SPARK PLUGS

[orion208]

In a Volvo 4.3 penta engine I just pulled the plugs to change them they had RT43 AC plugs gapped at .035 are these plugs ok to use or should I go with Volvo plugs the engine seem to run finne all last season on the old ones.Thanks

 

[cobra 3.0]

Re: SPARK PLUGS

It's a GM engine, so AC plugs are great for your motor.

 

[crazy charlie]

Re: SPARK PLUGS

The block on that motor is GM and GM motors use AC Delco plugs ,so they sound fine to me.Charlie

 

[dmorley]

Re: SPARK PLUGS

Your motor is running fine with what you have, but just in case you want to know what merCruiser service bulletin No. 97-17 list for oem, it would be AC-MR43T if they are short reach plugs and AC-MR43LTS is they are long reach plugs. However, if "run on" ever becomes a problem that same service bulletin recommends the cooler plugs of AC-MR41T for short reach and NGK-TR6 or Chapion-RS9YC long Reach.

 

[orion208]

Re: SPARK PLUGS

Thanks for all your help,this board is a godsend!!