Bill Ranson
Senior Member
I have a Onan genset, model MDKAU with 10 years experience but only 220 hours. I am the 4th owner of the boat and as far as I can tell the POs did a good job with maintenance.
The problem: genset runs 20-30 minutes then cuts off. When running it has robust water flow and doesn't have a problem under load.
When it shuts down I get a "service needed" code followed by a secondary problem code #58 which is the "high exhaust temperature" code.
What I have tried to fix problem: replaced exhaust line from engine to outside, removed seawater pump and serviced, replaced impeller, cleaned heat exchanger, replaced all gaskets, new thermostat and gasket, new inlet and outlet hoses, and replaced corroded wires and terminals on pressure switch.
Still having same problem. Suggestions??
The problem: genset runs 20-30 minutes then cuts off. When running it has robust water flow and doesn't have a problem under load.
When it shuts down I get a "service needed" code followed by a secondary problem code #58 which is the "high exhaust temperature" code.
What I have tried to fix problem: replaced exhaust line from engine to outside, removed seawater pump and serviced, replaced impeller, cleaned heat exchanger, replaced all gaskets, new thermostat and gasket, new inlet and outlet hoses, and replaced corroded wires and terminals on pressure switch.
Still having same problem. Suggestions??