</font><font color="blue" class="small">( Any gas engine usually requires considerable cranking after it has sat for a while, especially ones with carburetors )</font>
I'd say that is more related to the level of maintenance they receive, and the condition of the engine.
If your level of maintenance is: "I put gas in it when it needs to work".
Then yes.. I'd agree.. it will probably be a hard starter.
The majority of my antiques are still 6v.. Only one has been rebuilt that I know of, and that was 15 years ago.. the rest are setting on 50 year old engines or older.
Even after setting for as long as 6 months, I can turn the gas on, wait a few seconds for the carb bowl to fill, set throttle at 1/3 to 1/2 turn on the ignition, hit the starter button, and as the first rev is going, give a pull on the choke. By the end of the second rev, she starts. That's the startup ritual on my 6v ford 8n, 6v ford 660, and my 6v allis chalmers G. The 8n and 660 have been hard workers.
Soundguy