What would be high hours?

[loveroftrees]

Hello, I am looking to buy a used bandit 150, it has the john deer 4045 d engine. This thing starts runs very smooth doesn't smoke like some diesels. All greaseable bearing have a good amount of grease around them. It doesn't have a winch and has the speed sensor. It does have 4000 hours. What kind of hours will this engine do if well maintaned? thanks for your help...