check to be sure the blades have free movement. usually if you have this problem it is caused from something stopping the blades from rotating therefore it stops the engine
If you are saying that the mower shuts off when you engage the blades (or put the lever for the blades in the up position) then the most common problem is a bad seat safety switch. This is located under the seat. It has two wires going to it.
Your belt could either be worn out and stretched, or the idler pulley bracket could have vibrated loose. I just tweaked the braket on mine, tightened it down and now I'm back to mowing. Hope this helps
You probably blew a belt.
One can purchase a Craftsman riding lawnmower from Sears, direct from Craftsman, or at the website of TractorByNet. One may also be able to purchase a Craftsman riding mower on eBay.
Clean/replace spark plug and air filter. If problem persists, open needle valve 1/8 of a turn for a slighlty richer mixture, Something else to check. Some riding mowers have a sensor switch that will not allow the blades to engage unless the clutch is depressed. The switch may be faulty. Not sure exactly where it is located, but since it is activated by the clutch pedal, I figure that is the place to start.
Sometimes the belt will slip off the pulleys and sit almost where they are supposed to be and look OK from a distance. If the belts are OK then check linkage to see if something has come off .If it is an electric clutch on it then check switches loose wires and the clutch. Hope this helps.
I'm not positive, but I think it is Craftsman.
which 42" Craftsman riding mower is made by Huskvarna
Most lawn tractors don't have any fancy clutch system, but simply use the belt to engage and disengage the blades. When the blades are disengaged, the drive belt is slack and there isn't enough friction to the pullel to drive the blades. When engaged, the belt is taught and the belt drives the blades. Tension is controlled by a spring loaded pulley. When you pull the lever to disengage the blades, you pull this pulley away from the belt. When you engage the blade, the spring pushed the pulley into the belt, tensioning it.
If the engine is running properly and the blades are not working there are a couple things that could be causing it. 1) The cable or linkage that operates the pulley to engage the blades is broken or bent. 2) One of the pulleys are bad. 3) The belt is broken. #3 would be the most common problem.
Beneath the flywheel.
What type of oil does a craftsman riding mower take