Question about Watts Onan Portable Generator - 4000 , Model# 5500

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RV Onan Emerald 1 Generator

I have a RV, 1987 Cruiz Air II with a Onan Emerald 1 Generator 4.0 KW on it. Generator will run with the rocker starter switch in start position. Shuts down when starter Switch is released.

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  • Louis lICALZI Aug 12, 2009

    I have resolved the Problem with my Onan Emerald 1,
    4 KW Generator. The problem was in the Generator Brush Block. It was the Brushes. I accessed the Brushes and cleaned them. Muchh wear was on them, but for now, I cleaned them. After cleaning them I put the Generator Brush Block back, and it started. I did a load test, and it worked just fine.
    I ordered new brushes and will service the Slip rings when I receive the brushes.

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Check all the ground wires and make sure their not broken or loose. If the wires are good next check the neg. Wire to the coil. Too check the swiitch make sure you have continuity too all the post when the switch in the on position, this requires removing the switch.

Posted on Mar 15, 2011

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Check AC output AVR most common suspect.

Posted on Aug 21, 2009

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The switch is bad -- needs replacing.

Charlie

Posted on Aug 29, 2009

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1 Answer

My RV has a Onan Emerald 5000 Genset Generator. I will start it and it will start after 3 times cranking it. Runs fine. Turn it off. Then try to start it again and I get nothing. No trying to crank.


associated problems here are
low oil sensor system faulty
fuel flow insufficient-- blocked fuel tap /filter in tap
problem wiring in the coil area--stop switch
problem ignition control module
take it to a generator repair shop/ mower repair shop for a proper diagnosis and quote

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More likely the switch is bad, and only make run contact when in the start position.
Easy to test the switch continuity with a ohm meter when it is not running.

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I have a 1997 onan emerald series GenSet 6500 I have been thru 4 starters it keeps breaking the drive gear assmbly WHAT CAN I DO PLEASE ITS ALREADY COST ME 400.00


Have you replaced the solinoid too? If not, maybe the solinoid is staying engaged, which keeps your starter, well starting. If the starter stays energised the flywheel WILL tear up the starter gear.


hope this helps

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

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Onan units have a breaker switch on them that has to be in the right position or you get no power. Can't tell you for sure where it is on the 4500 but on the 4000 RV series it is tucked in behind the on board start switch

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