Hi Oli,
You might struggle to find one with a pull start now, seems they are all ES. The other issue is the fuel tank, the Chondas don't come with a fuel tank and fitting one can be a pain. On one Anniversary I did (13hp Chonda) I made up a fuel tank from a piece of 100x100 square tube and fitted it right up the front of the bonnet behind the grill with the filler cap through the bonnet.It just clears the front of the motor. Works well but was a bit of work. Another tip when changing motor on these things is if you haven't already done it is to tip the mower on its side so it is easier to see what you are doing. Just remember if you go to the bigger motors you will probably have issues fitting the bonnet
