All,

There is some missing information in this thread because there were some private emails exchanged between myself and Alessandro.

I am sure that there are a few of you that would like to see that exchange, so I have pasted it here:

FROM ALESSANDRO TO BEBE:
Thank so much...I 'd try a new (fuel) pump BUT when Onan stopped no flashing code appears...
This is a strange thing!


FROM BEBE TO ALESSANDRO:
One more thing I thought of for a shutdown without a code:

Try this:
Go to the fuel injection pump and you should see a little lever that gets pulled by a small solenoid. That solenoid may be going bad. See if the solenoid is pulling or dropping out when the engine starts, then shut down.

This solenoid has two coils. One is 12VDC for starting and the other is 4VDC which holds the solenoid after starting. The 4 volt coil may be going bad. When you hold the start button down, the alarms are bypassed and the 12VDC coil on the solenoid is energized. When you release the start button, the 4VDC coil on the solenoid is energized and keeps the solenoid closed.

Try holding the lever with your hand, or mechanically keeping it in a "run position" by tying or wiring it in position. If the Onan continues to run, you need to replace this solenoid. I believe that if this solenoid fails you will receive no code.

Additionally, regarding the impeller blades:
If you did not get a shutdown code, the impeller was probably not the source of your shutdown because if your shutdown was due to overheating or lack of water flow, you would see a flashing code.

The best way that I have found to simply remove all of the impeller blades from the Onan Heat Exchanger is to close the main sea chest valve and open the end caps on both ends of the Heat Exchanger...while using a wet/dry shop vacuum (shop-vac) to suck the excess water and the blade parts which will end up in the vacuum. If you turn on the shop-vac as you loosen the end caps, you will capture all of the water and have zero water clean-up.

This would also be a great time to change the zinc on the Heat Exchanger.

Unfortunately, if you do not have a wet/dry shop-vac, you will need to remove the Heat Exchanger to get all of the pieces out. Removing the Exchanger is problematic with all of its connections, so buy or borrow a shopvac. Also, the end caps and end cap gaskets are delicate and may get damaged in this process. It is a good idea to keep end cap spares on-board.

Hope this solves your problem...let me know.

Bill
BeBe, SM2k, #387