There's online sources claiming they had 5, tail numbers 5816 to 5820. 5816, 5817 and 5818 are described as Y-8B, apparently purchased in 1994. 5819 and 5820 are described as Y-8F-200W, apparently purchased in March 2016.

There may have been a total of 4 earlier Y-8s.These are described as Y-8Ds and listed as tail numbers 5815 to 5818 MSNs have been quoted for these 4, although one of them is unconfirmed. As stated, there were 2 Y-8Fs delivered last year.

Black box from crashed Myanmar army plane retrieved
 

Full article: Black box from crashed Myanmar army plane retrieved | Reuters

Black Exhaust
 

I live in Myanmar and have seen this plane taking off from RGN on 3 occasions. It has always stood out because it is a absolute beast and leaves a heavy black exhaust trail as it ascends.

"Bad weather caused a military plane to crash in Myanmar last month with 122 people on board, state media say"

"Investigators found the pilot had lost control after entering thick storm cloud. Ice had formed on the wings and sudden crosswinds had led the engine to stall, state media say"

Myanmar plane: Bad weather blamed for Andaman Sea crash - BBC News

Slightly different but much more likely scenario. No mention of engines in the BBC article linked by previous poster.

What kind of wing/tail de-ice does the Y-8 have? Was it maintained?

As an extra question does it have a weather radar?

Yes, in the radome under the navigator compartment.