. GM | 8.2 · 8.2L (Incl. Premium) · 502 cu.inch V8 · 95→97 | BR6FS | 0.9 mm | |
| INBOARD 8-CYL. GM | 8.9 · 8.9L · 540 cu.inch V8 550 hp · 95→97 | BR6FS | 0.9 mm | |
| INBOARD 8-CYL. GM | 5.0 · 5.0L G, K, LV · 305, 307 cu.inch V8 215 hp · 75→86 | BR6FS | 0.9 mm | |
| SMALL BLOCK | 5.0 · 5.0L · 305 cu.inch · 00→ | BPR5EFS | PTR5D-10 | 0.9 mm |
| SMALL BLOCK | 5.7 · 5.7L FLV, GLV, K, Q Series · 350 cu.inch V8 250, 300 hp · 75→91 | BR6FS | 0.9 mm | |
| SMALL BLOCK | 5.7 · 5.7L (Excl. Premium) · 350 cu.inch · 92→97 | BR6FS | 0.9 mm | |
| SMALL BLOCK | 5.7 · 5.7L Premium 17.5 mm reach plugs · 350 cu.inch · 92→97 | BPR6EFS | BPR6EFIX-10 | 0.9 mm |
| SMALL BLOCK | 5.7 · 5.7L · 350 cu.inch · 98→00 | BPR5EFS | PTR5D-10 | 0.9 mm |
Yamaha 14 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| 110 | 63→66 | B6ES | 0.8 mm | |
| 1100cc | 1.1 · 232 Limited · 08→ | CR9EB | CR9EIX | 0.8 mm |
| 1100cc | 1.1 · AR210, AR230, High Output · 03→08 | CR9EB | CR9EIX | 0.8 mm |
| 1100cc | 1.1 · Exciter 220 · 96→98 | BR8HS | BR8HIX | 0.6 mm |
| 1100cc | 1.1 · SR210, SR230, High Output · 03→ | CR9EB | CR9EIX | 0.8 mm |
| 1100cc | 1.1 · SX210, SX230, High Output · 03→ | CR9EB | CR9EIX | 0.8 mm |
| 1200cc | 1.2 · AR210 · 03→05 | BR8HS | BR8HIX | 0.6 mm |
| 1200cc | 1.2 · Exciter 135, 227, 270 · 98→99 | BR8HS | BR8HIX | 0.6 mm |
| 1200cc | 1.2 · LS210, LX210 · 03→05 | BR8HS | BR8HIX | 0.6 mm |
| 1200cc | 1.2 · LS2000, LX2000 · 99→03 | BR8HS | BR8HIX | 0.6 mm |
| 1200cc | 1.2 · XR1800 · 00→01 | BR8ES-11 | BR8EIX | 1.1 mm |
| STERN DRIVE | 3.0 · L4 3.0L | BR6FS | 0.9 mm | |
| STERN DRIVE | V6 | BR6FS | 0.9 mm | |
| STERN DRIVE | V8 | BR6FS | 0.9 mm |
Parts for these engines: Yamaha parts.
Johnson 7 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| CU, SU | 153 cu.inch 110, 120 hp | B6ES | 0.9 mm | |
| DU | 89 cu.inch 88, 90 hp | B6S | 0.8 mm | |
| HU | 225 cu.inch 150, 155 hp | BP5S | 0.9 mm | |
| KU | 283 cu.inch 185 hp | B6S | 0.9 mm | |
| NU | 1600cc 89, 90 hp | BPR5E | BPR5EIX | 0.7 mm |
| TU | 14, 15, 16 · 300 cu.inch 200 hp | BP5S | 0.9 mm | |
| TU | 17 · 283, 307 cu.inch 210 hp | B6S | 1.0 mm |
Parts for these engines: Johnson parts.
Evinrude 7 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| CU, SU | 153 cu.inch 110, 120 hp | BR6ES | 0.9 mm | |
| DU | 89 cu.inch 88, 90 hp | B6S | 0.8 mm | |
| HU | 225 cu.inch 150, 155 hp | BP5S | 0.9 mm | |
| KU | 283 cu.inch 185 hp | B6S | 0.9 mm | |
| NU | 1.6 · 1600cc 89, 90 hp | BP6ES | BPR6EIX | 0.6 mm |
| TU | 14, 15, 16 · 300 cu.inch 200 hp | BP5S | 0.9 mm | |
| TU | 17 · 283, 307 cu.inch 210 hp | B6S | 0.9 mm |
Parts for these engines: Evinrude parts.
Bombardier (Sea-Doo) 4 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| ROTAX ENGINES | 0.7 · Explorer | BR8ES | BR8EIX | 0.6 mm |
| ROTAX ENGINES | 0.7 · Speedster | BR8ES | BR8EIX | 0.5 mm |
| ROTAX ENGINES | 0.7 · Sportster | BR8ES | BR8EIX | 0.6 mm |
| ROTAX ENGINES | 0.8 · Challenger | BR8ES | BR8EIX | 0.6 mm |
Polaris 1 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| OPTIMAX 3.0L 250 HP | 3.0 · EX2100, LE2100 - Jet Drive · 04→ | PZFR5F-11 | ZFR5FIX-11 | 1.1 mm |
U.S. Marine 6 applications
| Model | Engine / details | NGK plug | Iridium upgrade | Gap |
|---|---|---|---|---|
| 3.0L | 3.0 · 181 cu.inch | BR5ES | 0.9 mm | |
| 5.0L | 5.0 · 305 cu.inch | BR6FS | 0.9 mm | |
| 5.7L | 5.7 · 350 cu.inch | BR6FS | 0.9 mm | |
| 5.8L | 5.8 · 351 cu.inch | BPR5FS-11 | 1.0 mm | |
| 7.4L | 7.4 · 454 cu.inch | BR6FS | 0.9 mm | |
| 7.5L | 7.5 · 460 cu.inch | BPR5FS-11 | 1.0 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
- Mercury
- Mariner / Force
- Yamaha
- Suzuki
- Johnson
- Evinrude / OMC
- Tohatsu / Nissan
- Honda / Volvo Penta / others
- MerCruiser inboard
- 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 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.