Fan Belt noise?

Either one or more of your belts is worn and probably loose and you will need a shop to replace one or more to eliminate the noise also they can check your power steering pump alternator etc at the same time. You can get a estimate for belt replacement here https://repairpal.com/estimator/mercury/capri and locate a shop near you here https://repairpal.com/mercury-repair-in-las-vegas-nevada

could be your aftermarket belt doesnt quite have the same groves as the original....it'll wear down or just get one from Napa