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Backpack Blower

Echo PB-500

2-Stroke

The Echo PB-500 is a 50.8cc 2-stroke backpack blower in Echo's commercial PB lineup, designed for production landscaping, large property management, and commercial leaf clearing. It delivers high air volume through a professional backpack chassis with padded shoulder and waist straps. The PB-500 runs a Zama carburetor. Under daily commercial use, monthly fuel system inspection (primer bulb, filter, lines) and air filter maintenance are routine. The PB-500 strikes a balance between blowing power and total unit weight for operators who run the blower for multiple hours per shift.

Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.

Echo PB-500 quick specs

Equipment
Backpack Blower · 2-Stroke
Covered Parts
Spark Plug, Air Filter, Fuel Filter, Carburetor, Primer Bulb, Fuel Line Kit
OEM References
A425000000, A226000032, 13120519831, A021001642, 12318140630, 90158Y
Model Family
PB-500
Data Confidence
Not yet independently reviewed

Quick Fitment

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Tune-Up Kit

Common service bundle: spark plug, air filter, fuel filter, carburetor, primer bulb, fuel line kit.

Maintenance Interval

Inspect filters and fuel lines each season, replace spark plugs during annual service, and service carb/fuel-system parts when starting or idle symptoms appear.

Before You Buy

  • Confirm the full model is Echo PB-500, not just the family name.
  • Check serial number, production date, and regional variant before ordering.
  • Match the old OEM number stamped on the removed part when available.
  • Compare dimensions, plug gap, thread, fuel line diameter, or chain pitch/gauge where applicable.

Common Mistakes

  • Ordering from a family listing without checking the exact sub-model.
  • Buying a kit that includes the headline part but wrong gaskets, lines, or bulb size.
  • Choosing the wrong carburetor revision when multiple versions were used.
  • Assuming all fuel line kits use the same diameter and routing.
  • Installing the correct plug number with the wrong gap.

Symptoms Map

Won't start

Spark plug, fuel filter, primer bulb, carburetor

Starts then dies

Fuel filter, fuel line kit, carburetor

Bogs under throttle

Air filter, carburetor, spark plug gap

Primer will not fill

Primer bulb, fuel line routing, in-tank filter

Replacement Options

Best OEM equivalent

Start with OEM references A425000000, A226000032, 13120519831, A021001642 and match the removed part before choosing a listing.

Named part options

Cross-check named parts such as NGK BPMR8Y (spark plug), Stens 605-329 (air filter), Stens 610-009 (fuel filter) against the OEM number, identity label, and dimensions.

Best for annual tune-up

Bundle spark plug, air filter, fuel filter when servicing the Echo PB-500 at the start of the season.

Best if replacing fuel system

Compare the fuel filter, carburetor, primer bulb, fuel line kit together so line routing, bulb size, filter style, and carburetor connections match.

Best budget kit

Use kit listings only when every included part matches this model page; cheap kits often mix correct headline parts with wrong bulbs, lines, or gaskets.

FAQ

Should I buy OEM or aftermarket parts for the Echo PB-500? Use OEM when the part controls fuel metering, ignition, or safety. Aftermarket kits can be useful for routine filters, bulbs, plugs, and tune-up bundles when the OEM number and dimensions match.

How do I avoid ordering the wrong carburetor for the PB-500? Match the carburetor number stamped on the removed unit, then compare linkage, choke setup, primer routing, gasket stack, and fuel-inlet direction.

What should I check before replacing fuel-system parts? Photograph the old fuel-line routing, match line diameter and filter style, and compare primer bulb size before buying a kit.

Related Repair Guides

NGK BPMR7A vs BPMR8Y: Heat Range and Electrode DifferencesNGK BPMR7A and BPMR8Y share a 14 mm thread and 9.5 mm reach. BPMR8Y is one step colder with a V-grooved projected electrode. See which equipment uses each.

As an Amazon Associate, WhichPartFits earns from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Spark Plug

OEMA425000000
Dimensions
0.6mm gap
Variant notes
BPMR8Y; same plug used across most Echo 2-stroke equipment

Air Filter

OEMA226000032

Fuel Filter

OEM13120519831
Variant notes
In-tank pickup filter

Carburetor

OEMA021001642
Variant notes
Walbro WLA-1; 50.8cc backpack blower; replaces A021001641

Primer Bulb

OEM12318140630

Fuel Line Kit

OEM90158Y
Variant notes
Includes fuel pickup line and return line