Check Your Plugs!

[rv6ejguy]

For those using EI and auto plugs: We've heard from 2 customers now who were supplied with the wrong plugs and adapters for their engine by one of our competitors.



In particular, if you have an IO-390, these use long reach plugs and a long reach adapter. The engines ran, but these are not correct. To my knowledge, Lycoming paints the upper cylinder fins between the valves with yellow paint if they are designed for long reach plugs.

[rv6ejguy]

Here is the guidance from Lycoming: https://www.lycoming.com/sites/defau...s/SI1042AF.pdf