High quality Homelite Echo Sthil Ryobi Zama Primer Bulb Pouland primer bulb.
ZAMA 0057003 0057004 0058001, Homelite A01195A, Oregon 49-028, Echo # 12538108660
Fits: ZAMA C1Q, C1U, C1M carburetors
Selected Echo, Homelite, McCulloch, etc. blowers, brushcutters and chainsaw.
Bulb height: 0. 75”(19mm)
Bulb flange diameter: 0.85”(21.6mm)
Bulb diameter: 0.725”(18.5mm)
Here is a special tip that doesn’t require calipers; all you need is a penny, a nickel, and a dime. This primer bulb has two critical dimensions.
The diameter of the bulb, which should be the same as the diameter of the hole in the mounting plate that holds the primer bulb in place on your carb. For this bulb that diameter is 0.74″. An easy way to estimate this measurement is to use a penny, which has a diameter of 0.75″. A dime has a diameter of 0.705″. If you can’t fit a dime through the hole in the mounting plate, then this is the wrong primer bulb for you. In this case I stock a smaller primer bulb which will fit on your carb.
The diameter of the flange on the bulb. This is the part that sticks out like a fin all the way around the bottom. It gets smashed between the carb and the mounting plate to make a good seal and it prevents the bulb from falling off of your carb. For this bulb the diameter of the flange is 0.85″. To estimate this measurement, use a nickel which has a diameter of 0.835″.