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vette10r

Adjusting Carb

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vette10r

Hey I have a C-81 and put a different exhaust on it, the original one was completely shot and so loud I had to use ear plugs to use it. I purchased a muffler from TSC and it sounds much better now and I like the way it looks but its idling very high even with the idle all the way down. Which screws do I adjust to correct this? Thanks

 

 

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oldlineman

the small one in the center, it is horizontal

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WNYPCRepair
7 minutes ago, oldlineman said:

the small one in the center, it is horizontal

 

 

What are the other two for?

 

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oldlineman

not sure but one is high speed fuel adjustment and other is low speed fuel adjustment adjustment for fuel to air mixture

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vette10r

Ok so the dark grey/black screw is what I need to adjust and im assuming adjust it in to close off the air flow? Then leave both the gold screws alone?

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wallfish

Go in the manuals section and download a Kohler engine manual. It will cover how to adjust the carb. You should fix that link and adjust the governor too which is also covered in the manual

 

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lynnmor

Adjust the small black one till it idles rather slow.  Now adjust the one on the left till it idles at its best.  You may have to go back and forth a few times if the speed changes much.  Now set the correct idle speed.  Next, open the throttle quickly and see if it responds well, if not you may have to adjust the other one.  Always err on the rich side (counterclockwise) because way too lean can burn valves.

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vette10r
27 minutes ago, wallfish said:

Go in the manuals section and download a Kohler engine manual. It will cover how to adjust the carb. You should fix that link and adjust the governor too which is also covered in the manual

 

carbb.thumb.jpg.9a435de007e0502b48c89388

 

Thanks, yeah I got the tractor this way. I do need to order that and replace. Thanks for the nice diagram!

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WHX??

The small black screw is in way too far as told by the very compressed spring, Follow the advice above and you hopefully have it. Yes too lean will will result in higher head temps & valve issues.

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cleat
16 hours ago, vette10r said:

 

Thanks, yeah I got the tractor this way. I do need to order that and replace. Thanks for the nice diagram!

 

If this was my engine, I would get the correct link for it.

 

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vette10r
1 hour ago, cleat said:

 

If this was my engine, I would get the correct link for it.

 

Yes that's my plan, I do want to restore this tractor to as original as possible so I'll slowly chip away at parts as I find them. 

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