Yes 0 deg is too late. I don't know what the correct number is for these machines but I do have some knowlege on other diesels. I'd guess that somewhere around 12-13 degress is more in the ball park. Although if your pump has the ability for some dynamic timing adjustment (advances with RPM) it may be a bit lower.
This is just for information, don't go setting your timing to my numbers, wait till you find the right number.