HI I am working on a Honda GXV 530 in a Massey lawn tractor. The engine will turn over fine sometimes, in fact most of the time, will fire up and run fine but occasionally when trying to start cold, the engine comes to a dead stop. If you turn the engine past the compression stroke it will probably start. The customer installed a new battery, starter, I have pulled the valve covers, the decompression seems to be fine(exhaust valve opens slightly on compression stroke both cyl) when turning the engine over by hand, checked the valve lash. I am not really familiar with this Honda engine. Any suggestions would greatly be appreciated.