I have a homelite LR4300 with the 7.5 HP Subaru engine. The governor is not working. Whats the poblem?

Unclear when stated that there is a governor issue? I assume you have a Robin/Subaru 7.5 H.P. engine model EY280YD2510 with erratic behavior leading up to stalling out when a load is applied or the generator is at no load status after several minutes of run time?. Couple of things to check would be starting with the fuel system. Is there stale gas in the fuel tank? Have you verified fuel flow from tank? Is the fuel cutoff valve free of debris? Is the carb fuel bowel been removed and inspected for varnish? Is the air cleaner clean? Next, Ignition system. Have you inspected the flywheel for excessive rust? Have you reset the air gap on the ignition module? Does the on/off switch work (measured with a meter for continuity?) Any visual signs of damage with all wiring or the ignition module itself? I once thought I had an governor issue where the issue ended up being that the flywheel was corroded to the point that once the engine was fully warmed up the control module would contact the rust build up on the flywheel causing engine surges no matter what the load was on the generator, and at times would stall the engine. Clean flywheel off if necessary and reset the air gap on the ignition module. If that fails then inspect the governor spring (the top spring on the carb. linkage assembly) for excessive rust that will change the tension on the governor arm.Replace if in doubt! When doing all this inspecting ensure you have fresh fuel, oil, air filter, spark plug gapped correctly, and ignition module that has been tested as sound! These Robin engines are smooth running heavy duty engine that will perform for many years if taken care of. Good luck!