do you have the model number so I can take a look at this ?
okay give me a minute.
how short does this seem ? these you have to roll onto the pully. they are tight. have you tried rolling it on ? what I mean by that is get it as far as possible on one side of the pulley and then turn the pulley and belt to roll it on.
I'm pulling up the tech sheets. be right back
is it possible you can put the blower side on first then roll the motor side on ? you can adjust this model back the belt has to be rolled on. make sure you not twisted more than a half of a twist between the motor shaft and the blower pulley.
well these are reversed so the motor turns in the oposite directoin from how this screws on so when it runnig its actually turn the same direction you put the pulley on so its like its tightening it. if you have another issue withthis comming loose get some loktight and put it on the threads, Its rare for these pulleys to come loose though.