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OIL LEAK

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

John Deere JS26 Self-Propelled Mower 190cc 21 in. OIL LEAK Error Fix: Oil Leaking

Oil dripping or seeping from engine. Causes: loose drain plug (most common after oil change), crankshaft seal worn, valve cover gasket (on OHV engines), oil filler cap not seated. Check oil level before each use if leak is present.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error OIL LEAK on the John Deere JS26 Self-Propelled Mower 190cc 21 in. means: Oil Leaking. The top-ranked community fix is “Replace Crankshaft Seal or Valve Cover Gasket” (medium difficulty, ~60 min, DIY cost: $15-$25). 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:

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-$220.

Other John Deere Models with Error OIL LEAK

E130 Lawn Tractor 22 HP 42 in.

riding_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

S240 Sport Lawn Tractor 21.5 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 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 OIL LEAK

What does error code OIL LEAK mean on a John Deere JS26 Self-Propelled Mower 190cc 21 in.?

Error code OIL LEAK on the John Deere JS26 Self-Propelled Mower 190cc 21 in. means: Oil Leaking. Oil dripping or seeping from engine. Causes: loose drain plug (most common after oil change), crankshaft seal worn, valve cover gasket (on OHV engines), oil filler cap not seated. Check oil level before each use if leak is present.

How do I fix error code OIL LEAK on my John Deere JS26 Self-Propelled Mower 190cc 21 in.?

The most successful fix is "Replace Crankshaft Seal or Valve Cover Gasket" (medium difficulty, ~60 minutes). Estimated DIY cost: $15-$25. HomeMD has 2 community-ranked fixes for this error.

Is error code OIL LEAK on a John Deere JS26 Self-Propelled Mower 190cc 21 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 JS26 Self-Propelled Mower 190cc 21 in. error OIL LEAK myself?

Yes — the top-ranked community fix ("Replace Crankshaft Seal or Valve Cover Gasket") is rated medium difficulty and takes about 60 minutes. Tools needed: Wrench set, Flywheel puller, Seal driver or suitable socket, Torque wrench.

How much does it cost to repair John Deere JS26 Self-Propelled Mower 190cc 21 in. error OIL LEAK?

DIY cost: $15-$25. Professional repair typically costs $150-$220. 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 OIL LEAK error?

Error code OIL LEAK also appears on 10 other John Deere models: E130 Lawn Tractor 22 HP 42 in., JS46 Walk-Behind Mower 21 in., S100 Lawn Tractor 17.5 HP 42 in., S130 Lawn Tractor 22 HP 42 in., S240 Sport Lawn Tractor 21.5 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 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 OIL LEAK error?

Error code OIL LEAK also appears on 10 other John Deere models:

E130 Lawn Tractor 22 HP 42 in. (riding 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
S240 Sport Lawn Tractor 21.5 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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