Husqvarna zthkh4218 pto clutch burns fuses. I pull pto switch blades engage make a pass or 2 blows fuse.

SOURCE: 2007 Husqvarna Riding mower blade will not engage

Sounds like you electric blade clutch is bad. I just had the same thing happen to my exmark mower. I was cutting grass and the engine just shut down. It would not crank over. Checked the fuses and replaced one blown fuse. The engine wanted to crank over but it was locked up. I looked the engine over and seen that the bearing in the electric clutch seized up causing the clutch to melt.

Testimonial: "Thank you! That doesn't sound like an inexpensive solution. We appreciate your help, though."

SOURCE: Husqvarna YTH2348 - blades wont engage,everything

there is an electric clutch, also called a PTO, which is on the lower end of the motor's drive shaft. If you look underneath the mower in the front you will see it, a belt is on it which goes to the deck and spins the blades. The PTO has an inline fuse which could have blown, unfortunately it is generally caked in old cut grass, spilled oil, and belt wear residue. You are going to have to get some light down there and take a long look at the PTO, find the wire coming from it, and follow it until you feel a bump in the wire, like a cat being digested inside a snake. Clean the bump well and you will see that it is really an in line fuse holder and you can take it apart and replace the fuse if it is bad. Having said that, when a fuse goes, it goes for a reason and that is generally the PTO is failing and shorting or drawing way too much current. The fuse is a safety valve. But it may get you through the cutting and you can call a mower repair shop and have them replace the PTO.

SOURCE: Starting my husky 2540 riding

Hi,
Check all of the wiring to the switch and the PTO clutch. You may have a wire that is either rubbing on the frame and shorting out or the two wires are rubbing together and shorting out...you have stated that you have checked the wires, but make sure to untape everything and check all parts of the wiring...

If all of the wiring looks to be in good shape and there are no scraps or scuffs, then the PTO Clutch is going bad and the magnetic clutch is either shorting or pulling too much current to engage it.... it will need to be replaced... not an easy project most of the time.

These clutches often do fail, and because of the heat of the engine and such they are usually very hard to remove. Make sure to have a good puller before you even think of trying to get it off of the shaft.

Bottom line is that it seems as though the problem is probably the electric clutch...

heatman101

SOURCE: On a Husqvarna 2005 ELS 2448 riding mower, PTO switch burns up, and wont blow the fuse first? Why?

I used to see this on the Kawaski engine machines with an electric clutch, they put a diode between the two clutch wires so as so as to stop any electrical feed back throught the clutch, when the machine is running without the clutch engaged it can turn into a generator.