Help! engine I.D. on Onan

#1 03-12-2001, 01:27 AM

Can anyone identify an engine on an Onan generator? 9.5KVA 120/230 VAC 7.5KW MODEL 705JB-5DRV/96H . It is a two cylinder air cooled gasoline engine with overhead valves. I have never seen one like it before.

#2 03-16-2001, 08:46 AM

It may be one of the military standard engines from what I think was the Nam era. I've seen them with generators, but can't remember if they are OHV.

#3 03-22-2001, 11:12 PM

I have one and have the manual for it. I am under the impresion they were made by onan

I got a manual from ebay. Both manuals and JB generators show up there once in a while. My unit was made in 1968 It is a little odd in that it is 220 volt 50 hz (I converted it to 60 hz) I have seen them in civilian, and military There is also a diesel version that looks like the same block.

EnginAds LINK TO ONAN MANUALS

#4 03-01-2003, 08:46 PM

I have a operators, service, and parts manual for the JB series generators. It is a 7500 watt 120/240 volt 60 cycle 4 wire 3 phase generator

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Help! engine I.D. on Onan

Can anyone identify an engine on an Onan generator? 9.5KVA 120/230 VAC 7.5KW MODEL 705JB-5DRV/96H ....