Sure it can and yes they do.
Unfortunately no. I have not experience that problem.
I’m sure there is but I don’t know how long
Without measuring the extended height is around 4 to 5 feet. the lowest is no less than 2 feet.
There are several different adjustments. My suggestion is to read the directions so you can adjust the flow.
It looks pretty standard. I have to imagine they use the same head across multiple products. Go to Melbourne.com and search for replacement parts for 9610.
dont think it comes with a warranty
it can oscillate back and forth or continuously 360
Yes, you can easily reduce both the distance and the width of the spray. One of mine is in a vegetable garden that is about 20’ x 20’.
A color instruction is at https://melnor.com/wp-content/uploads/2019/02/9610_instructions_00.pdf . Then go to youtube and search on Melnor pulsating sprinkler. There are several videos. Best one is https://www.youtube.com/watch?v=DIgw8UnxURo