I assume that you are physically moving the throttle shaft (rear)and no increase in rpms? One would think that if you moved the shaft, some change in runability would occur. You should be able to look through the carb venturi and see the throttle plate move and also look for the mounting gasket possibly being out of place./ Other than that, remove the bowl and check for fuel flow. Is it possible that the float valve is not resting in the slot in the float so the float isn't allowing the proper amount of fuel in?

Do you mean that it will only idle, and can't be sped up? If so, a link or spring must be broken/missing/unhooked.....ET.....

I removed the bowl and the float moves freely so I assume it is resting in the slot. There is fuel in the bowl, becuase when I remove the shut off solinoid fuel comes out.

Yes, it will only idle, not speed up or slow down. I drained the fuel and replaced with fresh and also once again moved the throttle lever on the "dash board" and looked at the levers. Moving the lever from slow to choke resulted in the the choke plate closing, but when I moved the throttle lever on the dash board from choke to fast, there was not a cooresponding movement in the linkage to move the throttle plate in carb. All springs and links are in place, but it seems to be hanging up on the carb.

I will remove the carb and try to adjust where the linkage is attached to the carb.

Thanks for your help.

Chuck G.

I ran into this. Customer had chosen to hook the throttle linkage into the other side of the throttle lever. The governer/speed control wanted to push the throttle lever arm to increase the speed but since the linkage was on the pull side of the arm, it pushed the throttle arm up against the idle stop.
I'm unsure if this makes sense but... anyway maybe it will help.

Peace

You installed the wrong fuel filter.
Get the correct one for that engine.

lbpod may be onto something.

IF this is a gravity fed carb and you used a filter for an engine with a fuel pump, it'll be too restrictive.

Thanks for everyone's responses.

It is a gravity fed carb. I bought a filter from Sears that says it fits my engine. It looks like the same one's I use on my VW Beetle. I also changed the oil again to make sure there was no fuel in the crankcase. I looked at the throttle cable and manually moved the throttle control on the dashboard and watched the throttle cable move. I thought that I may have put it in wrong after I cleaned the carb so I took it off and broke the throttle gromment. (darn). Still no change in the idle. I am ordering another gromment from Sears and seeing if I installed the throttle cable incorrect.

I will keep you posted.

Thanks again.

Chuck G.

Can you move the throttle shaft in the carb and change the speed to which the engine runs? If you can, that eliminates fuel flow issues. Did you perchance remove the governor arm that comes out of the block or the control plate when you took off your linkage?

I did not remove the governor arm or the control plate. I can move the throttle shaft and that does not change the engine speed. In fact when I manually move the throttle shaft to the slow position, it stalls.

Thanks,

Chuck.

What is the sprak plug type for the Kohler 15.5 engine? One or two?