I bought a Ferris z700 about 2 months ago. I put about 30 hours of use on it when the engine (Briggs and Stratton 27HP) started revving up and down. Evidently the carburetor needs to be adjusted, but it is not accessible by the user without voiding warranty. I have tried calling and emailing both Ferris and Briggs and Stratton with no success. They don't answer the phone. Service really seems to suck for this product.
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