Doesn't sound normal to me. I would definitely call the dealer and ask them about it. I have a 48 and can start my deck nearly at idle without stalling. Is the deck belt routed correctly and do the spindles turn easy?
Oxidation on bare aluminum castings happens quickly particularly in damp storage and climates.
The engine may have a governor/throttle cable problem or something else, or may just need some more run time.
What is the state of charge of the battery?
Does the fuel filter show any signs of water in it?
Fuel tank full?
From looking at your pics, there is no doubt that your machine was stored in a very damp environment, particularly seeing the starter motor which has a cadmium plated steel housing.
Many dealers don't have covered or closed storage areas for new machines, they leave them in the shipment condition and stack them up outside.
It is your decision as to how to approach this with the selling dealer, but for sure I would go there and talk with them.
Is your dealer close to the ocean?
Is there a possibility that they had flooding in their area recently?
Are able to get under the machine and look at the electric clutch to check it for rust and or corrosion?
was your machine a floor model? it may have sat outside in a few rain storms. but the corrosion is purely cosmetic. it wont harm the mower at all.
as for the pto issue, do you have the choke completely off? a fueling issue could cause the engine to stumble. and once again, was this machine a floor model? if it sat a while, it may just need fresh fuel.
From looking at your pics, there is no doubt that your machine was stored in a very damp environment, particularly seeing the starter motor which has a cadmium plated steel housing.
Many dealers don't have covered or closed storage areas for new machines, they leave them in the shipment condition and stack them up outside.
It is your decision as to how to approach this with the selling dealer, but for sure I would go there and talk with them.
Is your dealer close to the ocean?
Is there a possibility that they had flooding in their area recently?
Are able to get under the machine and look at the electric clutch to check it for rust and or corrosion?
There are other cadmium plated parts on the machine, are the oxidized also?
Part of the engine serial number is the manufacture date code. I'm not familiar with Kawasaki date codes, but this will tell you when the engine was manufactured which will give you an idea when the machine was assembled.
I would bring up the clutch engagement problem with the dealer initially and as the conversation progresses, bring up the oxidation problem on what is a new machine. I know what they will say as I have been on that side of the counter.
Your machine could be several model years old as some new models have Kohler 700 series engines on them.
I have a 2012 X-ONE that is stored in a shed with a dirt floor and the engine is cleaner than yours.
Just my thoughts!!!
In 2008 I passed on a machine that was new old stock and was a 2004 model. Although the price was OK, I wasn't OK with an engine that looked like yours and rust on some of the parts on the machine.
The bottom line is that the machine should operate as intended!!!