I have a friend that swears by spraying down under the cowling with CLR after every trip. It does look pretty under there does anyone else do this? Is this a good practice? Thanks.
Agree with that 100%I would NOT use CLR on my engine under any circumstances.
I use CorrosionX about 5x a year. A little goes a long way. Under the cowling looks brand new.
The Yamalube spray silicone protectant works well also. The Merc racing guys I know use CRC 5-56 with great results as well.