In the absence of a manual, what might be a safe generic point gap setting. This is for a 12 v, 4 cylinder industrial flathead engine in a 1962 Hyster Forklift.
Currently, with a relatively new set of points installed by a 'professional', I cannot even slide an .011 business card between the points. This might account for why it is hard to start.
I checked the plugs. (this is a propane fired unit) and they were clean. I widened the plug gap from about .025 to .034 and it finally started right up.
I am actually in the process of installing a Pertronix Ignitor but I will save the points and want to know how to set them up should the need arise in the future.