USCG HP ratings for boats less than 20′ is/was… length * width * 2 – 90 + 5 = max hp. Based on that, the WX 1910 and MX 1825 are right in line with the results. Not saying I understand how USCG came up with that, but the math works out for Skeeters HP ratings for those rigs.

WX 1910 (19.08 * 7.96 – 90 + 5 = 218.75 max)
MX 1825 (18.33 * 8.08 – 90 + 5 = 211.21 max)