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WON'T START

John Deere · JS26 Self-Propelled Mower 190cc 21 in.

John Deere JS26 Self-Propelled Mower 190cc 21 in. WON'T START Error Fix: Engine Won't Start

Engine does not start after multiple pulls. Causes: stale fuel (most common — especially after winter), clogged carburetor (varnish from ethanol fuel), fouled spark plug, primer bulb cracked or not working, flywheel brake cable too tight, fuel shutoff valve closed.

High severity2 fixes available

Quick Answer

Error WON'T START on the John Deere JS26 Self-Propelled Mower 190cc 21 in. means: Engine Won't Start. The top-ranked community fix is “Clean Carburetor and Inspect Primer Bulb and Flywheel Brake Cable” (hard difficulty, ~60 min, DIY cost: $20-$40). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · push mower

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 push mower repairs can be done safely at home, consider hiring a qualified technician if:

This is a high severity error — continued use may cause damage or a safety hazard
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: $150-$250.

Other John Deere Models with Error WON'T START

JS46 Walk-Behind Mower 21 in.

push_mower · 2 fixes

Other John Deere JS26 Self-Propelled Mower 190cc 21 in. Error Codes

BLADE WON'T STOP

Blade Won't Stop When Released

2 fixes

DECK CLOG

Grass Clumping Under Deck

2 fixes

DIES UNDER LOAD

Engine Stalls When Cutting

2 fixes

ENGINE SURGES

Engine Surges or Hunts

Excessive Oil Smoke

Fuel Leaking

Starter Cord Hard to Pull

2 fixes

HIGH VIBRATION

Excessive Vibration

2 fixes

People Also Ask About John Deere JS26 Self-Propelled Mower 190cc 21 in. Error WON'T START

What does error code WON'T START mean on a John Deere JS26 Self-Propelled Mower 190cc 21 in.?

Error code WON'T START on the John Deere JS26 Self-Propelled Mower 190cc 21 in. means: Engine Won't Start. Engine does not start after multiple pulls. Causes: stale fuel (most common — especially after winter), clogged carburetor (varnish from ethanol fuel), fouled spark plug, primer bulb cracked or not working, flywheel brake cable too tight, fuel shutoff valve closed.

How do I fix error code WON'T START on my John Deere JS26 Self-Propelled Mower 190cc 21 in.?

The most successful fix is "Clean Carburetor and Inspect Primer Bulb and Flywheel Brake Cable" (hard difficulty, ~60 minutes). Estimated DIY cost: $20-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code WON'T START on a John Deere JS26 Self-Propelled Mower 190cc 21 in. serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix John Deere JS26 Self-Propelled Mower 190cc 21 in. error WON'T START myself?

Yes — the top-ranked community fix ("Clean Carburetor and Inspect Primer Bulb and Flywheel Brake Cable") is rated hard difficulty and takes about 60 minutes. Tools needed: Socket wrench set, Carburetor cleaner spray, Compressed air, Screwdrivers, Pliers.

How much does it cost to repair John Deere JS26 Self-Propelled Mower 190cc 21 in. error WON'T START?

DIY cost: $20-$40. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the John Deere JS26 Self-Propelled Mower 190cc 21 in. have?

The John Deere JS26 Self-Propelled Mower 190cc 21 in. has 8 other known error codes, including: BLADE WON'T STOP (Blade Won't Stop When Released), DECK CLOG (Grass Clumping Under Deck), DIES UNDER LOAD (Engine Stalls When Cutting), ENGINE SURGES (Engine Surges or Hunts), EXCESSIVE SMOKE (Excessive Oil Smoke), and 3 more.

Which other John Deere models have the WON'T START error?

Error code WON'T START also appears on 1 other John Deere model: JS46 Walk-Behind Mower 21 in.. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the John Deere JS26 Self-Propelled Mower 190cc 21 in. have?

The John Deere JS26 Self-Propelled Mower 190cc 21 in. has 8 other known error codes:

BLADE WON'T STOP — Blade Won't Stop When Released (2 fixes)
DECK CLOG — Grass Clumping Under Deck (2 fixes)
DIES UNDER LOAD — Engine Stalls When Cutting (2 fixes)
ENGINE SURGES — Engine Surges or Hunts (2 fixes)
EXCESSIVE SMOKE — Excessive Oil Smoke (2 fixes)
FUEL LEAK — Fuel Leaking (2 fixes)
HARD TO PULL — Starter Cord Hard to Pull (2 fixes)
HIGH VIBRATION — Excessive Vibration (2 fixes)

Which other John Deere models have the WON'T START error?

Error code WON'T START also appears on 1 other John Deere model:

JS46 Walk-Behind Mower 21 in. (push mower) · 2 fixes

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