Got another OS .18, Put er in the FF and heat cycled it for quite a few tanks. No problems

That was about 2 weeks ago and I got it out today and started it up.
I started her up with no problems and just ran it around slowly to warm up and check temps and it was about 220 and had Tons of blue smoke and no power when i throttled it. So I leaned it out a fair bit and let it run again and it would do a serious bog at half throttle. It seemed to have a nice smoke trail so i checked temps and it was 240. So I leaned it out just a wee bit and the bog got worse. Then I was like ... uh ok, So I richened it up and it actually reduced the bog but with massive smoke trail and not even near the power it should have.

It seems to Idle fine and it doesnt bog off the line. Then it stalled and I wasnt able to restart it. I tried new plugs and everything, glow ignitors are fresh and I tried 3 different ones before giving up for the day. fuel tank was full of good fresh fuel.

So basically, it has a bad bog and its running at 220 - 240 but if I lean it out it bogs worse and if i richen it it doesnt bog but has no power and tons of smoke. And I can't restart it hot.

I'm kinda thinking vapor lock but i have the line away from the cooling head as much as I can with the OFNA tank and the fuel line measure 90 degrees F.

any clues anyone???

Thanks