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Mercruiser

Mercruiser spark plug

Champion Spark Plugs for Mercruiser Inboard Motors

Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. Please view the application guide below. You may also find the Champion spark plug code helpful.

Year Model / Engine Copper Plus Plug Alternate Plug Gap
1999-1993   QL77JC4 L77JC4 0.04
  1000SC Race (542 cid); GM V-8 502, 540 & 572 cid V8 N19V
  110; GM 4-Cyl. 153 cid L4 RN5C N5C 0.035
  120 3825578 and Below; GM 4-Cyl. 153 cid L4 RN5C N5C 0.035
  120 3825579 and Above; GM 4-Cyl. 153 cid L4 RV15YC4 0.035
  140 3826282 and Below; GM 4-Cyl. 181 cid L4 RN5C N5C 0.035
  140 3826283 and Above; GM 4-Cyl. 181 cid L4 RV15YC4 0.035
  140; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RN5C N5C 0.035
  150; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RN5C N5C 0.035
  160; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RN5C N5C 0.035
  165 2771483 and Below; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RN5C N5C 0.035
  165 2771484 and Above; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RV15YC4 0.035
  175, 185; GM V-6 262 cid V6 RV15YC4 0.035
  185; GM V-6 229 cid V6 RV15YC4 0.035
  190; GM V-8 283, 305, 327 & 350 cid V8 RJ12YC J12YC 0.035
  198; GM V-8 305, 327 & 350 V8 RV15YC4 0.035
  2.5L; GM 4-Cyl. 153 cid L4 RV15YC4 0.035
  200; GM 6-Cyl. 194, 230 & 292 cid 6-Cylinder RN5C N5C 0.035
  205; GM V-6 262 cid V6 RV15YC4 0.035
  215; Ford V-8 302 & 351 cid V8 RF10C 0.03
  225 2278646 and Below; GM V-8 283, 305, 327 & 350 cid V8 J4C 0.035
  225 2278647 and Above; GM V-8 283, 305, 327 & 350 cid V8 RJ12YC J12YC 0.035
  225; Ford V-8 302 & 351 cid V8 RF10C 0.03
  228, 230; INBOARD; GM V-8 305, 327 & 350 V8 RV15YC4 0.035
  228, 230; STERN DRIVE; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.035
  233 w / 14mm Heads; Ford V-8 302 & 351 cid V8 RV15YC4 0.03
  233 w / 14mm Heads; Ford V-8 302 & 351 cid V8 RV15YC4 0.035
  233 w / 18mm Heads; Ford V-8 302 & 351 cid V8 RF10C 0.03
  250 2317201-2797056; GM V-8 305, 327 & 350 V8 J4C 0.04
  250 2639854 and Below; GM V-8 283, 305, 327 & 350 cid V8 J4C 0.03
  250 4768000 and Above; GM V-8 283, 305, 327 & 350 cid V8 RV15YC4 0.035
  255 4175498 and Below w / 18mm Heads; Ford V-8 302 & 351 cid V8 RF10C 0.03
  255 4175499 and Above w / 14mm Heads; Ford V-8 302 & 351 cid V8 RV15YC4 0.03
  255 4175499 and Above w / 18mm Heads; Ford V-8 302 & 351 cid V8 RF10C 0.03
  255 w / 14mm Heads; Ford V-8 302 & 351 cid V8 RV15YC4 0.035
  255; GM V-8 283, 305, 327 & 350 cid V8 RV15YC4 0.035
  260; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.035
  262 Mag EFI Gen+ 0F803800-0L000000; GM V-6 262 cid V6 RS12YC 0.045
  270 w / Gasket Heads; GM V-8 283, 305, 327 & 350 cid V8 J4C 0.03
  270 w / Tapered Heads; GM V-8 283, 305, 327 & 350 cid V8 V63C 0.035
  280; GM V-8 283, 305, 327 & 350 cid V8 RV15YC4 0.035
  3.0L 0F353100 and Below; GM 4-Cyl. 181 cid L4 RV15YC4 0.035
  3.0L 0L010042 and Above; GM 4-Cyl. 181 cid L4 RS12YC 0.035
  3.0LX; GM 4-Cyl. 181 cid L4 RS12YC 0.035
  3.7L; Mercury Marine 4-Cyl. 224 cid L4 RV12YC 0.035
  3.7LX; Mercury Marine 4-Cyl. 224 cid L4 RV12YC 0.035
  300 Tempest; GM V-8 283, 305, 327 & 350 cid V8 RV15YC4 0.035
  320 EFI; GM V-8 283, 305, 327 & 350 cid V8 RV15YC4 0.035
  325 2761141 and Below; GM V-8 427, 454 & 482 cid V8 N19V
  325 2762441 and Below; GM V-8 427, 454 & 502 cid V8 N19V
  325 2762442 and Above; GM V-8 427, 454 & 502 cid V8 V63C 0.035
  325 3043030 and Above; GM V-8 427, 454 & 482 cid V8 V63C 0.035
  330 (B-W); GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  330; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  330; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.035
  340; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.035
  350 Mag (Carb); GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  350 Mag (Carb); GM V-8 350 & 454 Ski Eng. V8 RV91MC 0.04
  350 Mag EFI 0F799999 and Below; GM V-8 350 & 454 Ski Eng. V8 RV91MC 0.04
  350 Mag EFI Gen+ 0F800000 and Above; GM V-8 350 & 454 Ski Eng. V8 RS12YC 0.045
  350 Mag EFI Gen+ 0F800500 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  350 Mag EFI / MP 0F602199 and Below; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  350 Mag EFI / MP 0F799999 and Below; GM V-8 350 & 454 Ski Eng. V8 RV91MC 0.04
  350 Mag MPI (Horizon) 0L304700 and Above; GM V-8 305, 327 & 350 V8 RV17PMC4 0.035
  350 Mag MPI 0F799999 and Below; GM V-8 350 & 454 Ski Eng. V8 RV91MC 0.04
  350 Mag MPI Gen+ 0F602000 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  350 Mag MPI Gen+ 0L002008 and Above; GM V-8 305, 327 & 350 V8 RS12YC 0.045
  350 Mag MPI Gen+ 0L002600 and Above; GM V-8 350 & 454 Ski Eng. V8 RS12YC 0.045
  350 Mag MPI Gen+ 0L604000 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12PYP 0.035
  350; GM V-8 427, 454 & 502 cid V8 V63C 0.035
  370, 400; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  377 Scorpion 0L416146 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  390; GM V-8 427, 454 & 482 cid V8 XEN14 0.035
  390; GM V-8 427, 454 & 502 cid V8 XEN14 0.035
  4.3 Gen+ 0L010065 and Above; GM V-6 262 cid V6 RS12YC 0.045
  4.3L 0F802999 and Below; GM V-6 262 cid V6 RV15YC4 0.04
2002        
  4.3L MPI; GM V-6 262 cid V6 RV15YC4 0.04
  4.3LH Gen+ 0L010044 and Above; GM V-6 262 cid V6 RS12YC 0.045
  4.3LL EFI Gen+ 0L012009 and Above; GM V-6 262 cid V6 RS12YC 0.045
  4.3LX 0F802999 and Below; GM V-6 262 cid V6 RV15YC4 0.04
  4.3LX Gen+ 0F803000-0L000000; GM V-6 262 cid V6 RS12YC 0.045
  4.3LXH Gen+ 0F803000-0L000000; GM V-6 262 cid V6 RS12YC 0.045
  400 Cyclone; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  400 Jet; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.035
  420; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.032
  440 Cyclone; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  454 EFI / MP; GM V-8 350 & 454 Ski Eng. V8 RV15YC4 0.04
  454 Mag Alpha; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  454 Mag Bravo; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  454 Mag EFI / MP; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  454 Mag MPI (Horizon) 0L002200 and Above; GM V-8 427, 454 & 502 cid V8 RV17PMC4 0.04
  454 Mag MPI 0L604250 and Above; GM V-8 427, 454 & 482 cid V8 RV17PMC4 0.035
  454 Mag MPI; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  454 MPI; GM V-8 350 & 454 Ski Eng. V8 RV15YC4 0.04
  460 Cyclone; GM V-8 427, 454 & 482 cid V8 V63C 0.035
  470, 165, 170; Mercury Marine 4-Cyl. 224 cid L4 RV12YC 0.035
  470; Mercury 4-Cyl. 224 cid L4 RV9YC 0.035
  475 Turbo; GM V-8 427, 454 & 482 cid V8 V63C 0.035
  485; Mercury Marine 4-Cyl. 224 cid L4 RV12YC 0.035
  488, 180, 190; Mercury Marine 4-Cyl. 224 cid L4 RV12YC 0.035
  496 Mag HO; GM V-8 427, 454 & 482 cid V8 RS14PMPB5 0.06
  496 Mag; GM V-8 427, 454 & 482 cid V8 RS14PMPB5 0.06
  5.0L 0L000000 and Below; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.035
  5.0L EFI Gen+ 0L012052; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.0L Gen+ 0L015751; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.0L MPI; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.0L; GM V-8 305, 327 & 350 V8 RV91MC 0.035
  5.0LX; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.035
  5.7L 0L000000 and Below; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  5.7L 0L000000 and Below; GM V-8 305, 327 & 350 V8 RV91MC 0.04
  5.7L Comp 0L000000 and Below; GM V-8 350 & 454 Ski Eng. V8 RV91MC 0.04
  5.7L Comp Gen+ 0L002005 and Above; GM V-8 350 & 454 Ski Eng. V8 RS12YC 0.045
  5.7L EFI 0L000000 and Below; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  5.7L EFI Gen+ 0L010035 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.7L EFI Gen+; GM V-8 305, 327 & 350 V8 RS12YC 0.045
  5.7L Gen+ 0L002003 and Above; GM V-8 305, 327 & 350 V8 RS12YC 0.045
  5.7L Gen+ 0L010037 and Above; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.7LX EFI Gen+; GM V-8 283, 305, 327 & 350 cid V8 RS12YC 0.045
  5.7LX EFI; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  5.7LX; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.04
  502 Mag (Carb.); GM V-8 502, 540 & 572 cid V8 RV15YC4 0.04
  502 Mag EFI / MP; GM V-8 502, 540 & 572 cid V8 RV15YC4 0.04
  502 Mag MPI; GM V-8 502, 540 & 572 cid V8 RV15YC4 0.04
  600SC; GM V-8 502, 540 & 572 cid V8 V63C 0.035
  60; MCM Renault 4-Cyl. Engines L4 RL82C L82C 0.025
  7.4L Alpha; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  7.4L Bravo; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  7.4L EFI / MP; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  7.4L EFI; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  7.4L MPI (L29) 0L002006 and Above; GM V-8 427, 454 & 502 cid V8 RS12YC 0.045
  7.4L MPI (L29) 0L010003 and Above; GM V-8 427, 454 & 482 cid V8 RS12YC 0.045
  7.4L MPI 0L000000 and Below; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  7.4L TR OB771113-OC407646; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  7.4L; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  7.4LX EFI; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  7.4LX MPI; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  7.4LX MPI; GM V-8 427, 454 & 502 cid V8 RS12YC 0.045
  8.1S HO; GM V-8 427, 454 & 502 cid V8 RS14PMPB5 0.06
  8.1S Horizon; GM V-8 427, 454 & 502 cid V8 RS14PMPB5 0.06
  8.2L Carb.; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  8.2L MPI; GM V-8 427, 454 & 502 cid V8 RV15YC4 0.04
  800SC; GM V-8 502, 540 & 572 cid V8 V63C 0.035
  80; MCM Renault 4-Cyl. Engines L4 RN9YC N9YC 0.025
  888 4169596 and Below; Ford V-8 302 & 351 cid V8 RF10C 0.03
  888 4169597 and Above 14mm Heads; Ford V-8 302 & 351 cid V8 RV15YC4 0.03
  888 4169597 and Above 18mm Heads; Ford V-8 302 & 351 cid V8 RF10C 0.03
  898, 200; GM V-8 283, 305, 327 & 350 cid V8 RV91MC 0.035
  90; MCM Renault 4-Cyl. Engines L4 RN9YC N9YC 0.032
  Black Scorpion 0F800000 and Above; GM V-8 350 & 454 Ski Eng. V8 RS12YC 0.045
  HP425; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.035
  HP450; GM V-8 427, 454 & 482 cid V8 RV15YC4 0.04
  HP465; GM V-8 502, 540 & 572 cid V8 RV15YC4 0.035
  HP500 (502 cid); GM V-8 502, 540 & 572 cid V8 RV15YC4 0.04
  HP500 Bulldog (540 cid); GM V-8 502, 540 & 572 cid V8 V63C 0.035
  HP500 EFI (502 cid); GM V-8 502, 540 & 572 cid V8 RV15YC4 0.04
  HP525 SC; GM V-8 427, 454 & 482 cid V8 V63C 0.035
  HP525SC (454 cid); GM V-8 502, 540 & 572 cid V8 V63C 0.035
  HP575; GM V-8 502, 540 & 572 cid V8 V63C 0.035
  HP600SC Bobtail (502 cid); GM V-8 502, 540 & 572 cid V8 V63C 0.035
  HP800SC (572 cid); GM V-8 502, 540 & 572 cid V8 V63C 0.035
  HP900SC; GM V-8 502, 540 & 572 cid V8 N63YDR 0.035
  MX 6.2 MPI Horizon; GM V-8 427, 454 & 502 cid V8 RS9YC 0.045
  Scorpion 377; GM V-8 350 & 454 Ski Eng. V8 RS12YC 0.045