Small Engines (Lawn Mowers, etc.): snapper riding mower, friction disc, rubber wheel

Question
Hi , I have an old snapper riding mower with  the rubber wheel that moves back & forth on the flat pulley & it changes the speed of the mower.  problem is the mower does not move at all. can u tell me what is inside that axel that may cause it to not move & is it hard to repair & cost ( might there be a pin that is sheard ) thank you Ray

Answer
That is called a friction disc.  If the disc isn't worn down and is not contaminated with oil/grease, then you may need to inspect the engagement linkage, etc. for misadjustment or something broken.  I don't know what axle you are referring to but there is a drive plate (driven off engine) that turns at a constant RPM.  Then the friction disc moves across this plate to regulate speed.  The friction disc is mounted on the driven shaft that is part of a drive assembly that moves the friction disc on and off the drive plate depending on whether the clutch is depressed or not.  This driven shaft, in turn, drives the main axle to transfer power to the tires.  There are numerous connection points and you will have to do thorough inspection of the assembly.  Hope this helps.