[Fr. Frank]

Originally Posted by Bushwacker

I think the hull was originally rated for 170 hp and is much more efficient than most modern hulls, so it will plane at 10-12 mph and performs well with lightweight motors as small as 85-90 hp.

Actually, the original maximum HP rating on the outboard 20' was only 140 hp, until 1974 when it was raised to 175 hp.

The 20' hull was designed for single outboards of less than 300 lbs or twin outboards of less than 450 lbs total transom weight.

In 1969-71, they did make some of the 20' hulls to carry twins, but the1971 70 hp Evinrude/Johnson only weighed 202 lbs in the 20' shaft, and the '71 Merc 650 65hp was 217 lbs. These boats also had a larger fuel tank beneath the console, of (I think) 40 gallons capacity instead of the 27 gallon tank.