[QUOTE=McGillicuddy;234111]Came across a Sceptre 20 with a classic 5.2 l Isuzu diesel w/borg-warner velvet drive. 190 hp, 387 ft/lbs torque, /QUOTE]
Turns out the above listed power was not true but rather was a 2.0L Isuzu C190 Pisces motor with the BW velvet drive. Roughly 62 hp and probably 100 ft lbs of torque.That explains the 13 knots.
I had to learn more because a 5.2 liter isuzu is close to 1000 lbs and I thought it was an odd conversion.