OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines rover supercut 20 with briggs quantum ic55 motor

hi to all this is my first post i have a problem that someone out there might have encounted i have a rover supercut (turbothrust) self propelled that doesnt move fast enough it seems to be chain driven. my question is can you adjust something to make it go faster or are they set at a governed speed .maybe a change of motor etc would help. any help would be greatly appreciated.cheers