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ENGINE SURGES

John Deere · S240 Sport Lawn Tractor 21.5 HP 42 in.

John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. ENGINE SURGES Error Fix: Engine Surges or Hunts

Engine RPM fluctuates up and down rhythmically (hunting/surging). Causes: dirty carburetor (most common), governor linkage binding or misadjusted, fuel cap vent clogged (creates vacuum in tank), partially clogged fuel filter, air leak in intake gasket.

Medium severity2 fixes available

Quick Answer

Error ENGINE SURGES on the John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. means: Engine Surges or Hunts. The top-ranked community fix is “Inspect and Adjust Governor Linkage and Clean Carburetor” (medium difficulty, ~90 min, DIY cost: $10-$20). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · riding 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 riding mower 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: $120-$180.

Other John Deere Models with Error ENGINE SURGES

E130 Lawn Tractor 22 HP 42 in.

riding_mower · 2 fixes

JS26 Self-Propelled Mower 190cc 21 in.

push_mower · 2 fixes

JS46 Walk-Behind Mower 21 in.

push_mower · 2 fixes

S100 Lawn Tractor 17.5 HP 42 in.

riding_mower · 2 fixes

S130 Lawn Tractor 22 HP 42 in.

riding_mower · 2 fixes

X350 Select Series Lawn Tractor 18.5 HP 42 in.

riding_mower · 2 fixes

X570 Multi-Terrain Tractor 24 HP 48 in.

riding_mower · 2 fixes

Z345M Zero-Turn Mower 22 HP 42 in.

riding_mower · 2 fixes

Z355R Zero-Turn Mower 22 HP 48 in.

riding_mower · 2 fixes

Z530M ZTrak Zero-Turn Mower 24 HP 54 in.

riding_mower · 2 fixes

Other John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. Error Codes

BATTERY DEAD

Battery Won't Hold Charge

2 fixes

BELT SQUEAL

Deck Belt Squealing or Slipping

2 fixes

BLADES WON'T ENGAGE

Blades Won't Engage (PTO)

2 fixes

CRANKS NO START

Engine Cranks but Won't Start

2 fixes

DECK VIBRATION

Excessive Deck Vibration

2 fixes

DIES UNDER LOAD

Engine Dies When Mowing

2 fixes

ELECTRICAL SHORT

Blown Fuse or Electrical Problem

2 fixes

EXCESSIVE SMOKE

Engine Smoking Excessively

2 fixes

People Also Ask About John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. Error ENGINE SURGES

What does error code ENGINE SURGES mean on a John Deere S240 Sport Lawn Tractor 21.5 HP 42 in.?

Error code ENGINE SURGES on the John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. means: Engine Surges or Hunts. Engine RPM fluctuates up and down rhythmically (hunting/surging). Causes: dirty carburetor (most common), governor linkage binding or misadjusted, fuel cap vent clogged (creates vacuum in tank), partially clogged fuel filter, air leak in intake gasket.

How do I fix error code ENGINE SURGES on my John Deere S240 Sport Lawn Tractor 21.5 HP 42 in.?

The most successful fix is "Inspect and Adjust Governor Linkage and Clean Carburetor" (medium difficulty, ~90 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code ENGINE SURGES on a John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. 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 John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. error ENGINE SURGES myself?

Yes — the top-ranked community fix ("Inspect and Adjust Governor Linkage and Clean Carburetor") is rated medium difficulty and takes about 90 minutes. Tools needed: T30 Torx screwdriver, Carburetor cleaner spray, Small wrench set, Pliers.

How much does it cost to repair John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. error ENGINE SURGES?

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. have?

The John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. has 8 other known error codes, including: BATTERY DEAD (Battery Won't Hold Charge), BELT SQUEAL (Deck Belt Squealing or Slipping), BLADES WON'T ENGAGE (Blades Won't Engage (PTO)), CRANKS NO START (Engine Cranks but Won't Start), DECK VIBRATION (Excessive Deck Vibration), and 3 more.

Which other John Deere models have the ENGINE SURGES error?

Error code ENGINE SURGES also appears on 10 other John Deere models: E130 Lawn Tractor 22 HP 42 in., JS26 Self-Propelled Mower 190cc 21 in., JS46 Walk-Behind Mower 21 in., S100 Lawn Tractor 17.5 HP 42 in., S130 Lawn Tractor 22 HP 42 in., X350 Select Series Lawn Tractor 18.5 HP 42 in., and 4 more. 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 S240 Sport Lawn Tractor 21.5 HP 42 in. have?

The John Deere S240 Sport Lawn Tractor 21.5 HP 42 in. has 8 other known error codes:

BATTERY DEAD — Battery Won't Hold Charge (2 fixes)
BELT SQUEAL — Deck Belt Squealing or Slipping (2 fixes)
BLADES WON'T ENGAGE — Blades Won't Engage (PTO) (2 fixes)
CRANKS NO START — Engine Cranks but Won't Start (2 fixes)
DECK VIBRATION — Excessive Deck Vibration (2 fixes)
DIES UNDER LOAD — Engine Dies When Mowing (2 fixes)
ELECTRICAL SHORT — Blown Fuse or Electrical Problem (2 fixes)
EXCESSIVE SMOKE — Engine Smoking Excessively (2 fixes)

Which other John Deere models have the ENGINE SURGES error?

Error code ENGINE SURGES also appears on 10 other John Deere models:

E130 Lawn Tractor 22 HP 42 in. (riding mower) · 2 fixes
JS26 Self-Propelled Mower 190cc 21 in. (push mower) · 2 fixes
JS46 Walk-Behind Mower 21 in. (push mower) · 2 fixes
S100 Lawn Tractor 17.5 HP 42 in. (riding mower) · 2 fixes
S130 Lawn Tractor 22 HP 42 in. (riding mower) · 2 fixes
X350 Select Series Lawn Tractor 18.5 HP 42 in. (riding mower) · 2 fixes
X570 Multi-Terrain Tractor 24 HP 48 in. (riding mower) · 2 fixes
Z345M Zero-Turn Mower 22 HP 42 in. (riding mower) · 2 fixes
Z355R Zero-Turn Mower 22 HP 48 in. (riding mower) · 2 fixes
Z530M ZTrak Zero-Turn Mower 24 HP 54 in. (riding mower) · 2 fixes

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