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What dose code 48 mean on an Onan Microquiet 4000

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I assume it is a ky spec j-l. It is a field sense fault. The controller is not sensing the field voltage. Check for broken wires or replace controller.

Posted on Aug 12, 2009


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1 Answer

Onan 4000 won't turn over

check for bad battery, loose terminals ,dirty terminals , faulty starter relay
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Check the ignition circuit, and trigger coil for correct resistance on the trigger coil, and the ignition coil. The trigger coil is a small module on the engine shaft near the flywheel.

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Onan 4000 generator has no spark

If there is no spark, the ignition module may be bad, or the wiring to it. Have the module ohmed out. Also the magnetic trigger assembley that is on the rotor that sweeps past the ignition module maybe broken. If they check ok, suspect the control board

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By pbarker987 on Jun 02, 2010 " " I have an onan microquiet 4000 KY. It will not start, fault code on red light indicates (35) control card failure. Before I take it to authorized onan repair is their...

Because it wont start does not indicate a control board problem It will start but it will shut down within a few seconds if it was. enail me and i will try to help you with the problem

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Onan Microquiet 4000 starter will spin but not turn engine

bendix is actual the spring that pushes the gear back out of the ring gears engagement your issue is more likely a rusted /corrodied incline engagemnt gear a little lube will probably bring ti right back (do not us WD_40) this is not a lubricant it is an anti lubricant any light oil will do Good Luck

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3 Answers

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Remove the air cleaner and inside near the throat of the carb is two bolts holding the carb to the intake remove these. Unhook the fuel line and twist the carb to allow the linkages to remove.

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