I just rebuilt a Yanmar 1GM10. A complete Head job, honed the cylinder and new rings, etc.. At start-up it acted like a runaway engine. Very high RPM and lots of black smoke. The kill switch did not stop it and any adjustment to the fuel actuator just made it run faster. I choked off the air intake and it almost stopped it but not quite. As soon as I loosened the fuel line at the injector it stopped. This tells me it is getting way too much fuel. Am I correct? I did not replace the fuel injection pump as it was working fine before my rebuild. How do I check it?