partszen Carburetor Kit for Husqvarna 51/55 Series — Complete Tune-Up with Ignition Coil & Filters

partszen complete replacement kit provides a compatible carburetor, ignition coil, air and fuel filters, gaskets and spark plug to restore Husqvarna 51 and 55 series chainsaw performance.

If your Husqvarna 51, 51EPA, 55, 55EU1 or related Rancher models are running rough, hard to start, or suffering fuel/ignition wear, this partszen aftermarket repair kit gathers the common service parts you need in one purchase. The kit includes a direct-fit carburetor built to match Walbro WT-170 family specs plus an ignition coil, filter elements, fuel line and hardware so you can replace the usual failure points without sourcing multiple components.

Which Husqvarna models does this kit work with?

The partszen kit targets Husqvarna handheld saws that use the listed part numbers. It’s engineered to be compatible with models sold under both the 51 and 55 family names, including EPA-designated variants and Rancher trims.

• Compatible model references: Husqvarna 51, 51EPA, 55, 55EU1, 55 Rancher, 55EPA.
• Matches OEM part numbers: carburetor 503281504 (Walbro WT-170 series equivalent).
• Includes ignition coil cross-references: 503620202, 503620203, 503901401, 544018401.

How does the carburetor and included ignition coil improve starting and idle?

Replacing a worn carburetor and coil restores correct fuel metering and spark timing, which typically reduces hard-starting and erratic idle behavior. The kit’s carburetor is patterned after the WT-170 family and comes with new gaskets and fuel filters to eliminate leaks and blockages that impede fuel flow.

• New carburetor for consistent fuel-air mixture and smoother idle.
• Ignition coil replacement to ensure reliable spark delivery and easier starting.
• Included gaskets and fuel filters prevent vacuum leaks and clogged lines.

What parts are included and why each matters?

This single purchase supplies the common wearable items technicians replace during routine tune-ups or repairs, allowing a full-service refresh without buying individual components. Each part addresses a typical failure mode for older or frequently used saws.

• 1x carburetor — primary fuel-metering component.
• 1x ignition coil — restores consistent spark for combustion.
• 2x gaskets and 2x fuel filters — prevent leaks and blockages.
• 1x air filter and 1x spark plug — improve air filtration and ignition stability.
• 1x 2-foot fuel line and 2x fuel plugs — replace cracked or hardened tubing and seals.

Can I install these parts myself or should I use a pro?

The kit is aimed at DIYers with basic small-engine experience and service tools, but some users may prefer a trained technician if they’re unfamiliar with carburetor adjustment or ignition gap settings. Installation requires careful steps to avoid fuel leaks and to set proper carburetor screws.

• DIY level: intermediate mechanical skills and a basic toolset recommended.
• Service tips: replace gaskets and fuel lines before testing; check spark plug gap and coil clearance.
• When to use a pro: if you can’t adjust idle/mixture or lack ignition-gap tools.

Who this is for: the partszen kit is designed for homeowners, arborists and small-landscape contractors who maintain Husqvarna 51/55 series chainsaws and want an all-in-one replacement pack to restore dependable starting, steady idle and predictable power. It’s also useful for shops that prefer stocking a single aftermarket kit to service multiple saws using the WT-170-style carburetor and matching ignition coil cross-references. If you need compatibility confirmation for a specific serial number, compare your machine’s part references to the ones listed before purchasing.