diff --git a/src/extensions/scratch3_boost/index.js b/src/extensions/scratch3_boost/index.js
index b04e07827..d10535e70 100644
--- a/src/extensions/scratch3_boost/index.js
+++ b/src/extensions/scratch3_boost/index.js
@@ -365,16 +365,16 @@ class BoostMotor {
     }
 
     /**
-     * @param {int} value - this motor's new power level, in the range [0,100].
+     * @param {int} value - this motor's new power level, in the range [10,100].
      */
     set power (value) {
-        const p = Math.max(0, Math.min(value, 100));
-        // The Boost motors barely move at speed 1 - solution is to step up to 2.
-        if (p === 1) {
-            this._power = 2;
-        } else {
-            this._power = p;
-        }
+        /**
+         * Scale the motor power to a range between 10 and 100,
+         * to make sure the motors will run with something built onto them.
+         */
+        const p = MathUtil.scale(value, 0, 100, 10, 100);
+        
+        this._power = p;
     }
 
     /**
diff --git a/src/util/math-util.js b/src/util/math-util.js
index c5b5704e8..123d7714d 100644
--- a/src/util/math-util.js
+++ b/src/util/math-util.js
@@ -77,6 +77,20 @@ class MathUtil {
         const sorted = elts.slice(0).sort((a, b) => a - b);
         return elts.map(e => sorted.indexOf(e));
     }
+
+    /**
+     * Scales a number from one range to another.
+     * @param {number} i number to be scaled
+     * @param {number} iMin input range minimum
+     * @param {number} iMax input range maximum
+     * @param {number} oMin output range minimum
+     * @param {number} oMax output range maximum
+     * @return {number} scaled number
+     */
+    static scale (i, iMin, iMax, oMin, oMax) {
+        const p = (i - iMin) / (iMax - iMin);
+        return (p * (oMax - oMin)) + oMin;
+    }
 }
 
 module.exports = MathUtil;