# 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](#crusader) - [Indmar](#indmar) - [PCM](#pcm) - [Marine Power](#marine-power) - [Yamaha](#yamaha) - [Johnson](#johnson) - [Evinrude](#evinrude) - [Bombardier (Sea-Doo)](#bombardier-sea-doo) - [Polaris](#polaris) - [U.S. Marine](#u-s-marine) ### 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](/collections/yamaha-marine-parts-outboard-engine-parts-components). ### 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](/collections/evinrude-johnson-outboard-parts-brp-marine-engine-parts-components). ### 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](/collections/evinrude-johnson-outboard-parts-brp-marine-engine-parts-components). ### 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](/pages/ngk-spark-plugs-mercury-outboards) - [Mariner / Force](/pages/ngk-spark-plugs-mariner-force-outboards) - [Yamaha](/pages/ngk-spark-plugs-yamaha-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) - [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-inboard-sterndrive)