I see you have advanced the timing from your
last video. Now it seems to be where it needs to
be for starting. I would also think a restriction
somewhere in the fuel passages would be worth
investigating. Years ago I had a motor that kept
running out of fuel. Not an RBM. I disconnected
the fuel line several times and the flow seemed
adequate. Out of desperation I ran a pipe cleaner
with carb cleaner through the fuel line. Although
the pipe cleaner got a little dirty I didn’t think I
had found anything but it solved the problem.
In your case I would think the passage from the
mixture screw to the hole under the poppet
valve would be a place to start. Your refusal to
quit is going to lead to a running motor.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.