I have a JD 4300. I turned up the fuel on it and it definately helped. These newer tractors are turned down so far from the factory that even under max load they produce little if any smoke. My rule of thumb for tractors is that when reved up from idle under no load they should send out a light haze. Then under load they will smoke about right. The max fuel screw is located on the back side of the fuel pump under the shutoff solenoid. It has a round cover with safety seal wire. You need to loosen the lock nut and turn the entire threaded shaft. I think you turn it infor more smoke.

On the topic of turbos, JD now has the turbos on the small engines like ours from the factory. Therefore you could purchase this from JD and install it on your tractort. Be aware though that the turbocharged models have a larger oil pan with much greater capacity (6-8qts).

Hope this helps
Randy

 

I have mine set so it that when pulling pretty good it is putting out a dark haze. I dont like it to lay a black cloud.

It really shouldn't produce smoke at full throttle when warm if no laod is present.

From what you wrote I would say you have it turned up to far. It only takes a turn or so to get the result you are looking for. There is a point of diminishing returns where you are just waisting fuel and carboning up the engine. A light haze is about right.