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Carb Adjustment
Topic Started: Feb 11 2008, 12:28 AM (1,032 Views)

What is the best way to adjust the carb on a 149 with a K321 14hp engine? I just put on the proper carb on my engine and can't seem to get it adjusted properly. The manual says to initially adjust the high speed screw out 2 turns and the idle screw out 1 1/4 turn.
That adjustment does not make it run good at all. It seems to like the high speed screw out around 3 to 4 turns to get the high speed to sound right and the idle screw out around 2 1/2 turns. These settings seem to run good at high and low speeds but anything in between seems to hunt a bit. I left the governor where it was set before with the Walbro carb. This carb was just rebuilt and it is the Kohler one with the 30 in the throat. If I turn the idle screw in more it is not smooth at idle and it really won't idle slow enough. At these settings the throttle response is great and in my opinion, the maximum engine speed seems higher than I like at full throttle.
Keep in mind that the engine does not have a load on it currently when I am adjusting it.
Even when the engine is hot it likes the choke pulled out for a second or two to let it start.
Any advise would be appreciated.

Mark :ih: :roflmao:
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How's it goin' GERKS 149??? :)

I have a chart here that says the Kohler Adjustable Jet Carburetor adjustments for the K321 are 2-1/2 turns for Low Idle and 3-1/4 High Idle. So basically you have it right just the way you have it set. I hope this helps. Good Luck. :)
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Mark sounds like you have it. One thing to check is your throtal shaft bushing. I had one worn out on the 106 and had a freind repace it and she runs like a dream now. On the overspeed. I reset the gov on one of my 14s and it runs alot better now. Alot of people say dont mess with it but I had to it was overspeeding going down a slight grade and then you had to run it wide open to get back up. It took me longer to read the manual a few times than it did to reset it. There is something in there that wears and you have to reset it. someone will say what it is. Out of all the cubs I own I think the 149 is my favorite by far. Lots of power and a hydro lift great combo.

Heres mine last summer when I finaly got it running. Note to self, you can do a big wheelie with the front off! :eek:
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Thanks guys for the help with my carb adjustments. I am glad to hear that these adjustments are in line with where they should be. I'm sure when I get it out under a load the 149 will run a lot better.
The only question I still have is that when you restart it after it is warm you still have to pull the choke out for a second or two to get it to fire. Is that normal?

Mark :BigThink
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How's it goin' GERKS 149???? :)

Actually it's pretty normal with this type of carburetor. I pretty much have the same type of carb that you're running, the only difference is that it's for a 7hp engine. And even after it's been running for about 3 hours of mowing I still have to pull the choke to restart it and there are times that I don't. Now keep in mind that I'm always tearing apart my carburetor and dipping it in chem-dip after I get through doing any mowing contract job that I have to make sure that I always have a clean carburetor and that it's ready for the next job. But I would go ahead and check and see if there is'nt anything wrong in the fuel lines or your carburetor could simply need a good cleaning in some chem-dip. But then of course this is just my opinion. I'm pretty sure someone else will have a different opinion on this as well. I hope this helps in some way. Good Luck.
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