I had two of the World Engines Maloney 125's, the secret to loving them was to replace the 1 pound magneto with a CH Ignition unit. Mine had the In Line Synchro-Spark unit. The Synchro unit was all in at 2,500 rpm. The second Maloney was a Davis diesel conversion. The gasoline Maloney turned a 15 x 8 Pro Zinger at 7,000 rpm the Davis Diesel conversion turned a 15 x 8 x 3 blade at 7,000 rpm