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In order to get an idea i need to ask a few questions. Has the push pull cable between the peddle and the bell crank been ajdusted? With the peddle at the top of its travel and the bell crank in detent is there adjustment possible on the push pull cable to raise the peddle?

Be careful to follow the order exactly. It takes to much to explain

Ok great. Now we move on to the good stuff. 1. Disconnect the throttle cable from the governor control lever..disconnect the control linkage from the hst speed control lever on the rear of the transmission. 2. Confirm that the bellcrank is centered in its detent. 3. Loosen and adjust the...

Well? If it were mine i would change the oil and filters just to rule out the easy stuff first. Check all of the suction lines and fittings for air leaks. Before you change the oil look at the oil in the hydro tank before you start the engine and after setting over night. Pull a sample with a...

Most common cause is cavitation. Either way an air leak in the suction or water would cause the oil to foam. Also out of spec oil. I assume you used kubota sudt oil and oem filter

Is the engine shuttering or the hydro? Is your hydro oil foaming? Could be build up of water in hydro oil. When was the last oil change in the transmission

Both dipsticks?

Low hydro oil

So? Your 5 year old service has 100 hours on it?

This only works if you follow the steps in exact order. When done you will have eliminated the common misadjusted control functions and then you can move from there with confidence.

Maybe use gorrila tape and tape the tach in position and read it with a mirror or something while you adjust the gov.

Try taking the seats out remove the tray and access the front of the engine from the service door under the tray

I repeat. You need 3600 to 3800 rpm with the max rpm adjustment on the throttle arm against the stop. And from there the real adjustments can begin. Get someone to hold the lever against the stop while you check the tach? Forget the peddle for now.

Great. Before i can start the other adjustment of the control relationship we need a positive confirmation of the high idle without the cable attached to the throttle. Once that 3600 to 3800 rpm is established without the control link connected we can proceed with the rest of the adjustments...

No problem. Take a real good look at the throttle control lever on the pump. Forget about the cable and peddle for now. Lets get you tu understand how the governor works without the linkages. On the lever you will see two screws..one sets on a stop at idle..this is the idle set screw and is...

That fits your symptoms. You don't need the transmission in gear for this. Raise the bed and lock it up find the fuel injection pump then with the engine off peg the throttle peddle to the stop. Then look at the throttle control lever on the injection pump and see if it is against the high...

Is it up to spec?

Yep. The one withbthe line uses a hydraulic piston to dampen the swash and the one without the line uses a spring and piston arrangement. I am unsure if the rotating valve assy inside is the same displacement or not I'm not sure but i doubt the displacement is the same. You could go to the...

Yep. The one withbthe line uses a hydraulic piston to dampen the swash and the one without the line uses a spring and piston arrangement. I am unsure if the rotating valve assy inside is the same displacement or not.

When you get your rpm confirmed there's just a few simple adjustments to the drive links.