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byoung36

Onan no spark

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byoung36

I found a donor 520 that was suppose to have a good running engine when it was parked several years ago. I have been trying to start it to hear it run before I pull it, but it doesn’t have any spark. The spark plug with spark when I turn key on but nothing when turning over. 

Any help will be appreciated, these two are my first experience with Onan. 

Also the donor Onan has 800 hrs and 110psi compression on each cylinder. 

Does anyone know what the spec.compression should be?

 

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Edited by byoung36

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lynnmor

110 is good.  If you get one spark with one turn of the key, check connections on top of the coil, if that is OK, suspect ignition module behind flywheel.  The Onan engine manual gives instructions for testing ignition components.

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