No, this Fan Motor will not fit the KR48 unit. You should be looking for manufacturer part number 501-148B. Here is a link to the exact part for the KR48 unit: https://www.etundra.com/restaurant-parts/electrical-parts/equipment-motors/fan/beverage-air-501-148b-115v-fan-motor/
Yes this Beverage Air 501-019B Fan Motor will fit your Beverage Air SP27.
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