I would return it and try another Predator. I'd rather have a good Honda OHV clone than a flattie Briggs any day. We know from posts here and elsewhere that the Predator is decent engine, so there's got to be something wrong with yours. And a motor you can return locally is a let easier to deal than one you have to ship back if there is a problem. I might though send a buddy in to HF to buy the next one just in case the next one is no better - some stores don't like people who return the same item over and over. But see how they act when you return this one. HF usually is good about returns.