I have 76 Hallet Jet with a 455 Olds and Berkely Jet. I called over to champion marine in Canoga Park and got quoted $455 dollars for a tune up (not including parts e.i spark plugs, oil filter, oil etc) Im really new to all this and was wondering if anyone know of this place and if that is the going rate for service on Jet Boats. Any help and info would be greatly appreciated.