Walbro Primer Bulb. Commonly used with WA, WT, WTK, WY, WYL Walbro carburetors.

• Replaces Walbro OEM# 188-12-1, 188-12, 188-15-1
• Replaces Stihl OEM# 4133-121-2700
• Replaces Husqvarna OEM# 503583701, 503597101, 531002436
• Replaces Echo OEM# 12318140630
• Fits carbs with metal plate cover (requires 4 screws)
• OD: 3/5"

Replacement Zama Primer Bulb, commonly used on C1M, C1Q, and C1U series carburetors

• Replaces Zama OEM# 0057004, 0057030, A01195A
• Replaces Stihl OEM# 4226-121-2700
• Replaces Husqvarna, Poulan OEM# 530035497
  
• Replaces Echo/Shindaiwa OEM# 12538108660
• Fits carbs with metal plate cover (requires 4 screws)
• OD: 13/16"
  

Walbro Primer Bulb commonly used on HDA & WYK series carburetors.

• Walbro OEM# 188-13-1, 188-13
• Fits carbs with the (2) screw hole plate that bolts directly to the carburetor
• OD: 15/16"

Walbro Snap In Primer Bulb. Most commonly used on Stihl, Husqvarna and Echo 2 cycle equipment.

• Walbro OEM # 188-512-1, 188-512
• Replaces Stihl OEM# 4130-350-6200
• Replaces Husqvarna/Redmax/AYP Products OEM# 503936601, 530047721
• Replaces Echo OEM# 12318110860, 12318139130, 3801081330
• Used on snap in style primer systems

Walbro Primer Base & Bulb commonly used on Poulan, Poulan Pro, Jonsered and McCulloch brands of 2cycle equipment.

• Walbro OEM# 188-513-1, 188-513
• Poulan/PoulanPro/Jonsered/McCulloch OEM# 530071835, 530047213
• (2) Mounting screw holes

Genuine OEM Zama External Snap In Primer Assembly. Used on lots of different brands of 2 cycle equipment, such as Stihl, Husqvarna, Echo etc. Even used on homeowner equipment like Homelite, Ryobi, Troybilt and other MTD products.

• Zama OEM## A056013, A056013A, A056013C1
• Replaces Echo OEM# 12318139130
• Replaces Redmax, Poulan and Husqvarna OEM# 530047721