Originally Posted by
lozza1965
Thank you for the quick reply, I have no idea why they are so bloody messy, mates fly other makes of radials and have very clean running engines, just wonder if the cylinders are not burning the oil off, not getting hot enough, all I know is its really screwing the painted solartex finish.
Does yours take a few mins to come up to full RPM? Mine usually requires at least 3-4 minutes of revving it up on the ground before the bottom cylinders light. It makes a lot of black gunk during this phase for sure.
I seem to have the blank gunk issues on my Saito radials as well.