I have 8 15HP sonny's blowers with inlets facing exit (motor facing entrance). They have been there for over 10 years, Yes I have replaced motors, but not every 6 months! I would say the average life was about 5 or 6 years some longer as I just replace 2. I believe 1 motor is original. I have a 120ft conveyor with decent drip space so maybe that makes a difference.
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