Don,
Being the eternal optimist - I haven't really looked. The owners manual reads as if you send the defective part, assembly or entire unit to one of Northern Tools service centers after getting an RA from Northern Tool after calling their 800 service number. The gen is covered for 2 years. I've bought a bunch of things from NT and never had any problems with their offerings - so I kind of 'skipped' over that little detail. Buying local has its benefits but I rolled the dice and ordered on line anyway. I didn't buy the 'not included' starter battery for electric starter on the unit but with that said, the engine started on the first pull after I added the crankcase
oil and six gallons of gas. The gen set ran perfectly and almost constantly for the five days of no power in my area. I started it yesterday just to keep it exercised and again one pull lit it off.
Ron