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Indmar

Indmar spark plug

Champion Spark Plugs for Indmar 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
  Cadillac 4.6L V8 MPI Northstar RS14PYP6 0.05
  Cadillac 6.0L V8 HO Vortec RS14PMPB5 0.06
  Chevrolet 4.3L V6 EFI RV12YC 0.035
  Chevrolet 400 CID V8 RV12YC 0.045
  Chevrolet 5.0L V8 Carb. RV12YC 0.045
  Chevrolet 5.7L V8 Carb. RV12YC 0.045
  Chevrolet 5.7L V8 EFI RV12YC 0.045
  Chevrolet 5.7L V8 EFI HO RS9YC 0.045
  Chevrolet 5.7L V8 Gen1 Carb. RS9YC 0.03
  Chevrolet 5.7L V8 Gen1 EFI RS9YC 0.045
  Chevrolet 5.7L V8 Gen1 HO EFI RS9YC 0.03
  Chevrolet 5.7L V8 HO Carb. RS9YC 0.045
  Chevrolet 5.7L V8 LT-1 EFI RS9YC 0.045
2002-1998 Chevrolet 7.4L V8 RS9YC 0.045
  Chevrolet 7.4L V8 Prior to 1998 RV12YC 0.045
2002-1998 Chevrolet 8.2L V8 RS9YC 0.045
  Chevrolet 8.2L V8 Prior to 1998 RV12YC 0.045
  Ford 5.0L V8 RV12YC 0.044
  Ford 5.8L V8 RV12YC 0.044
  Ford 5.8L V8 HO RS9YC 0.044
  Ford 7.5L V8 RV12YC 0.044
1982-1976 Oldsmobile 350 CID V8 RJ18YC 0.04
1982-1976 Oldsmobile 403 CID V8 RJ18YC 0.04
1976-1975 Oldsmobile 455 CID V8 RJ18YC 0.04