Larry wrote:
Larry wrote in
:


I could see it would carbon up if you just ran the engines in an
unloaded condition in neutral for long periods of time....


Thinking about this, I cannot help but think about those engines in the big
trucks that are left idling for 8 hours, virtually unloaded, while the
driver is sleeping in his sleeper at the truck stop. I suppose he burns
off all the deposits when he drives off down the interstate in the morning.

You need to develop enough reject heat to keep the cylinder walls hot
enough to prevent wet stacking.

The spec I always seen is to idle somewhere between 1,300-1,500 RPM,
depending on engine.

Lew