I just put in a new starter and battery. It will start quickly and run for about 1.5 minutes very smooth. Then it will back fire a couple times and shut off. When I looked into the motor the starter was smoking hot. Any ideas what would cause this? After it cools down it starts right back up for another 1.5 minutes and shuts back off.

Hi,
Sounds as if you have two problems. Something is hanging with the starter to make it get hot. Either the switch or solenoid. There is a module that controls engine operation and safety functions of the machine that is possibly failing. It is pricey as are most Honda parts
Your manual is here:
http://www.hondapowerequipment.com/pdf/manuals/31763901.pdf
And a parts manual for the engine is here:
http://cssportal.css-club.net/honda/pp-service/data/13Z1E402.pdf
Peace,
CLarke

Thanks, I'll look into these.