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Discussion Forum

Onan Engine identification

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Samuel Andrews jr.

05-12-2002 17:23:46

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Could anyone tell me the horsepower and any other info about this Onan Twin engine? The model and serial numbers are as follows:
B48M-GA 018 3417A
J7833 87723
I would also be interested in a starter for the same engine. E-mail me at

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Steven Wood

05-16-2002 14:12:29

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 Re: Onan Engine identification in reply to Samuel Andrews jr., 05-12-2002 17:23:46  
I's off of a Gravely 818T, unless another company had them on their tractor.

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Rich Kirby

05-19-2002 05:27:15

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 Re: Re: Onan Engine identification in reply to Steven Wood, 05-16-2002 14:12:29  
That would be a 18 hp 48 cube b series onan,, Came off a sears SS or GT tractor??? I have the same motor in My 1979 GT-18. According to onan they don't make a replacement (performer series engine) for that application.But parts are still avalable for the for a hefty price, I need a carb, 380 for a new one!!!

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Steven Wood

06-28-2002 02:25:29

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 Re: Re: Re: Onan Engine identification in reply to Rich Kirby, 05-19-2002 05:27:15  
This is an original mount-I need a Starter?, flywheel, air ducting, and air filter for my onan B48

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05-14-2002 10:48:58

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 Re: Onan Engine identification in reply to Samuel Andrews jr., 05-12-2002 17:23:46  
You have an 18HP. I have an old 16HP but I believe the starters are the same. I have a rebuilt starter from an 16HP Onan. Let me know if your interested in the starter.

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05-12-2002 22:31:38

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 Re: Onan Engine identification in reply to Samuel Andrews jr., 05-12-2002 17:23:46  
This site has all the info on your engine. JIM

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