I am going to look at a JD 650 compact tractor with the 2 cyl yanmar engine this afternoon. The person selling says it needs an injector pump. He states it is available from Yanmar for around $250. I don't have much time to research this myself and if I want the tractor I will need to buy it today. Can any one help? Does any one know for sure if injector pumps are available and what the cost is?

Thanks Sam