Glad to hear you got the pump working belkins456. After doing it the hard way the first time, you will sure appreciate the pump this go around : ) I don't think it will hurt the pump but I'm not an expert on that. You could always reduce the throttle a little if you're worried.
You will notice that the pump will draw the DB-100 out of the bucket allot slower than it did during your water test. The DB-100 is much thicker than water. I think it took about an hour for me to spray out 6 gallons of the DB-100. Make sure you got a full tank of gas and maybe some extra gas close by so you can keep it going. Remember to close the valve if the pump dies. It is a real pain if you get a pump full of DB-100. I always run my pump for 10 minutes or so after applying all the DB-100 to make sure it gets washed out. Good luck.
