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#1
04-25-2021, 07:49 AM
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What should an Onan sound like?
I fell into a John Deere 318 with a B43G that the PO said was non running. I didn’t ask too many questions because it was in good shape and clean and really cheap. So I bought it and brought it home. The battery was from 2011 and swollen. So I put a good battery in it, put some gas in it and turned the key. I saw fuel go through the filter and it fired right up. It sounds pretty good but it sounds like a Diesel engine almost. Is that how they sound? I’ve never heard one running and it sounds different from my Kohler M20 in my Cub Cadet. It’s not a knocking sound or anything like that. The oil is good and clean. It has 1900 hours on it. The tractor had a good clean deck and everything. I feel like a thief!
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1912 with Kohler M18 engine repower, CI rear, 50C deck, 364 snow blower IH Cub Original with deck #2 cart GREEN 314 with integral sleeve hitch, H2 and independent brake upgrade from a 317, and front hydraulic blade, 48" deck 
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#2
04-25-2021, 08:17 AM
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Well, the few experiences that I have had with Onan, they similar but different than the Kohler Twins. Maybe a good thorough Tune Up is in store.
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[B]Roland Bedell[/B] CC Models: 100, 105, 1450, 782, (2) 784, & 2072 [SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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#3
04-25-2021, 08:29 AM
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It sounds strong, throttle up and down is responsive. It doesn’t smoke. Inside the air filter is clean and not oily. I’m going to look at the plugs and change the oil and stuff before I try to use it. I also have to change the rear tires, I have a good spare set but one of the rears has a plug in it that isn’t holding and they’re worn down. The hole looks pretty big and there may be two plugs in it and it leaks down a day after pumping it up. Oh, and it had JD wheel weights mounted on it also.
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1912 with Kohler M18 engine repower, CI rear, 50C deck, 364 snow blower IH Cub Original with deck #2 cart GREEN 314 with integral sleeve hitch, H2 and independent brake upgrade from a 317, and front hydraulic blade, 48" deck
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#4
04-25-2021, 10:13 AM
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Most of my experience with Onans have been in generators, but they do have a " different " sound than most gas engines. Here is a video of one running. Fast forward to 4 minutes ;
https://www.youtube.com/watch?v=Sq4WJE4x1SU
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#5
04-26-2021, 07:35 AM
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Sort of hard to compare a video to real life but mine sounds like that I think. Maybe I’ll record a video of it running and compare that way...
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1912 with Kohler M18 engine repower, CI rear, 50C deck, 364 snow blower IH Cub Original with deck #2 cart GREEN 314 with integral sleeve hitch, H2 and independent brake upgrade from a 317, and front hydraulic blade, 48" deck
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#6
04-26-2021, 07:38 AM
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They have a bit of a more throaty sound esp under load.... 1900hrs is pretty good as i have normally repowered the JD 318/420 with other Kohlers at the 1500 mark for the Onans… Check the compression on both banks to get an idea of the internals....
Also the split intake manifold has been known to be a PITA....
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