The HRB476C is not a ride-on it is a power driven roller mower.
Let the clutch is slowly and if the engine falters ease off on the clutch and try again slowly. The engine also needs to be thotoughly warmed up.
My clutch has packed up completely and I am about to send it to a repairer unless someone can tell me how to access the bottom end of the cable which is very slack.
eric millward, April 2007