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Onan engine for A.C. 720
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Dusty MI View Drop Down
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Joined: 13 Sep 2009
Location: Charlotte, Mi
Points: 5058 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dusty MI Quote  Post ReplyReply Direct Link To This Post Topic: Onan engine for A.C. 720
    Posted: 06 Jun 2017 at 11:31am
I've bought a 720 Allis that had been re powered, before I bought it, with a B & S engine.  The Onan engine came with it. I don't know anything about the Onan, or why it was replaced. I have a guy that wants it. We will check to see if it has compression.
What we would like to know is what would be a fair price to put on this Onan engine ?

Dusty
917 H, '48 G, '65 D-10 series III "Allis Express"
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10624 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2017 at 11:37am
Dusty really depends on condition. If salvageable, I would give 250 for it. HTH Tracy
No greater gift than healthy grandkids!
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ac720nut View Drop Down
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Joined: 09 Feb 2016
Location: Dexter Mi
Points: 1217 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ac720nut Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2017 at 1:56pm
Hope no one gets mad but,Tracy I'm amazed I've had one several times for $100 and not been able to sell, I have three that would gladly take $250 ea for them Just my $.02
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AC720Man View Drop Down
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Joined: 10 Oct 2016
Location: Shenandoah, Va
Points: 4910 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jun 2017 at 8:11pm
If it has good components, carb, ignition, flywheel, especially charging system, $250 is cheap for someone needing those parts. Try pricing them and you will know what I mean. I had to buy new charging system due to a small fire that melted the wiring and it was over $300 from Onan. Bad deck bearing caught grass clippings on fire that were laying on top of the deck. Shorted the wires and melted them all the way to the stator.
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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indiana2door View Drop Down
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Joined: 06 Mar 2010
Location: Indiana
Points: 41 		Post Options Post Options   Thanks (0) Thanks(0)   Quote indiana2door Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jul 2017 at 10:19pm
If it was mine I would rip out the B&S and re-build and re-install the Onan.
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DSeries4 View Drop Down
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7332 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2017 at 5:04pm
Originally posted by indiana2door indiana2door wrote:

If it was mine I would rip out the B&S and re-build and re-install the Onan.

Have you priced out rebuilding an Onan?  Mine was rebuilt before I bought it.  Previous over spent over $2000 rebuilding it, I got all the receipts with the tractor.
I am all for original too, except for these things!
'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Rod in MN View Drop Down
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Joined: 16 Sep 2009
Location: Rice MN
Points: 290 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rod in MN Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2017 at 1:44pm
The Onan Parts are not cheep. I try and Buy all the Onan engines I can for parts or for Replacement in other tractors. Around here there are hard to come buy.

About 15 Years ago I needed a Block pistons carb, intake I found on from a Guy that has a shed of them It cost 400.00 for a short block. He wanted the tin work and starter. He gets 400.00$ he had a new oil pan for the one I have He said that would be $900.00

He gave me a good deal

Rod in MN
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2017 at 11:25pm
I picked up 2 for my son out in Western MN - paid $200 each for them - one is suppose to be rebuilt - other is all there but questionable of why it was removed from AC tractor . He is planning on replacing engine in his small skid loader which will be a 3 Onan up for sale when he gets new engine for the loader 
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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rustydollar View Drop Down
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Joined: 07 Aug 2017
Location: Manitoba
Points: 456 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rustydollar Quote  Post ReplyReply Direct Link To This Post Posted: 07 Aug 2017 at 11:42am
Originally posted by indiana2door indiana2door wrote:

If it was mine I would rip out the B&S and re-build and re-install the Onan.


Agreed you can not beat a well seasoned cast iron engine block.
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