WHEN I LET OFF THE CLUTCH THE MOTOR CUTS OFF - Craftsman 20 hp 42 in. Deck Yard Tractor

Bad clutch/clutch problem.
Broken shaft from the clutch to the head.
Stripped gears in the head.

there is a safety clutch that you disengage when finishing the cut
it disengages the chain from the motor drive by a dog clutch
pull the safety bar back towards the trigger and the chain will cut
if you leave the finger on the trigger and the chain jams in the cut , you push the bar forward and the motor spins free
if that doesn't work take it in for a fix as that clutch is failed

Check the drive clutch spring and weights. there is probably something broke or wore out.

check clutch safty switch or seat safty got to be one of those switches

Most likely the seat switch is either bad and unplugged.

Is the belt slipping? If it's slipping you'll notice it, because it'll smoke pretty soon. If, as you watch it under varying load, it slows down with the blades then the belt is fine.

If it's not the belt then it's going to be the electric clutch that drives the belt. Get your voltmeter out and tap into the wires that go to the clutch, watch it as the mower runs. Anything under about 13V and the clutch may slip. If the voltage is good then the clutch is worn out. They don't cost too much, I'm pretty sure they're well under $100 still.

Make sure the wires that plug into the clutch are making a good connection. You want to check the voltage between the switch and clutch so that you're also checking the switch- if it's got a little crud in it, or a bad connection farther up the line, it can cause the clutch to slip, and you'll see this as the voltage dropping.

lp

Hey mate i had the exact same problem in my 95 Charade 1L. It is an electrical problem and nothing at all mechanical. My friend who is a mechanic wasnt really sure what it was but then found a cable under the dash that i think the clutch hit a limit switch or something and it tells the computer to shut down. He didnt know why and i cant think of anyreason either. Anyway, he pulled it right out of the circuit and threw it away and i havent had a problem since and the car runs exactly the same economy and performance wise it just doesnt stall any more. You wouldnt happen to know about the location of the o2 sensor in the one litre model would you?? Cheers, Zac.

Unplug the engagement clutch[it bolts to the motors crank] and try to engage again.If the fuse does'nt blow you need a clutch.If it does still blow you need a switch or you have a short in the harness.

If the motor is running another possible solution is you have a broken drive shaft spring PN-753-04280 To check this remove the screw which holds the **** pipe to the motor and loosen the clamp. The **** pipe should pull right off the motor exposing the end of the drive shaft spring. Pull the end of the spring, if it comes out it is broken.

I need help with this exact same problem. Someone please answer this question.