I too have posted this several times and teach it at Stovebolt gatherings.
In practice it may take 10 minutes altogether.
Some people obsess over various ways to turn the engine..
Easy enough to grab the fan and if needed push on slack part of belt to add tension with other hand.
Not applicable here, but to not leave anyone hanging. For Detroit diesel 2 cycle the injector is operated by rocker arm, so it is the indication that that cylinder is on TDC. And when exhaust valves just close then injector can be timed, all on same cylinder.
Grigg
