Spark plug color

How many hours on the plugs? What's the gap and where is the white thermal paste? Looks like anti seize on the threads. Plug color is fine. You can see a small amount of lead. I don't think you have any worries, just clean them all and apply the correct plug thread thermal paste.

166 total time, 82hrs on plugs, gaped at .027, previous owner had some kind of lube on threads. I will gap new ones at .025 for summer?? and use thermal paste. I moved needle clip from 2nd to 3rd groove and will see how plugs look after ground run. Still wondering what to do about an egt or O2 sensor?

Thanks,  Ross

EGT sensors are important to determine proper mixture and to notify of potential problems in advance. I've never heard of O2 sensors for a rotax. There are sensor kits available if you don't have them already installed. I would be very surprised that a ULS did not have them already installed along with CHT TEMP Sensors as well!  

Ok I will have to find the right sensors to work with the MGL display. Open to suggestions.
Thank you,

Michigan Avionics (the US distributor for MGL) list several EGT probes on their website:

https://www.michiganavionics.com/product-category/engine-monitoring/

If you want to ask them specific questions about your engine or display, their contact info is here:

https://www.michiganavionics.com/contact-us/