just purchased a 1995 newmar kountry star. onan nh 6.5kw emerald plus generator cranks with the remote switch but die when you leave go on the switch. with rig connected to shore power, unit started and ran for about 20 seconds then switched from shore to generator and ran for about five minutes longer. unit has 212 hours on the meter. in short of taking back to onan and spending a small fortune, any one have an idea where to start looking. unit has sat since 98 with no useage.