What causes a trimmer no start?

A trimmer no start can be caused by start, spark, carburetor, fuel issues. We track 46 error codes across 5 brands related to this symptom.

How do I fix a trimmer no start?

There are 91 community-ranked fixes for this symptom across 5 brands. The average fix success rate is 89%. Find your specific error code below for step-by-step instructions.

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Trimmer No Start

Gas string trimmer won't start? Find fixes for spark plug, carburetor, fuel line, primer bulb, and ignition coil issues.

Error Codes

Brands

DIY Fixes

89%

Avg Success

Craftsman

4 codes

All Craftsman codes

MECH-DIES-THROTTLE

Engine Stalls at Full Throttle or When Cutting

🌿 WS210 17 in 25.4 cc 2-Cycle Gas String Trimmer· 2 fixes· 90% success

Rebuild Carburetor and Replace Fuel Lines

MECH-OVERHEATING

Engine Overheating — Loss of Power and Potential Seizure

🌿 WS210 17 in 25.4 cc 2-Cycle Gas String Trimmer· 2 fixes· 85% success

Clean Cooling Fins and Adjust Carburetor High-Speed Setting

MECH-PULL-CORD

Pull Cord Breaks or Will Not Retract

🌿 WS210 17 in 25.4 cc 2-Cycle Gas String Trimmer· 2 fixes· 90% success

Replace Recoil Spring and Inspect Engine for Seizure

MECH-WONT-START

Trimmer Engine Will Not Start

🌿 WS210 17 in 25.4 cc 2-Cycle Gas String Trimmer· 2 fixes· 90% success

Inspect and Replace Spark Plug and Clean Air Filter

EGO

4 codes

All EGO codes

TOOL-CUTS-OUT

Tool Intermittently Loses Power

🌿 ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed· 2 fixes· 85% success

Test and Replace Battery or Repair Overload Protection Circuit

TOOL-NO-START

Tool Will Not Start

🌿 ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed· 2 fixes· 90% success

Test and Replace the Trigger Switch Assembly

BAT-1-FLASH

Battery Single LED Flashing

🌿 ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed· 2 fixes· 90% success

Test Battery Cells and Replace Battery if Necessary

BAT-LEDS-OFF

Battery LEDs Not Lighting Up

🌿 ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed· 2 fixes· 90% success

Test and Replace Battery Management System (BMS) Board

Husqvarna

10 codes

All Husqvarna codes

FUEL LEAK

Fuel System Leak

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Replace Carburetor Gaskets and Inspect Carburetor for Leaks

EXHAUST CLOGGED

Exhaust Port or Muffler Blocked

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Remove Carbon Buildup from Exhaust Port and Replace Spark Arrestor Screen

SPARK PLUG FOULED

Spark Plug Fouled or Worn

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 85% success

Replace Ignition System Components for Persistent Spark Plug Fouling

AIR FILTER

Air Filter Clogged

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Replace the Air Filter with Genuine Husqvarna Part

RUNS ROUGH

Engine Runs Rough or Surges

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Rebuild Carburetor and Inspect Crankcase Seals

OVERHEATING

Engine Overheating

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 85% success

Inspect and Replace Fuel Components and Check Exhaust Blockage

CORD WON'T RETRACT

Pull Cord Will Not Retract

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Replace the Recoil Starter Assembly

THROTTLE STUCK

Throttle Cable Sticking

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Replace Throttle Cable Assembly and Inspect Return Spring

DIES AT IDLE

Engine Dies at Idle

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 85% success

Clean or Replace Fuel Filter and Inspect Fuel System

WON'T START

Engine Will Not Start

🌿 525LST 25.4 cc 17 in Gas String Trimmer· 2 fixes· 90% success

Clean or Replace Fuel Filter and Service Carburetor

Ryobi

2 codes

All Ryobi codes

TOOL OVERLOAD

Tool Overload Protection — Motor Overcurrent

🌿 Ryobi RY40260 40V Expand-It Cordless String Trimmer· 2 fixes· 90% success

Test and Replace the Motor Controller Board

BATT DEPLETED

Battery Fully Depleted — No LEDs Lit

🌿 Ryobi RY40260 40V Expand-It Cordless String Trimmer· 2 fixes· 90% success

Replace Battery Pack Due to Deep Discharge Damage

STIHL

26 codes

All STIHL codes

E19

Firmware Corruption Detected

🌿 FSA 57 Battery Trimmer· 2 fixes· 95% success

Replace Control Board

E18

Capacitor Failed

🌿 FSA 57 Battery Trimmer· 2 fixes· 95% success

Professional Motor Circuit Repair

E09

Trigger Switch Fault

🌿 FSA 57 Battery Trimmer· 2 fixes· 90% success

Replace Trigger Switch Assembly

E06

Charging Circuit Failure

🌿 FSA 57 Battery Trimmer· 2 fixes· 85% success

Replace Internal Charging Circuit Board

E05

Control Board Failure

🌿 FSA 57 Battery Trimmer· 2 fixes· 95% success

Replace Control Board

E19

Starter Rope Broken

🌿 FS 56 RC-E Trimmer· 2 fixes· 95% success

Replace Starter Rope

E18

Fuel Tap Valve Stuck

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Fuel Tap Valve

E16

Fuel Tank Cap Vent Blocked

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Fuel Tank Cap

E14

Primer Bulb Leak

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Primer Bulb

E12

Fuel Line Cracked or Leaking

🌿 FS 56 RC-E Trimmer· 2 fixes· 95% success

Inspect and Replace Fuel Lines

E07

Starter Rope Jammed

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Starter Assembly

E05

Spark Plug Fouling

🌿 FS 56 RC-E Trimmer· 2 fixes· 95% success

Replace Spark Plug

E04

Fuel Filter Clogged

🌿 FS 56 RC-E Trimmer· 2 fixes· 95% success

Replace Fuel Filter

E03

Carburetor Malfunction

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Carburetor Assembly

E02

Ignition Coil Failure

🌿 FS 56 RC-E Trimmer· 2 fixes· 90% success

Replace Ignition Coil

E19

Excessive Exhaust Smoke

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Check and Correct Fuel Mixture

E17

Worn Starter Pulley

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Starter Pulley

E16

Carburetor Needle Valve Stuck

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Carburetor Repair Kit

E13

Ignition Module Fault

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Ignition Module

E12

Fuel Cap Vent Blocked

🌿 FS 91 R Trimmer· 2 fixes· 95% success

Replace Fuel Cap

E09

Starter Rope Jam

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Starter Rope and Pulley

E08

Fuel Line Crack or Leak

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Fuel Line

E07

Spark Plug Fouling

🌿 FS 91 R Trimmer· 2 fixes· 95% success

Replace Spark Plug

E03

Ignition Coil Failure

🌿 FS 91 R Trimmer· 2 fixes· 85% success

Replace Ignition Coil

E02

Fuel Mixture Imbalance

🌿 FS 91 R Trimmer· 2 fixes· 95% success

Drain and Refill with Correct Fuel Mix

DIES AT IDLE

Engine Dies When Idling

🌿 FS 91 R Trimmer· 1 fix· 72% success

Clean and adjust the carburetor

Related Symptoms

🔧Trimmer Line Stuck 🔧Trimmer Stalling

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