I was waiting for you to come in, Brian and foresaw this response.

When selecting a glow-plug heat range for an engine, it is a design decision.
Deciding how to perform the break-in, is experience based and also based on being able to change the way you think, about different engine designs.


I was also taught that break-in always requires a slobbery mixture setting.
...And I was also taught that during break-in, an engine may fail, once in a while...

I would have done it that way... But then I started thinking about what I was doing, as well as trying to figure out, who makes more sense about ABC type engines; The geezers with ringed and lapped engine experience, or George Aldrich, Clarence Lee and Harry Higley, with their informed, engineered reasoning.

I chose the later and then wrote about it.

And no, I cannot figure out why OS does not bother to differentiate, between ABC/ABN engines and ringed engines, as Super Tigre does, in regards to the break-in technique in their manuals.