Where is the speed screw located ?
Driver shaft bearing ?
https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/poulan/tractors-ride-mowers/pp20va46-96042018800-2015-08/drive
Poulon Pro PP20VA46 with 54 hours run time on it.
Lately, it's down on speed and slow on take offs.
Is it perhaps time for a new drive belt already ?
TIA