Qsdgxi (2-Pack) Primer Bulb for Husqvarna 435/435E/440/440E/445/445E/450/450E Chainsaws – Replaces 188-512, 30047721, 503936601 | Compatible with Stihl, Poulan, Echo & More

Overview

The Qsdgxi 2-pack primer bulbs replace worn components to restore reliable starting performance for a wide range of chainsaws. These compact, durable parts are designed for quick priming, helping you get back to work with less downtime. The design emphasizes a snug fit and responsive priming action, so your first start feels smoother and more predictable in real-world use.

Designed for broad compatibility, the bulbs fit many carburetor configurations and feature a universal snap-in design that simplifies installation. With two bulbs in each pack, you have a ready replacement on hand for future maintenance or multi-machine setups.

Wide compatibility

The bulbs are mapped to fit a broad set of models and brands commonly used with Husqvarna, Poulan, Echo, Stihl, Craftsman and MTD small engines. This versatility means you can rely on a single replacement approach across several machines rather than juggling multiple part numbers.

• Replaces Part 188-512 and relates to 30047721 and 503936601
• Universal snap-in design for easy attachment to many carburetors
• Compatible with Husqvarna models including 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, 350EPA, 353, 435, 435E, 440E, 445, 445E, 450E, 455, 455E Rancher 460 chainsaw
• Also suitable for Poulan, Echo, Stihl, Craftsman and MTD small engines with compatible carburetors

Key benefits at a glance

• Two bulbs per pack for spare or dual-machine use
• Durable material engineered to withstand outdoor job sites
• Universal snap-in fit reduces installation time
• Broad model compatibility covers many common chainsaws
• Reliable priming support to aid starting routines

Real-world use cases

When a chainsaw sits idle or runs rough at first start, a fresh primer bulb can help restore confident cranking. The compact bulb is designed for standard carburetor housings, making a swap feasible in tight spaces during maintenance or repair tasks.

Whether you are tackling wood chopping, property upkeep, or seasonal maintenance, having a ready replacement helps minimize interruptions by improving the chance of a clean start on the first pull.

In the package

• 2 primer bulbs
• Simple replacement for compatible models
• No special tools required for installation