[Lubrecon]

Pully diameter determines the rotational speed of the water pump impeller, smaller pully, faster rotational speed, bigger(diameter)slower speed. Unless the belt is somehow reversed around the pully, it has to be rotating in the right direction, forget that idea, it would have to be really messed up.

Make sure the pully diameter is right.

1900 CFM sounds good. But is the voltage right to get that volume. Check out what the other guys said about voltage at the fan.

Jerry