Chainsaw Repair

Some pictures would be worth a thousand words on your part.

Pictures of the carb would help most as we could identify which outlets are what.

The impulse port on the carb goes directly to the outside of the pump diaphragm. On most carbs it is connected to a right angle barb in the cover of the carb. But on Walbro HD series carbs is in the side adjacent to the pump inlet barb.

The outlet to the primer comes from the metering valve or regulator side of the carb. This hole will suck air if left open and ther engine will not run. You primer bulb assembly has a check valve inside that prevents the sucking of eye.

It sounds to me that you have almost figured everything out and you just need a little reassurance?