First time spark plug change

[Ajax]

Having some rpm fluctuations on starboard side. Hopefully changing the plugs fixes it. At minimum the plugs are 5 years old, possibly 11 years old. Not sure if previous owner ever changed them. All went smooth, 30 min job, all plugs came out with very little pressure. Plugs did not look that bad either.

 

[tdonoughue]

Many will recommend plug changes annually or bi-annually (I am now at bi-annually). You want that frequency not because the engine has so many hours on it that the plugs are bad, but so that you don't have corrosion locking your plugs into the head. Regular changes don't give corrosion a chance to take hold.

 

[Ajax]

Many will recommend plug changes annually or bi-annually (I am now at bi-annually). You want that frequency not because the engine has so many hours on it that the plugs are bad, but so that you don't have corrosion locking your plugs into the head. Regular changes don't give corrosion a chance to take hold.

Rpm fluctuations have up and vanished. I will be changing plugs bi-annually from here on out.