@wineman is there a reason you seem to not want to post any pictures or info on this?
I'm genuinely curious about how you had it set up to make it work and would love to see some pictures or even a video of it if you took a video of it running?
That's an amazing price!
What do you get for your $75, is there a manifold and boost pipes included?
Would you be able to post a link or even pm me the details please.
I'm curious, how much have you been quoted for the turbo and related parts to convert the engine you have?
And have the people who have been giving you advice on this actually shown you a running single cylinder mower engine with their turbo kit on it?
I use one of these for small engine oil changes.
https://www.ebay.co.uk/itm/352309765380?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&customid=CjwKCAjw7c2pBhAZEiwA88pOF47bgiVDldP17UwwpET4_nmg5zJrTvTTgomzN2Y8R2DjNRoCghxihRoCj2sQAvD_BwE
Have you tried to suck the oil out of it with an vacuum oil pump?
That's how I do most of my small engine oil changes now.
They're not alot of money, think I paid about £15 for mine and it's saved alot of trouble with oil changes plus there is zero mess to deal with after.
The same can be said for Makita, DeWalt and many other brands, but then that's what the 'other brands' forum is for, or atleast that's where I'd be asking.
Sorry @StarTech , that should have read fuel shut off solenoid.
If it has one, check it's working by removing it and applying power to it.
You should see the little plunger retract if it is working correctly.
If removing the fuel cap fixes the problem, I'd be guessing that it's the breather vent on the cap not working. Have you verified that the fuel cap vent is actually working on either cap?