When should you change the spark plugs and the ignition coils? And how many ingnition coil are there?

 

There are 4 ignition coils. 2 for each rotor.

 

Oh boy!

 

I plan to change both at 30k - barring any issues before that.

Plugs could need changed every 15k if you do not run enough cleaners and are seeing misfires. Also, coils could be sooner if you live in a hot climate as they are notorious for overheating/scorching, but also have been stretched to 60k and beyond by some with no issues either.

Bottom line is keeping in touch with how your Renesis is running and adjust changing these out accordingly.

Don't forget your plug wires either - good idea to swap them out at least every 60k as well (if not sooner)