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OMC spark plug

Champion Spark Plugs for OMC 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
90 HP
  DU 89 CID J4C — 0.03
  NU Series 1600CC RN9YC N9YC 0.025
88 HP
  DU 89 CID J4C — 0.03
80 HP
  NU Series 1600CC RN9YC N9YC 0.025
1999-1994   RL82C L82C 0.03
  1.8L QL77JC4 L77JC4 0.03
  115-SD 1.6L QL77JC4 L77JC4 0.03
  140-SD 2.0L QL77JC4 L77JC4 0.03
  15S10G RL82YC L82YC 0.045
  15S10S RL82YC L82YC 0.045
  15S11C RL82YC L82YC 0.045
  15S13A RL82YC L82YC 0.045
  15S14M RL82YC L82YC 0.045
  190-SD 2.6L UL77V — —
  2.5L UL77V — —
  225-SD 2.7L QL77JC4 L77JC4 0.03
  225-SD 3.0L QL77JC4 L77JC4 0.03
  275-SD 3.6L QL77JC4 L77JC4 0.03
  275-SD 4.0L QL77JC4 L77JC4 0.03
  AJ .460 Reach Tapered Seat RV15YC4 — 0.035
  AJ 3/8" Reach Gasket Seat RJ14YC — 0.035
1982-1974 All Models RV15YC4 — 0.035
1985-1973 All Models 14mm, Tapered Seat RV15YC4 — 0.035
  All Models 18mm, Tapered Seat RF10C — 0.03
  All Other Models 3 / 4" Reach Heads RN5C N5C 0.035
  AT .460 Reach Tapered Seat RV15YC4 — 0.035
  AT 3/8" Reach Gasket Seat RJ14YC — 0.035
1990-1987 Cobra 2.3L RS12YC — 0.035
1995 Cobra 3.0L RS12YC — 0.045
1992-1987 Cobra 3.0L RV15YC4 — 0.045
1995-1990 Cobra 3.0L HO RS12YC — 0.045
1995-1986 Cobra 4.3L V6 RV15YC4 — 0.035
1994-1993 Cobra 4.3L V6 HO RV15YC4 — 0.045
1991-1990 Cobra 4.3L V6 HO RV15YC4 — 0.035
1995-1986 Cobra 5.0L V8 Carb. RV15YC4 — 0.035
1995-1989 Cobra 5.0L V8 Carb. & Carb. HO RV15YC4 — 0.035
1995-1994 Cobra 5.0L V8 EFI RS12YC — 0.045
1993 Cobra 5.0L V8 EFI RV15YC4 — 0.045
1992-1986 Cobra 5.7L V8 RV15YC4 — 0.035
1995-1989 Cobra 5.8L V8 Carb. RV15YC4 — 0.035
1995-1992 Cobra 5.8L V8 EFI RS9YC — 0.045
1995-1990 Cobra 7.4L V8 Carb. & Carb. HO RV15YC4 — 0.045
1990-1986 Cobra 7.5L V8 RV15YC4 — 0.035
  CU RN5C N5C 0.035
  GU 153 CID RN5C N5C 0.035
  HU Series 225 CID RJ14YC — 0.035
  JU 250 CID RV15YC4 — 0.035
1992-1986 King 5.7L V8 RV15YC4 — 0.035
1995-1993 King Cobra 5.8L V8 HO EFI RS9YC — 0.045
1995 King Cobra 7.4L V8 EFI RV15YC4 — 0.045
1994-1992 King Cobra 8.2L V8 RV15YC4 — 0.045
  KU Series 283 CID RJ14YC — 0.035
  LU Series 153 CID RN5C N5C 0.035
1986-1978 Stringer Models RV15YC4 — 0.035
1986-1978 Stringer Models 4.3L V6 RV15YC4 — 0.035
  SU Series RN5C N5C 0.035
1996 SX Cobra 3.0L RS12YC — 0.045
1996 SX Cobra 4.3L V6 Eng.Tag NCA Reach .460" RV15YC4 — 0.035
1996 SX Cobra 4.3L V6 Eng.Tag NCS Reach .708" Short RS12YC — 0.035
1996 SX Cobra 5.0L V8 Carb. RV15YC4 — 0.035
1996 SX Cobra 5.0L V8 EFI RS12YC — 0.045
1996 SX Cobra 5.7L V8 RV15YC4 — 0.035
1996 SX Cobra 5.8L V8 Carb. RV15YC4 — 0.035
1996 SX Cobra 5.8L V8 EFI RS9YC — 0.045
1996 SX Cobra 7.4L V8 RV15YC4 — 0.045
1996 SX Cobra 8.2L V8 RV15YC4 — 0.045
  TJ .460 Reach Tapered Seat RV15YC4 — 0.035
  TJ 3/8" Reach Gasket Seat RJ14YC — 0.035
  TT .460 Reach Tapered Seat RV15YC4 — 0.035
  TT 3/8" Reach Gasket Seat RJ14YC — 0.035
  TU-14 300 CID V8 RJ14YC — 0.035
  TU-15 300 CID V8 RJ14YC — 0.035
  TU-16 300 CID V8 RJ14YC — 0.035
  TU-17 283 CID V8 RJ14YC — 0.035
  TU-17 307 CID V8 RJ14YC — 0.035
  TU-19 283 CID V8 RJ14YC — 0.035
  TU-19 307 CID V8 RJ14YC — 0.035
  TU-20 RV15YC4 — 0.035
  TU-21 RV15YC4 — 0.035
  VU Series 153 CID RN5C 0.035
  WU Series 250 CID RV15YC4 N5C 0.035
  XU-20C RV15YC4 — 0.035
  XU-20S RJ14YC — 0.035

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