2021 RTV1100c Coolant leak

[2 KUBOTAS]

Wow, Not sure what going on with Kubota quality? 99 hours and unit looks like new until you look at the cooling system. Started to smell coolant and overflow was down some. Dropped the skid plates and was shocked to find that
there was coolant leaking for a bunch of different spots. The water pipes are both so corroded on each end that they need to be replaced. And the block drain plug is also leaking and its corroded. WTF The coolant looks good until I looked at it in the bucket. It has a foamy crud that you can scoop up with your hand. Inside of the hoses look coated with waxy crud. I really afraid what the rest of the system looks like.
I will of course flush the system a few times and wonder if a flush agent or cleaner should be used.
Anyone have any idea of why this looks so shitty already, Been around engines and diesels all my life and have never seen anything look this bad so soon.

 

[Doc]

That is horrible.
Have you owned it since it was new? Stored inside or out? Wondering if weather elements could have played a role in your issue?

 

[2 KUBOTAS]

No I'm second owner, It came from the upper part of lower Michigan and I think the owner had a block heater installed. I was wondering if maybe they used a inferior coolant or mixed two different kinds.
I have b21 tlbh and its a 2008 model that I bought second owner and it is just incredible. Very well engineered and well built. This unit is definitely different. --Two radiators? WTF, and just lots of coolant hoses and clamps that are hard to reach and tighten. Seems like they may have started building it and then made mods as they went. I will get it straightened out but I was really disappointed in the way it is put together. Some hardware is more rusted that a 20 year old truck. Lower nuts that hold the side mirrors on were really rusty. I replaced them with chrome lock nuts. Cable underneath rubbing on the drive shaft? Should have a better mount than a rod that it hooks over.
I guess I should be happy to have found this condition before it became worse. Had I not smelled coolant I would not have been looking to hard.

 

[2 KUBOTAS]

Well I did get this straightened out. But one thing that I was wrong about is the number of radiators.
There are a total of Three. and also a a/c condenser. One up front, one in front of the engine and one on the side behind the battery. Lots of hose clamps and things to start leaking.
I thought the engine block drain plug was leaking, and I did reseal that and low and behold it was the engine block heater that's right above it. Looks like it may have been a dealer installed item and the tech didn't clean the threads before installing it. I think I may have drained and flushed the system 4 times and then one more to drain and fix the block heater.
Oh well sure got familiar with this unit, Had all three skid plates removed and then changed oil and filter. Then also changed the two transmission filters. Though I would have lost more udt fluid but I hardly had to add any. ( Might have been a little over full before I started.)
Here I one more thing that maybe someone can comment on. The manual says that its should take 4.3 quarts of oil when changing. Well I added one gallon and its right up to the max full mark on the stick. Runs like a top after I got done with it, Hit 27 mph. YIKES!!
One other question, should the hand throttle stay at max rpm, mine will one stay at about 1500 rpm unless I hold it in the wide open position.