I was recently gifted a heavy duty Montgomery Ward cement mixer with a 1/2 HP Marathon motor. I was also gifted a GE 5KC 1-1/2 HP "air compressor" motor. I was told the 1/2 HP motor presently on the mixer struggled to turn the drum and sometimes would stall out under even a light load. I'd like to replace the existing motor with the GE but am uncertain if there would be an "issue". Hopefully someone can look at the labels and offer an idea if this is a bad idea . . .