Purchased this last week. Did normal start up things such as filling with gas and oil. Ran the generator for 15-20 minutes with no load. I hooked up several implements (leaf blower, heat gun) nothing that would overload the generator or the outlet. The leaf blower requires an extension cord while the heat gun is direct plug in. What happens is the generator produces power for 45 seconds roughly and then no power for 15 seconds, during the 15 seconds the data screen is scrambled. After the 15 seconds are over the power returns and then repeat. Any advice would be helpful. I really do not want to go through the headache of a return.