G230 gas combine engine governor?

DrAllis wrote: Engineers design governors to operate at different speeds and different droop RPM ranges. The tractor governor is designed for variable speed operation and the combine is not.

This is EXACTLY the case... and most guys don't understand.

The combine isn't a multi-purpose draft machine, it's a specific purpose application, where there is a half-dozen or more mechanisms that need motive power from that engine, and those mechanisms don't work properly at anything BUT their designed speed.

There is a substantial difference between a 'fixed speed' governor, and a 'variable speed' governor.  A synchronous generator is another application with 'fixed speed'... it will not work properly in a tractor, because it's designed around synchronous speed operation.

In same way, most people misinterpret horsepower ratings between combine and tractor engines, in essentially the same way.  A tractor's horsepower is defined by either PTO, belt, or drawbar horsepower, which includes all static losses that exist inside the machine like driveline friction, hydraulic pump, etc.  A combine engine includes NO static losses... just the amount of horsepower which is available at the flywheel, and that's a fair chunk LESS loss than a tractor exhibits.  In reality, the actual output will be essentially the same, with exception that the combine's 'power unit' will not want to run at anything other than idle, or governed run speed.