WhichPartFits.com

Backpack Blower

Echo PB-770

2-Stroke

The Echo PB-770 is a 63.3cc 2-stroke backpack blower and the top model in Echo's commercial PB lineup, delivering maximum air volume and velocity for the most demanding large-area clearing operations. It runs a Zama carburetor and features Echo's professional harness with lumbar support for extended-shift wear. Under daily commercial production use, monthly fuel system inspection, air filter service after each shift in high-debris environments, and harness structural inspection are routine. Built for crews managing large parks, sports facilities, and commercial campuses where throughput and air velocity are primary concerns.

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-770 quick specs

Equipment
Backpack Blower · 2-Stroke
Covered Parts
Spark Plug, Air Filter, Fuel Filter, Carburetor, Primer Bulb, Fuel Line Kit
OEM References
15901019830, A226000410, A369000440, A021001870, 12318139130, 91204
Model Family
PB-770
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-770, 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 15901019830, A226000410, A369000440, A021001870 and match the removed part before choosing a listing.

Named part options

Cross-check named parts such as NGK BPM8Y (spark plug), Stens 605-373 (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-770 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-770? 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-770? 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.

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

Spark Plug

OEM15901019830
Dimensions
0.6mm gap
Variant notes
BPM8Y; same plug used across most Echo 2-stroke equipment

Air Filter

OEMA226000410

Fuel Filter

OEMA369000440
Variant notes
In-tank pickup filter

Carburetor

OEMA021001870
Variant notes
Walbro WYK-345/WYK-406; 63.3cc professional backpack blower; also superseded by A021003940

Primer Bulb

OEM12318139130

Fuel Line Kit

OEM91204
Variant notes
Echo fuel system kit; includes fuel pickup line and return line