Hi I have bought a second hand Homelite ride on mower. 12.5/39 When the clutch is released it stops I am told its a sensor, is this so and if so where do I find it?

SOURCE: engine dies off once brake/clutch is released

Your answer was perfect, when I located the saftey switch it was not working properly.

Thanks a million, Ron

SOURCE: I have 16 hp Craftsman riding mower with a Kohler engine.

It may think you are in reverse and is killing the motor to keep you from backing up with the blade running. Look for switch that is telling it when you are in reverse, maybe it is stuck with grass or other debris. another possibility is that the blades are jammed and they are stalliing the motor. Mines stalls easily when cold.

SOURCE: snapper rear engine riding mower clutch

It is time to replace the driven wheel. When you flip the mower up on the back end (after closing the vent on the top of the fuel cap), the driven wheel is the disc that has rubber on the outer edge that rides on the silvery disc that comes off the end of the motor. The last time I bought one was about 7 years ago, at which time it cost me about $7.85. I would expect it to be around $11-12 these days.

SOURCE: engine stalls when clutch/brake pedal is released

Under the seat, there is a operator presence switch, if this switch fails, the mower will shut off when the brake is released, or put in any gear.

SOURCE: lawn tractor won't stay running if clutch is released.

There is an operator presence switch under the seat...it is more than likely faulty and must be replaced in order for the mower to run right.