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Onan Generators Restoring, operating and maintaining vintage Onan generators. When asking new questions about your generator, ALWAYS give your model number AND serial number.

Onan Generators

OTC 5BH Genset

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Old 03-21-2005, 08:45:45 PM
John Hennig
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Default OTC 5BH Genset

Dad has one of these, believe it dates to around WW2. We are hoping someone
has some documentation/can point us to where we can find out more about it

It is in mostly full working order, has a non origional fuel tank and air filter other than that goes like a treat (excepting slightly sticky valve)

serial no is 34-156221, details are 230V, 50Hz, 3.2A 1.75KVa, 1500W

So um, yeah if anybody knows more about this particular unit I'd love to hear from you

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Old 03-22-2005, 08:43:34 PM
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Default Re: OTC 5BH Genset

John I have the manual for the OTC-44H will look at work and see if we have the manual on your unit.If I am correct your unit was built in 1944.The 50 hrtz tells me it was ordered by the British most likely.If you can give me the full model and serial number I can give you a better answer.
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Old 03-23-2005, 01:09:09 AM
John Hennig
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Default Re: OTC 5BH Genset


Thanks for the reply. Possibly was built for the Poms, but I believe the Aust Army used them as well. I am heading up to Dads farm today so I will look for
anymore ID info (although was I already wrote was all Dad couls see on the

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Old 03-23-2005, 08:56:51 AM
John Hennig
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Default Re: OTC 5BH Genset

quick update, had another look tonight, plate actually says 60Hz not 50
other than that name is D.W. Onan and Sons. The plate on the control box
has the date 1943. Apart from that there is no other serial nos etc

I will endeavour to post some pics shortly

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