What would cause the fuse to kill switch under the seat of mower to keep blowing by passing it does not work if the fuse is bad

Not normally. Most times they short out blowing the fuse.

It sounds like the engine running fine until engage the clutch. It more likely that you have a safety switch related problem like a bad seat switch or loose connector..

There probably several kill switched, on the PTO and another under the seat. For diagnostic purposes only the switches can be jumped with a wire to see which switch is bad. Once it is located remove it and replace it with a new one.

Disconnect it from the seat. Keep the plunger down with your fingers as if you're sitting on it with the seat, and start the machine. Let the plunger go and it the machine is running while in gear, the switch is bad. Also, you can use a multimeter to check continuity with the plunger up and down. That will tell you if it's working or not.

sounds like your electric clutch is prob bad check to make sure wires are not bare touching something, the clutches do go bad eventually like any other electrical part, disc the pigtail and try fuse, if it blows then I would consider a clutch

Hi,
There is a switch under your seat that senses if there is someone in the seat...that switch is bad and so it thinks that you are not in the seat and shuts down the motor...
find the switch, which will be underneath the seat and replace it....
Do not bypass it as it is a safety feature...

heatman101

Check the safety pressure switch under your seat. When you engage the PTO and get off the lawn mower, it will kill the engine. I had the same problem; drove me nuts. I thought it was the switch that is compressed when the PTO is engages. It wasn't. It was the safety under the seat. Bypassed and it worked fine. Ordered a new switch from a local repair shop. Good luck.

The heating element in the seat may be failing, even thogh it heats the seat, the element could be causing the circut to spike upon power shut down. Relay takes mili-second to shut down after ignition kill and power feed comes direct from battery. Check amp. draw at switch of bad seat and good seat upon shut down. If bad seat higher that 5 amp difference element n/g. Also check for bad relay as they can short internal and cause problems if primary power cut before switch shut down.

there is a safety switch somewhere toward the bottom of the engagement handle if this switch is bad it will kill the engine there is also a switch under the seat that could be bad

Good advice from bbenson6 (above), and check this: The mower has a seat switch that kills the mower if the operator gets off the seat with the blaqdes engaged. A bad seat switch would kill your mower every time.
Regared!! --W/D--

I always start by unplugging lights, kill wire to coil electric clutch if it has one ,sometime its the fuel shut off solenoid on the bottom of carb if it has one.
You can keep trying until you find the thing that does not blow a fuse or use an ohm meter to read from pos cable to ground of tractor unhook ground wire to battery you will read short to ground thru coil kill wire,starter solenoid small wire on spade,fuel shut off
solenoid ,electric clutch ,rectifier (charging system )and large wire to starter thats why I unplug them .
I have seen more shorts from lights , fuel shut off solenoid , charging system. not ing coil not safety switches not even bad starters.
good luck