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OMC 30 Plug gap

B

blh72

New member
1989 4 cylinder OMC 3.0 Cobra.

1989 4 cylinder OMC 3.0 Cobra. Old plugs are gapped at .30; just bought new plugs and I cannot confirm the correct plug gap spec...HELP!
 
"You haven't mentioned the

"You haven't mentioned the model number of your engine, so I can't say for sure... also what plug are you using?

The Champion index shows:
  • plug number RS12YC at .045" gap
"
 
Engine Specs:
3.0 Litre
4&#3

Engine Specs:
3.0 Litre
4" bore x 3.6" stroke

Plugs I have is a ACDELCO R43TS
old plugs AC24 gapped at .30
 
"Brad,

I'm not sure wit

"Brad,

I'm not sure with that plug. Maybe someone else can help.

How did you identify that as the correct plug?"
 
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