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.
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
- Last Reviewed
- 2026-05-20
- Data Confidence
- Aftermarket-confirmed
- Sources Consulted
- OEM part references, Aftermarket catalog cross-references, Retailer fitment listings
Quick Fitment
| Part Type | OEM / Spec | Common Option | Confidence |
|---|---|---|---|
| Spark Plug | 15901019830 | NGK BPM8Y | Medium · 2026-05-20 |
| Air Filter | A226000410 | Stens 605-373 | Medium · 2026-05-20 |
| Fuel Filter | A369000440 | Stens 610-009 | Medium · 2026-05-20 |
| Carburetor | A021001870 | Walbro WYK-406 | Medium · 2026-05-20 |
| Primer Bulb | 12318139130 | Hipa 12318139130 | Medium · 2026-05-20 |
| Fuel Line Kit | 91204 | Hipa 91204 | Medium · 2026-05-20 |
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.
Common aftermarket option
Cross-check aftermarket listings such as NGK BPM8Y (spark plug), Stens 605-373 (air filter), Stens 610-009 (fuel filter) against the OEM number 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
Does this fit other Echo models? Use this page for the exact Echo PB-770 unless a manual, dealer listing, or removed part confirms another model.
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.
Spark Plug
- Reviewed
- 2026-05-20
- Dimensions
- 0.6mm gap
- Variant notes
- BPM8Y; same plug used across most Echo 2-stroke equipment
| Brand | Part # | |
|---|---|---|
| NGK | BPM8Y | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |
Air Filter
- Reviewed
- 2026-05-20
| Brand | Part # | |
|---|---|---|
| Stens | 605-373 | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |
Fuel Filter
- Reviewed
- 2026-05-20
- Variant notes
- In-tank pickup filter
| Brand | Part # | |
|---|---|---|
| Stens | 610-009 | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |
Carburetor
- Reviewed
- 2026-05-20
- Variant notes
- Walbro WYK-345/WYK-406; 63.3cc professional backpack blower; also superseded by A021003940
| Brand | Part # | |
|---|---|---|
| Walbro | WYK-406 | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |
Primer Bulb
- Reviewed
- 2026-05-20
| Brand | Part # | |
|---|---|---|
| Hipa | 12318139130 | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |
Fuel Line Kit
- Reviewed
- 2026-05-20
- Variant notes
- Echo fuel system kit; includes fuel pickup line and return line
| Brand | Part # | |
|---|---|---|
| Hipa | 91204 | Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying. |