What causes a trimmer stalling?

A trimmer stalling can be caused by stall, idle, die, carburetor issues. We track 26 error codes across 5 brands related to this symptom.

How do I fix a trimmer stalling?

There are 51 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 Stalling

Trimmer runs at full throttle but dies when idling? Find fixes for carburetor adjustment, fuel filter, air leak, and exhaust issues.

Error Codes

Brands

DIY Fixes

89%

Avg Success

Craftsman

3 codes

All Craftsman codes

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

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

EGO

1 code

All EGO codes

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

Husqvarna

6 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

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

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

HEAD SPINS AT IDLE

Trimmer Head Spins at Idle

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

Replace Clutch Springs to Restore Proper Clutch Function

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

5 codes

All Ryobi codes

GUARD BROKEN

Line Cutter Guard Broken or Missing

🌿 Ryobi RY40260 40V Expand-It Cordless String Trimmer· 2 fixes· 85% success

Replace the Line Cutter Blade on the Guard

MOTOR STALL

Motor Bogs Down in Thick Vegetation

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

Test Motor and Controller; Replace Battery or Motor if Needed

TOOL OVERHEAT

Tool Thermal Shutdown — Motor Overheated

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

Inspect and Replace Motor Bearings or Controller Board

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 ALL BLINK

Battery Fault — All 4 LEDs Blinking

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

Replace Battery Pack After Internal Cell Failure Diagnosis

STIHL

11 codes

All STIHL codes

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

E10

Air Filter Blocked

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

Replace Air Filter

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

E16

Carburetor Needle Valve Stuck

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

Replace Carburetor Repair Kit

E12

Fuel Cap Vent Blocked

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

Replace Fuel Cap

E10

Muffler Clogging

🌿 FS 91 R Trimmer· 2 fixes· 90% success

Replace Muffler Assembly

E06

Air Filter Clogging

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

Replace Air Filter

DIES AT IDLE

Engine Dies When Idling

🌿 FS 91 R Trimmer· 1 fix· 72% success

Clean and adjust the carburetor

Related Symptoms

🌿Trimmer No Start 🔧Trimmer Line Stuck

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