Generator Issue. 1998 Kohler 4kW

Discussion in 'Electrical Stuff' started by Little Ducky, Jul 13, 2019 at 6:13 PM.

  1. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    In the 2 years I've owned this 1998 290 DA I've never really ran the generator for any length of time. Just enough time to do a Keurig coffee or use the microwave for a few minutes.

    So I went out for a brief swim and I decided to run the generator and keep the AC running.

    About 15 minutes later the generator stops. Can be restarted and then off again in 10-15 minutes. Coolant bottle full (not over heated) and water was flowing nicely out the exhaust. I'll check oil and feel around to make sure everything is snug when it cools off or tomorrow morning.

    I do have less than 1/2 tank of fuel on board if that makes any difference....so I was going to top off tomorrow as well and see if that changes anything.

    Wondering if the fuel pick up is higher in the tank than the engines?

    When the generator shuts down it just sounds like someone flipped the switch to off.

    I'll pull out the book and do some trouble shooting tomorrow.

    If anyone has any suggestions post them up.

    Thanks
     
    Last edited: Jul 14, 2019 at 12:07 AM
  2. Wanderer 290

    Wanderer 290 New Member

    27
    Jul 1, 2019
    01 sea ray 290 sundancer
    Twin 5.7 b3’s
    Sounds like either an overheat condition or possible circuit board failure.

    You can pull the cover on the pub and see if and led’s flash a code.

    Yes the fuel p/u for the generator is shallower than the engine fuel p/u’s.

    Also it rpm steady up until it shuts down? If rpm varies the voltage regulator will shut down the generator.

    But I really suspect an overheat condition which is due to air in the heat exchanger.
     
  3. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    I thought I had an eureka moment today with regards to my generator issue.

    Gave the generator a good once over checking oil, coolant and strainer to make sure those are good to go. Then I found a spring ("governor linkage" according to the manual) disconnected. Once reconnected the generator started like it never did before and found it's idle immediately.

    Ran for a few minutes and then I loaded it up by turning on the AC. It took a very quick dip and then hummed away putting out 120v without any "wha, wha, wha" like before. I though it was it...... yes ....... running better then ever.

    I celebrated briefly ..... about 10-15 minutes went by then........ brrrrrrrrrrrrrrrrrrump. It shut down like before. :(

    So I'm going to order up a new pump impeller this week and change it out. I didn't want to take the plate off to inspect w/o having one on hand.

    I'll update as needed.
     
  4. Wanderer 290

    Wanderer 290 New Member

    27
    Jul 1, 2019
    01 sea ray 290 sundancer
    Twin 5.7 b3’s
    On top of the heat exchanger there is a small plug for for bleeding the air out of coolant side of the cooling system. Remove that plug and check the coolant level inside the heat exchanger. The coolant level should be almost overflowing. If not add coolant through the plug hole, make take several small doses over a period of up to 5 minutes, until full and re-install plug.
    Let me know what what you find with the impeller. If the impeller is in bad shape there may also be pieces in the exchanger that need to be removed too.
     
    Little Ducky likes this.

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