[Shrewcub]

A1biofuel, whom I purchased it from, advertise it as 22 max HP. Carroll Stream sells the same one with their stickers on it and without a fuel tank and claim 20 HP. The specs from Winsun say 12 kW at 3600 rpm. That converts to 16.3 HP.

It produces 38 Nm of torque, which is about 28 ft/lbs, at 2600 rpm. I think it should do some work! Here is the spec page from A1 http://a1biofuel.net/Winsun-25hp-Specs.html