It would work if you head
a giant heavy flywheel with lots of momentum mounted on the front of the engine.
When I traveled in the Saudi Desert, I saw men
hand start one cylinder diesels much larger than the Yanmar
. These diesels were used to pump water
from a well.
They would release the compression
on the engine, and then start turning the flywheel with a hand crank. They would get the heavy flywheel going at a good rate of speed, and then hit the compression lever, and the engine would start right up. The secret was the heavy flywheel that keeps the engine spinning then you hit the compression lever.
You didn't need to be superman to start the engine because you had the heavy flywheel do the work for you after you got the flywheel spinning.