New Lower Unit Gearcase Seal Kit Compatible With 2001-2021 Suzuki Df90 Df100 4-Cyl 4-Stroke +

JOHNSON / EVINRUDE / SUZUKI 90-140HP LOWER UNIT GEARCASE SEAL KIT — Comprehensive 4-Stroke Service Kit (2001-2023):

REBADGED ENGINE CONTEXT:
• Johnson/Evinrude 140HP 4-Stroke Outboards (2003-2006) Are Rebadged Suzuki DF140 Engines
• Same Physical Engine Sold Under Both Brand Names
• This Kit Fits Both Suzuki Original AND Johnson/Evinrude Rebadged Versions
• 2-Stroke OMC-Built Johnson/Evinrude 90-140HP Use Different Kit

SUZUKI DF140 APPLICATIONS:
• Suzuki DF140 140 HP 4-Cyl 4-Stroke Outboard (2002-2023)
• Suzuki DF140T 140 HP 4-Cyl Outboard (2002-2009)
• Suzuki DF140Z 140 HP 4-Cyl Outboard (2002, 2010 & Up)
• Suzuki DF140A 140 HP 4-Cyl 4-Stroke Outboard (Newer A Variant)
• Suzuki DF140B 140 HP 4-Cyl 4-Stroke Outboard (Newer B Variant)
• Suzuki DF140A / AP / AT (2014-2023 Various Variants)

SUZUKI DF115 APPLICATIONS:
• Suzuki DF115 115 HP 4-Cyl 4-Stroke Outboard (2001-2023)
• Suzuki DF115T 115 HP 4-Cyl Outboard (2001-2009)
• Suzuki DF115Z 115 HP 4-Cyl Outboard (2010 & Up)
• Suzuki DF115A 115 HP 4-Cyl 4-Stroke Outboard (Newer A Variant)
• Suzuki DF115B 115 HP 4-Cyl 4-Stroke Outboard (Newer B Variant)

SUZUKI DF100 APPLICATIONS:
• Suzuki DF100 100 HP 4-Cyl 4-Stroke Outboard (2009-2021)
• Suzuki DF100T 100 HP 4-Cyl Outboard (2009 & Up)
• Suzuki DF100A 100 HP 4-Cyl 4-Stroke Outboard (Newer Variant)

SUZUKI DF90 APPLICATIONS (Source Expansion):
• Suzuki DF90 90 HP 4-Cyl 4-Stroke Outboard (2001-2008)
• Suzuki DF90T 90 HP 4-Cyl Outboard (2001-2008)

JOHNSON / EVINRUDE 4-STROKE APPLICATIONS (Rebadged Suzuki Engines):
• Johnson 140 HP 4-Cyl 4-Stroke Outboard (2003-2006)
• Evinrude 140 HP 4-Cyl 4-Stroke Outboard (2003-2006)
• Same Physical Engine as Suzuki DF140 (Rebadged)

⚠️ NOT COMPATIBLE WITH:
• 2-Stroke OMC-Built Johnson/Evinrude 90-140HP (Different Engine Architecture)
• Suzuki DT75 / DT85 / DT115 / DT140 2-Stroke (Different Engine Architecture)
• Suzuki DF60 / DF70 (Use 25700-99E00 — Different Kit)
• Suzuki DF50 / DF60 3-Cyl (Use 25700-99E00)
• Suzuki DF70A / DF80A / DF90A (Use 25700-87L01 — Different Platform)
• Suzuki DF150 / DF175 / DF200 / DF225 / DF250 (Use 25700-93J00)
• Older Suzuki DF60 / DF70 4-Cyl 1998-2009 (Use 25700-99E00)

SPECIFICATIONS:
• Type: Lower Unit Gearcase Seal Kit (Comprehensive)
• Application: Suzuki DF90 / DF100 / DF115 / DF140 4-Stroke Outboards
• Application: Johnson/Evinrude 140HP 4-Stroke (Rebadged Suzuki)
• HP Range: 90 HP through 140 HP
• Engine Type: 4-Stroke ONLY
• Cylinder Configuration: 4-Cylinder
• Year Coverage: 2001-2023
• Includes: Gasket, O-Rings, Oil Seals, Drain Plug Gasket
• Material: High-Quality Marine Seal Materials
• Function: Complete Lower Unit Seal Replacement
• Condition: New

OEM PART NUMBERS:
• Suzuki: 25700-92J00 (Primary OEM — All DF90/100/115/140 Years)
• Johnson/Evinrude/OMC: 5033922 (OEM — Rebadged Cross-Ref)

KIT CONTENTS:
• Lower Unit Gearcase Gasket
• Multiple O-Rings (Various Sizes / Positions)
• Oil Seals (Prop Shaft and Drive Shaft Positions)
• Drain Plug Gasket
• Other Required Seal Kit Components

WHEN TO USE THIS KIT:
• Lower Unit Complete Rebuild
• Annual Lower Unit Service Interval
• Water in Gear Oil (White / Milky Appearance)
• Gear Oil Leaking from Prop Shaft Area
• Gear Oil Leaking from Drive Shaft Area
• Replacing Forward / Reverse Gear Thrust Bearings
• Replacing Prop Shaft Bearings
• Drive Shaft Service
• Routine Preventive Maintenance

SYMPTOMS REQUIRING SEAL KIT REPLACEMENT:
• Milky / White Gear Oil at Service Drain (Water Contamination)
• Gear Oil Leaking from Prop Shaft Area
• Gear Oil Leaking from Drive Shaft Area
• Failed Pressure Test During Routine Service
• Lower Unit Running Hot
• Cloudy / Discolored Gear Oil
• Loss of Lubrication
• Routine Annual Service Interval Reached

INSTALLATION:
• Step 1: Drain old gear oil completely (note color / condition)
• Step 2: Remove lower unit from outboard
• Step 3: Take photos and notes of disassembly order / orientation
• Step 4: Disassemble gearcase per service manual
• Step 5: Remove all old seals, gaskets, o-rings
• Step 6: Clean all sealing surfaces thoroughly
• Step 7: Inspect gearcase housing for damage or corrosion
• Step 8: Install new seals with proper orientation (lip direction critical)
• Step 9: Install new gaskets and o-rings with light marine grease
• Step 10: Reassemble gearcase per service manual torque specs
• Step 11: Pressure test gearcase before reinstalling lower unit
• Step 12: Reinstall lower unit to outboard
• Step 13: Refill with proper fresh gear lube
• Step 14: Test forward and reverse operation

⚠️ IMPORTANT — SUZUKI MOTORS DON'T ALWAYS GO BY YEAR:
• Identify Your Engine by MODEL NUMBER (e.g., DF140T, DF115Z) AND OEM Part Number
• Cross-Reference Your Specific Outboard Serial Number for Accurate Fitment

NOTE: Verify your OEM part number 25700-92J00 (Suzuki) or 5033922 (Johnson/Evinrude) before ordering. Suzuki uses different seal kits across model generations and platforms — DF60/DF70 uses 25700-99E00, DF70A/80A/90A uses 25700-87L01, DF150-250 uses 25700-93J00. ***2-stroke OMC-built Johnson/Evinrude 90-140HP also use a different kit*** — only Johnson/Evinrude 4-stroke 140HP (rebadged Suzuki) is compatible with this kit. Replace all seals concurrently for proper lower unit longevity.