I remember when mechanics could actually rebuild or fix things instead of just replacing them. Too much fuel in should be adjusted with the float and needle adjustment. Id try a new mechanic.

 

I remember when mechanics could actually rebuild or fix things instead of just replacing them. Too much fuel in should be adjusted with the float and needle adjustment. Id try a new mechanic.

Quite agree with you.
It might be worth checking the breather valve (if fitted) or valve guides. Good luck Phil

 

If the dealer checked the oil and found gasoliene in it, then check the float level and the needle valve for dirt. You dont have to buy a new carborator. Hopefully it isnt the piston rings. what color is the smoke anyway?

 

I had the same problem with the 18hp, I too thought it was blow by, but nope, I needed a new motor. I went with the 20hp when I replaced it. But I was having the same problem as you and it turned out bad, so good luck bud.

 

Check on Ebay. I too have the same walker. There is a seller on there that has had several new Kohler command carbs. They are listed as being for a 18hp but have the same part number as the 20hp commands. I have purchased two of them, one for 64 dollars and one for 56 dollars. These are new never used. I replaced one on one of our Walkers and it runs perfectly. You should be able to swap carbs in 10 minutes max. The dealers price is ridiculous and a rebuild kit is about 50 dollars.

 

I had a 20 horse Kohler on a Walker, same exact problem with mine. The only problem is, at least its the same on my 25 horse Kohler Command on my Cougar, is that the carbs cannot be adjusted. If you are handy just buy a rebuild kit, they are a little pricey, around 50 or 60 bucks, and rebuild it yourself. Its fairly simple.

 

have seen this problem a couple of times and we ended up replacing the carb because the seat is not replaceable and putting a needle in it does not work you can barely adjust the kohler carbs these days.. and yea the price for that carb sounds about right its pretty crazy

 

If the dealer checked the oil and found gasoliene in it, then check the float level and the needle valve for dirt. You dont have to buy a new carborator. Hopefully it isnt the piston rings. what color is the smoke anyway?

The smoke was white, like I said it would throttle up and smoke then idle down and not smoke, Its as if the governor was going up and down.

 

I talked to a friend of mine that is pretty handy when it comes to motors. He said that I can get valve seating material from an auto parts store and put it on the needle and reseat it with the seat. Its a fine abrasive that when coating the needle you put it in the seat and turn it, which reseats it or matches the needle and seat for a tighter seal. I haven't had time to take apart the carb and check it out yet, plan on doing it soon. Thanks for all the help guys I'll let you know what it is.

 

how was the excess fuel getting into the crankcase?how is the fuel filter?is there a fuel pump on that model?some of the carbs have a rubber diaphram in them that goes bad,sounds like thats the problem if that engine has one.

 

I dont think its the carborator, posibly the oil ring might be damaged or the head gasket. take a look at he black tube that goes over the carborator opening and see if there is oil comming out there.

 

Hello have you ever herd of sucking a rag?? you simply remove the intake supply attachment and throttle the engine up and close the intake with a rag --just enough to bog the engine down a little bit --then quickly remove the rag let it regain rpm then do it again--this will SUCK and contaminants in the carbs needle and seat and the primary fuel supply right down the intake and wallah,all pau,done

 

I dont think its the carborator, posibly the oil ring might be damaged or the head gasket. take a look at he black tube that goes over the carborator opening and see if there is oil comming out there.

Okay, I found out a few things. The breather tube coming from the intake is blowing oil by into the carburetor. Do you think its the reed and needs replaced. I don't know if its getting too much fuel or not now. It seems that when it throttles up it blows oil, I pulled the hose out of the intake and it quit smoking, so it must be the oil blowing by.

 

Not sure if anyone else is still checking for this....I just had this same problem. Kohler 20HP would run great for about 5 minutes and then start smoking. Come to find out my fuel pump was down in the motor and was leaking....causing gas to dump into my oil. Replaced piston rings and fuel pump and it runs great! Fuel pump was converted to the outside of the motor....