Ended up buying a Merc 3.3 in good condition with Neutral and Forward gear position($350 aud) so should be relatively late model ie in the last 10 years, this motor was used as a backup on a 12ft Tinnie.
Reason why I did not go ahead with a Hangkai were:
The Pull rope was thin and would wear out quickly.
The Pull rope assembly was small compared to the merc and a piece could come loose quiet easily, but can be fixed.
Above has a get around in that the motor comes with a spare pull rope assembly (and tools)that you take with you and can easily change on the water.
Unit has a rubber prime button that can wear out similar to a petrol lawn mower ( not a deal breaker)
But the main concern is the Block, and the quality of. Have not come across anyone with a Chines outboard that has done a lot of hours.
2 local repair'ers said they would not touch Chines OB's, 2 others said they would repair if necessary but possibly more time involved because they did not know the motor.
If you have a Hangkai and have not see UTube Vids below they are interesting and informing.