3K Carb Problem

[mcsniff]

Hi,

 

I rebuilt a carb for my ke30 3k and cannot get it running properly. It is a carb from an earlier model - no solenoid and less hoses.

 

I put a kit through it which replaced all the jets, valves, etc etc.

 

The problem I have is that it runs far too rich - fouls the spark plugs blows smoke and is down on power, particularly noticable when going up hills (basically doesn't go up hills anymore)

 

I have been over everything comparing to the original carb and manual, float level, jet sizes, plunger, linkages.

 

I have noticed the idle mixture screw doesn't seem to do anything.

 

Any help would be appreciated.

 

Thanks!

[altezzaclub]

I have noticed the idle mixture screw doesn't seem to do anything.

 

Part of running too rich- Sounds like the fuel level is too high, either float set too high or needle & seat valve leaking.

 

I'm not sure if you can get a measurement for it, but you could run the car, turn it off, disconnect the fuel line from the carb THEN undo the top and measure the height of the fuel. Then check the needle & seat carefully.

 

If the float is not adjustable, you can put a washer under the seat fitting to lower it, which will lower the fuel level by the thickness of the washer. That shouldn't be necessary if everything is working properly.

[mcsniff]

Thanks for the tips. I have taken the top off after running it and they fuel was about half way up the bowl, might be worth comparing it with my working one.

 

I have since read alot about float levels and found they are very important to get accurate (obviously). Maybe as you suggest I just have to be really accurate with my measurements, which vary slightly between the manual and instructions in the kit

 

Will let you know how I get on.

[mcsniff]

Still haven't got it going. Float level is dead on, fuel level is comparable to the working one. Used the top of my working carb (which looks the same) so its got a 'working' needle/seat, float etc.

 

The issue is it can't go up hills, loses power and basically 'just' makes it up the hill. When up the top of the hill it takes a few seconds to get power back and then its good again. Its down on power under normal driving too but can get around.

 

I had to use the throttle and choke linkage from my old carb, could this be causing the problem? Everything looks to open according to spec though. Its an auto if that makes a difference too.