CFWMXG 503936601 Snap-In Primer Bulb Replacement for Husqvarna 455 Rancher, Craftsman & MTD

Overview

The CFWMXG 503936601 primer bulb is designed as a straightforward replacement for worn or damaged snap-in bulbs on a wide range of small engines. With a snap-in design, installation is quick and tool-light, helping maintain consistent fuel delivery and reliable starting behavior in the field. This bulb is a direct replacement for part numbers such as 188-512 and is compatible with brands including Husqvarna, Poulan, and Craftsman, among others. Always confirm your engine model and part number before purchasing to ensure the best fit.

Compatibility and fit

The bulb covers a broad list of Husqvarna and Poulan models and is intended for use in small engines found on chainsaws, trimmers, and blowers. Examples include:

• Husqvarna 125B, 125BX, 125BVX, 225BX, 225HBV, 356BF, 356BT
• 235, 235E, 236, 236E, 240, 240E, 123L
• 225, 232L, 227L, 227LD, 227R, 227RD, 240L
• 322C, 322L, 322R, 323, 325, 325LX, 325LXT, 325RX
• 325RXT, 325RDX, 325RJX, 325CX, 326, 326C, 326L, 326LX
• 334T, 338XPT, 340, 340E, 345, 346XP, 350

It also aligns with universal or cross-brand references such as Walbro 188-512 and Husqvarna 503936601 or Poulan 530047721, making it a versatile option for many small-engine needs.

Notable features and benefits

• Universal snap-in design for simple installation on compatible carbs
• Direct compatibility with multiple replacement part numbers and brands
• Cross-reference with Walbro, Husqvarna, Poulan, Echo, Ryobi, and more
• Durable construction designed to resist fuel and environmental exposure
• Works with trimmers, blowers, and chainsaws that use standard primer bulbs

Practical use and maintenance tips

When your engine is hard to start or experiences inconsistent idle, a fresh primer bulb can help restore predictable starting behavior. This CFWMXG bulb is suitable for routine maintenance or field repairs, whether you’re in a garage, shed, or on a job site. To ensure a secure seal and proper function, inspect the bulb for cracks or deformation and verify the snap-in fit before running the engine.

Installation and care

To install, remove the old bulb, align the new snap-in bulb with the carburetor fitting, and press until you hear a click. Check the surrounding hose connections for fuel leaks after the first start. If fuel leaks are detected, re-seat the bulb or replace the adjacent seals as needed.