Everest sent me a bum piston and the issue is not resolved, rather I just gave up dealing with them.
I have looked long and hard at my OEM part and its not bad, its just not great.
I sprayed some of this on it to remove the varnish and gunk.
This is a methyl chloride based cleaner stripper.
I am not even sure they make it anymore…
awful stuff that makes your skin crawl and tingle if you get any on you ( REALLY DO NOT GET THIS ON YOU )
By God does it work however…
removes carbon and wood gas tar and every other manner of things between metal and you.
Anything that works these days is bound to be toxic or banned in most places…
Piston BTW looks OK under the crud.
Not much else to do so I pulled this projects little brother out and did the yearly service on
" Dooms-Day "
This little k90 powered 1.5RM21 manufactured in the 50s got an oil change, new plug, 1500 watt load test for around 45 minutes.
It’s now oiled up and wrapped in plastic sheeting until its next check in.
I will not start it again for a year, but I made an entry in it’s log bog
Take care of your stuff and it will work for you when the lights are out.
Keep a spare too!