Watched your video Ed. I think Buck is correct.
Leave the magneto lever near the 4:00 o’clock
position. Then keep closing the mixture screw
until it takes off. Then you’ll need to pull the
trimming lever back some to slow it down.
That looks like a really nice example.
Should be a great running motor once
you become familiar with it.
Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.