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Nikki Carb On An Onan P220


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#1 KennyP ONLINE  

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Posted March 07, 2014 - 10:19 AM

The carb on this engine has some issues. The idle mixture adjustment screw thread in the carb are nearly stripped. So I contacted member Littledeere to see if he had an extra carb I could purchase. Thankfully, he did. I also ordered a carb kit as I had no idea of the condition of this carb. I got the carb and kit earlier this week and yesterday I took the top off it. I was going to document installing the kit for a possible article here. But, it was in very good shape inside, only a little debris to be cleaned out. Here's some pics of it.

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As you can see it is very clean, so I feel I can go ahead and install it. I was also able to loosen the bolts on the old carb mounted on the engine, so I think I can do the R&R without removing the intake manifold. We'll see today.

Once the old carb is removed, I will look it over to see if I can salvage it. If so, I have a kit to put in it.


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#2 olcowhand OFFLINE  

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Posted March 07, 2014 - 10:51 AM

Sure isn't often you get a used carb that darned clean!  That is a huge plus!


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#3 JDBrian OFFLINE  

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Posted March 07, 2014 - 11:27 AM

That's a neat carb with the dual floats. I couldn't figure out what that picture was until I saw the carb body. Looks like it should run like new.


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#4 KennyP ONLINE  

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Posted March 07, 2014 - 12:16 PM

I got it swapped out already! Onan runs real sweet now! I couldn't believe how clean it was either. Changing it out was a challenge, but easier than removing the intake manifold as I would also have to take the exhaust pipes off it. I'll get into the other carb and see what went down with it.

Does anyone think it would be worthwhile to try to heli coil the idle mixture threads in the carb body?



#5 New.Canadian.DB.Owner OFFLINE  

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Posted March 07, 2014 - 04:48 PM

... Does anyone think it would be worthwhile to try to heli coil the idle mixture threads in the carb body?

I asked a similar question on another thread.  I think the common consensus was: it depends on how rare the carb is.  If they are a dime a dozen, then spending money on it doesn't make sense.  However, if it is rare, expensive, sentimental or cheap to fix, it is worthwhile.  Sometimes I fix commonly available items just so I know how when I have the same problem on a rare version.  Kinda like LBrush did when he chipped the pedestal in a carb.

 

http://gardentractor... carb jb weld



#6 KennyP ONLINE  

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Posted March 07, 2014 - 06:53 PM

A 'New' carb is $299, so fixing this one may well be worth the effort.

 

By the way, I used the tractor most of the day today. It performed flawlessly! We've been rearranging things here, so the 3-point boom pole is a big help!



#7 olcowhand OFFLINE  

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Posted March 07, 2014 - 06:57 PM

You know, if you or a buddy had a lathe, you could make a new slightly larger diameter mixture screw, then just tap the hole to fit. 


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#8 KennyP ONLINE  

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Posted March 07, 2014 - 07:10 PM

You know, if you or a buddy had a lathe, you could make a new slightly larger diameter mixture screw, then just tap the hole to fit. 

I have neither, Daniel! At least close by!






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