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Onan Carb.


 
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Icuby
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Joined: 05 Mar 2009
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PostPosted: Sat Jan 26, 2013 12:43 pm    Post subject: Onan Carb. Reply to specific post Reply with quote

Got a Onan 'performer 24' in skid loader w/Nikki carb.Was loading up on gas bad. Installed many dollars{$100] in parts in carb. and now it wants to surge at all speeds except wide open. It does have good working power.There are no adjustments on this carb. Any ideas? Thanks
 
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S/C BOB
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PostPosted: Sat Jan 26, 2013 12:54 pm    Post subject: Re: Onan Carb. Reply to specific post Reply with quote

My 16hp did the same thing but the biggest thing I found was one of the adjusting screw hole was wore and it was getting too much air. I bought another carb on ebay and took the best of the two and built one. Runs smooth now. You may be getting too much air somewhere. Good luck
 
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boomers_influence
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PostPosted: Sat Jan 26, 2013 5:01 pm    Post subject: Re: Onan Carb. Reply to specific post Reply with quote

icuby
you may call on this if you wish.
651 437 2826
thank you. boomer ( the used onan engine parts guy )
 
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geoff gwisdala
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PostPosted: Sat Jan 26, 2013 5:40 pm    Post subject: Re: Onan Carb. Reply to specific post Reply with quote

Onan intake manifolds are 2 piece aluminum held together with rivets and RTV. My 318 John Deere was surging badly, I pulled the intake, JB welded it together and cured the problem. Onan carbs and intakes are really fussy about the amount of air so if any air leaks they will run poorly
 
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SuperABen
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PostPosted: Sat Jan 26, 2013 6:12 pm    Post subject: Re: Onan Carb. Reply to specific post Reply with quote

To check if you have an air leak, I usually get the engine running and take a little propane canister with the valve open around the carburetor. If the engine speeds up, you have an air leak somewhere.

Ben W. in VA
OldPathsEquipment.com
 
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JT Britt
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PostPosted: Sun Jan 27, 2013 6:45 pm    Post subject: Re: Onan Carb. Reply to specific post Reply with quote

Make sure this welch plug is not missing.If my memory serves me correct it would surge at all speeds if it were missing.

 
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