See video on hand starting a Lister JP2M (marine) diesel engine (1434cc/pot, 26" flywheel). Cunning method employed to flick single decompressor off.
https://youtu.be/H5deIvEbA4AI have similar 1936 engine in my narrowboat but only hand started once
Richard, now I get the 'Old Thumper' avatar
Yes that was a take off of Ringwood Breweries bottle label for same name brew. They later changed the label in disgust
Note on video the compression change over handwheels being operated into low compression mode. The Ricardo design heads have an extra chamber to allow lower compression when running hard for less engine stress, or high for easy cold starts without need of heaters.
