DIY - Replace Primer Bulb

• Pull the bulb assembly out from the tool's casing.
  
• Clean away any sawdust, grass, dirt, etcetera using a rag or compressed air. You don't want any foreign matter to get into the fuel lines.

• Disconnect the fuel lines from the nipples on the back of the primer assembly by gently pulling with Needle Nose Pliers. Here I've attached a paper Spring Clip to the first fuel line so that it doesn't pull back into the case.

The disconnected primer bulb assembly and clips on both fuel lines.

• Using the pliers, gently connect the fuel lines to the nipples on the back of the new bulb assembly.
  
• Carefully insert the new assembly into the hole.
  
• Pump the bulb to test.

If you forgot which line connects to which nipple:

- Cover one of the nipples with your thumb and press the bulb. The nipple that "blows" should connect to the fuel line to the carburetor (the one with the white line). The nipple that "sucks" should connect with the fuel line that goes to the fuel tank.
- Or, just connect the fuel line that has the white line to the longer nipple and you'll probably be correct.