Hi DJ and Lewy71,
Lawn Kings were basically all 2 Hp units as they were a budget Package Machine sold to a price while the "Fully fledged" Green Scott Bonnar's in the 17 inch cutting width were all 2.5 and 3 HP powered machines.
The only differences were the Pram Handle Bar opposed to the winged version and the colour being Pacific Blue in the model 45 variant, apart from that it's running parts are all identical to the SB green machine.
Cheers,
BB