I have a challenge extreme 3.5hpetrol mower and I cannot get it to start. at first I thought that it was needing fuel but no. then I thought I might have flooded it so left it overnight and have just tried again and still not starting. help please! H
try removing the spark plug and checking for a spark ,or just replace spark plug ,,only around 3 quid.if that doesn't work let us know and we can go into it further .