I purchased a craftsman self propelled mower model 37711. It is
> advertised as a EZ walk variable speed mower but I noticed when using
> it that it didn't seem to vary in speed. I looked under the drive
> cover and found a single pulley with a idler pulley arm which would
> engage the belt when pulled by the control cable. This to me looks
> like a single speed system, either the belt is engaged and you move
> forward or you release the cable and disengage, am I missing something
> or was this false advertising. Thanks.
If it is like my Lawnboy, you basically let the clutch (belt) slip to vary speed. Would be a stupid thing if it were a car but works OK on my Lawnboy. Frank