🍂Leaf Blower

SPARK PLUG FOULED

Husqvarna · 350BT 50.2 cc Gas Backpack Leaf Blower

Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower SPARK PLUG FOULED Error Fix: Spark Plug Fouled or Worn

The spark plug is carbon-fouled, wet-fouled from flooding, or has worn electrodes — remove and inspect the spark plug; a fouled plug will be black (carbon from rich running) or wet (fuel from flooding); clean with a wire brush and re-gap to specification or replace; the 350BT uses a Champion RCJ7Y or equivalent spark plug; replace annually or sooner if starting is difficult

Medium severity2 fixes available

Quick Answer

Error SPARK PLUG FOULED on the Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower means: Spark Plug Fouled or Worn. The top-ranked community fix is “Replace the Spark Plug with a Genuine Champion RCJ7Y” (medium difficulty, ~20 min, DIY cost: $10-$15). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · leaf blower

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many leaf blower repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $90-$130.

Other Husqvarna Models with Error SPARK PLUG FOULED

525LST 25.4 cc 17 in Gas String Trimmer

string_trimmer · 2 fixes

Other Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower Error Codes

AIR FILTER

Air Filter Clogged

2 fixes

CORD WON'T RETRACT

Starter Cord Will Not Retract

2 fixes

DIES AT IDLE

Engine Dies When Idling

Fuel System Leak

Backpack Harness Problem

Excessive Vibration

Impeller Fan Damaged

Low Blowing Power

People Also Ask About Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower Error SPARK PLUG FOULED

What does error code SPARK PLUG FOULED mean on a Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower?

Error code SPARK PLUG FOULED on the Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower means: Spark Plug Fouled or Worn. The spark plug is carbon-fouled, wet-fouled from flooding, or has worn electrodes — remove and inspect the spark plug; a fouled plug will be black (carbon from rich running) or wet (fuel from flooding); clean with a wire brush and re-gap to specification or replace; the 350BT uses a Champion RCJ7Y or equivalent spark plug; replace annually or sooner if starting is difficult

How do I fix error code SPARK PLUG FOULED on my Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower?

The most successful fix is "Replace the Spark Plug with a Genuine Champion RCJ7Y" (medium difficulty, ~20 minutes). Estimated DIY cost: $10-$15. HomeMD has 2 community-ranked fixes for this error.

Is error code SPARK PLUG FOULED on a Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower error SPARK PLUG FOULED myself?

Yes — the top-ranked community fix ("Replace the Spark Plug with a Genuine Champion RCJ7Y") is rated medium difficulty and takes about 20 minutes. Tools needed: Spark plug socket wrench, Spark plug gap tool.

How much does it cost to repair Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower error SPARK PLUG FOULED?

DIY cost: $10-$15. Professional repair typically costs $90-$130. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower have?

The Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower has 8 other known error codes, including: AIR FILTER (Air Filter Clogged), CORD WON'T RETRACT (Starter Cord Will Not Retract), DIES AT IDLE (Engine Dies When Idling), FUEL LEAK (Fuel System Leak), HARNESS ISSUE (Backpack Harness Problem), and 3 more.

Which other Husqvarna models have the SPARK PLUG FOULED error?

Error code SPARK PLUG FOULED also appears on 1 other Husqvarna model: 525LST 25.4 cc 17 in Gas String Trimmer. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower have?

The Husqvarna 350BT 50.2 cc Gas Backpack Leaf Blower has 8 other known error codes:

AIR FILTER — Air Filter Clogged (2 fixes)
CORD WON'T RETRACT — Starter Cord Will Not Retract (2 fixes)
DIES AT IDLE — Engine Dies When Idling (2 fixes)
FUEL LEAK — Fuel System Leak (2 fixes)
HARNESS ISSUE — Backpack Harness Problem (2 fixes)
HIGH VIBRATION — Excessive Vibration (2 fixes)
IMPELLER DAMAGE — Impeller Fan Damaged (2 fixes)
LOW POWER — Low Blowing Power (2 fixes)

Which other Husqvarna models have the SPARK PLUG FOULED error?

Error code SPARK PLUG FOULED also appears on 1 other Husqvarna model:

525LST 25.4 cc 17 in Gas String Trimmer (string trimmer) · 2 fixes

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