Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Is there an electric solenoid in the base of the carburetor? Deere shows that there is one on the newer models of the 425. It plugs the main jet of the carburetor until the key is turned on, and has to stay open at all times the key is on. It requires 12 volts to open and stay open. Ths would keep the fule from the cylinders. See link below for solenoid. # 26 in this model.
Do you have 12 volts to it with the key on? And if you remove it and have the wire attached, does it retract when key is turned on?
Yes, it is a common part. Or you can purchase from a Kawasaki dealer or from Ebay. Or you could remove the tip and use it as a dummy! It is anti-backfire solenoid, it keeps the engine from backfiring when engine is turned off hot. Deere # is MIU11222---Solenoid
I see question is still open, did you get the solenoid ?