I have so many spare parts I am building a beater W350.
Yesterday I fired up the engine that had been sitting in the shop for around 10 years.
Prior to putting the engine on the stand long ago, I had run it and changed the oil.
To prep for firing, I had changed the fuel filter, installed rebuilt injectors and primed as much of the old fuel out of the system as possible.
After some time of cranking and bleeding the system, it fired up and took off like a screaming banshee!!
I was able to pull the hot lead to the fuel shut off solenoid and the engine shut down so it isn't a real runaway situation.
I still need to pull the top off the pump, but any suggestions as to why?
I'm thinking a broken governor spring, sticky governor....
There is no throttle response at all, just WOT and tons of smoke as I used a hard board to control RPM.