yes I have have poured a bit of fuel/ oil in the spark plug hole. I pulled it many times to start it and it would not start. I could smell the exhaust so the cut of switch is correct and it is getting fuel in the carburettor and I could still smell the exhaust from trying to start it even without pouring some fuel in it. This is still a great tip. would you pull out the piston and rings even if they are scored since the compression is 79 psi?

So correct me if i'm wrong please. from what I gather from the videos, I block the muffler port, carburettor port, spark plug and decompressor port. To pressurise or create a vacuum, I attach a hose onto a nipple to a backing plate I make up and attach it to the carburettor. If it does it not matter any where I place the nipple, I can get a brass threaded fitting and braze a nipple on to it and attach it onto the spark plug port as it would be easier to braze a nipple onto a brass thread fitting then to a steel plate. Do I have to move the piston around or place it anywhere? Finally, what result should I get for the pressure and vacuum. It could be a top or bottom seal or the case seal. Thanks for you help.