I’m hoping these are related, recently when trying to start the gen the no AC power alarm goes off immediately. Sometimes it will start and run for awhile, other times start and suddenly die but the alarm still goes off. Fuel filters are new, replaced the oil pressure sensors,Fuel pump rebuilt 2 years ago.
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Thread: Onan MDL4 problems.
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01-13-2023 05:22 PM #1
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- Apr 2017
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Onan MDL4 problems.
'88 55'C hull 394 BEATs Therapy
12-71 TA's ZF BW190 1.5:1 gears
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01-22-2023 06:47 AM #2
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- Feb 2017
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- 65
Re: Onan MDL4 problems.
is the fuel shut off solenoid staying engaged? Coil could be going bad
1984 Hurley 36 Express sold
1974 46C series I sold
1984 46HP series II
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02-01-2023 11:27 AM #3
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- Apr 2017
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Re: Onan MDL4 problems.
I figured out the “shutting down” issue, pressure sensor was bad. The “no AC power” alarm persist, goes off as soon as attempting to start
'88 55'C hull 394 BEATs Therapy
12-71 TA's ZF BW190 1.5:1 gears
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02-01-2023 12:02 PM #4
- Join Date
- Jun 2012
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- 520
Re: Onan MDL4 problems.
Does it run long enough to display the AC voltage? Low voltage may be a resistor problem.
JMooney
61 MY 1983 #341
“Jerrie”
Miami , FL
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02-01-2023 05:54 PM #5
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- Apr 2017
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Re: Onan MDL4 problems.
The generator runs now, flawlessly from key largo to west palm yesterday with all “working” AC units running. Pressure switches are the only recent change, no idea why the alarm has started. It will silence and not come back on once running.
Originally Posted by jmooney
'88 55'C hull 394 BEATs Therapy
12-71 TA's ZF BW190 1.5:1 gears
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