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DaveWisc. View Drop Down
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Joined: 11 Oct 2009
Location: Wisc.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveWisc. Quote  Post ReplyReply Direct Link To This Post Topic: 720
    Posted: 17 Nov 2024 at 6:25pm
Locked up motor better to replace or fix Ohan
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Steve in NJ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 18 Nov 2024 at 2:46pm
Tough one to call Dave. Depends what locked up the engine. Lack of oil, or somethin' else? Onan's are expensive to rebuild period. A lot of folks moved to a repower like a B/S Vangard engine or Honda. Small Engine Warehouse is the place to purchase a repower. I think the B/S Vangard repower kit runs a little over 2K the last I looked... Find out what caused the Onan to lock up. The Onan in my 620 when I purchased it from the previous owner was knocking big time. Turned out one of the bolts that attach the starter motor adapter to the engine block backed out and the flywheel was hitting it!  Put locktite on the bolt, cranked it back in and we're good ta' go! No more knock! Stupid stuff happens. Check it out......
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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DaveWisc. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveWisc. Quote  Post ReplyReply Direct Link To This Post Posted: 18 Nov 2024 at 3:51pm
Well motor is lose so that’s good but no carb
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 29 Nov 2024 at 6:36am
Seems like Ive scene a Kholar 20 hp engine like out of a 1920 D/A in one 
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Steve in NJ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 02 Dec 2024 at 11:34am
Some of the guys were using a Kohler Carburetor in lieu of the OEM Onan Carb. Maybe Rob bie Jenkins will see this post and spread some light on that. He charged his 720 over to a Kohler carb. A couple small mods to do, but I believe they work well.....
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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